Maintenance & Repair

Proper semi-truck alignment is one of the most important aspects of vehicle maintenance for heavy-duty trucks. When your truck’s wheels aren’t properly aligned, it can lead to a host of costly problems. This could include uneven tire wear and steering wheel vibration, to decreased fuel efficiency and poor vehicle control.

In this guide, we break down what alignment really means for a diesel truck, how to spot alignment issues, and why keeping your truck properly aligned can extend tire life, improve fuel economy, and ensure a smooth ride for thousands of miles.

What Is Semi-Truck Alignment?

Truck alignment, also called truck wheel alignment, is the process of adjusting a vehicle’s suspension components and axle angles so that the wheels meet the road at precise angles. These angles, including the camber, caster, and toe, determine how your tires make contact with the pavement.

In heavy-duty applications, alignment typically focuses on the front axle, but can extend to the rear axle or even include all axles in what’s known as a final alignment. When any of these angles are off, your semi-truck might experience steering wheel vibration, vehicle pulling, or abnormal tire wear.

It’s important to note that alignment isn’t just about the wheels. It’s also about how the steering components, suspension system, and axle offset work together to keep your truck driving straight and steady under heavy loads.

Why Semi-Truck Alignment Is Important

A properly aligned semi-truck offers multiple benefits that go beyond tire preservation.

First and foremost, truck drivers experience better steering response and safer handling. When alignment is off, the truck may pull to one side, the steering wheel may feel loose or shaky, or the truck may show signs of a crooked steering wheel or off-center steering wheel.

But the impact isn’t just felt in the cab. Misalignment creates increased rolling resistance, which in turn reduces fuel efficiency. For long-haul drivers and fleet managers, poor fuel economy can significantly raise operational costs.

Signs a Semi-Truck Needs Alignment

How do you know it’s time to get your alignment checked? Watch for these common indicators of alignment problems:

• The truck pulls to one side or has difficulty driving straight.
• Steering wheel vibration, especially at highway speeds.
• A crooked steering wheel or off center steering wheel.
• Uneven or abnormal tire wear across the treads.
• Frequent corrections are needed to keep the vehicle in a straight line.
• Decreased fuel efficiency.

All of these are red flags that your semi-truck’s alignment is off. Ignoring them may lead to premature wear on tires and key suspension and steering components.

How Often Should a Semi-Truck Alignment Be Done?

There’s no one-size-fits-all answer, but routine maintenance suggests that heavy-duty vehicles should have their alignment checked every 50,000 to 60,000 miles. However, various factors can require more frequent checks.

If your truck has recently hit a curb, driven over a pothole, or been involved in an accident, it’s wise to check alignment immediately. Likewise, trucks carrying frequent heavy loads may require more attention due to increased strain on the axles and suspension system.

Based on our expertise, keeping alignment as part of your vehicle maintenance schedule helps prevent alignment issues from spiraling into bigger, costlier problems.

The Truck Wheel Alignment Process

During a wheel alignment, a technician uses specialized equipment, usually laser or computerized systems, to measure and correct wheel angles. The process begins by assessing current positions relative to OEM specifications and ends with adjustments to steering, suspension, and axle settings.

Most full-service alignment shops will include a front axle adjustment and, if needed, corrections to the rear axle. Some shops even specialize in aligning heavy-duty and diesel truck models, which often require more precision due to their weight and usage.

Causes of Misalignment in Semi-Trucks

Misaligned wheels can result from everyday events, especially when driving a heavy-duty truck. Common causes include:

• Hitting potholes, curbs, or road debris.
• Overloaded or unbalanced trailers.
• Worn suspension components.
• Faulty or damaged steering components.
• Uneven axle offset.

Even a small impact can throw off alignment. And, when you consider the weight and length of a fully loaded semi-truck, the effect on tire wear and steering can be dramatic.

The Benefits of Regular Wheel Alignments

Routine wheel alignment services offer long-term advantages for semi-truck owners and fleet operators:

• Improved fuel efficiency through reduced rolling resistance.
• Longer tire life with even wear across all tires.
• Enhanced steering system performance and vehicle handling.
• Smoother rides for truck drivers and less driver fatigue.
• Lower operational costs from fewer part replacements.

Even small adjustments can lead to noticeable improvements in performance and savings. For example, maintaining proper tire pressure and alignment can boost fuel efficiency by as much as 3%. This is a meaningful difference when operating heavy-duty vehicles over long distances.

Perhaps most importantly, a proper alignment ensures that the truck remains safe and roadworthy. For owner-operators and fleets alike, it’s an investment that pays for itself through extended equipment life and better fuel returns.

How Much Does Semi-Truck Alignment Cost?

The cost of semi-truck alignment can vary based on the number of axles serviced (front only vs. full alignment), labor costs in your area, condition of steering and suspension systems, and whether additional services (like tire balancing) are included.

On average, alignment for a diesel truck or heavy-duty vehicle ranges from $200 to $400. If your truck needs adjustments to the rear axle or extensive suspension work, the cost may be higher.

But compared to the price of replacing multiple sets of tires or burning excess diesel due to poor alignment, regular alignments are a smart financial move.

Choosing the Right Alignment Shop

The right shop should use specialized equipment designed specifically for truck wheel alignment. They should also have proven experience diagnosing and repairing suspension systems, with a strong understanding of axle offset, rear axle adjustments, and precise steering geometry.

Look for a provider with a solid reputation, ideally backed by positive reviews from other truck drivers or fleet operators who trust their work.

Conclusion

Keeping your semi-truck alignment in check is essential for maintaining tire life, reducing operational costs, and ensuring a smooth ride.

From minimizing uneven tire wear and steering wheel vibration to improving fuel efficiency and extending the life of your steering and suspension components, regular wheel alignment is a crucial part of vehicle maintenance.

If you’re a truck driver or small fleet owner looking to maintain your heavy-duty vehicle properly, don’t overlook the importance of routine alignment checks. For help financing repairs or locating trusted service partners, turn to Mission Financial Services.

Regular oil changes are crucial for keeping your semi-truck’s engine clean and extending its lifespan. However, costs can add up quickly, impacting your profits if not managed wisely.

So, how do you know when it’s time for an oil change, and what does a typical semi-truck oil change cost? This guide covers everything you need to know, including cost factors and money-saving tips to keep your truck running smoothly without breaking the bank.

Understanding the Importance of Oil Changes

Besides getting rid of the contaminants, dirt, and debris in your old oil, keeping your engine clean, and preventing engine seizure, frequent oil changes are crucial for the following reasons:

• Protecting your engine from premature wear and tear. Your semi-truck engine consists of several precision-engineered parts designed to work together. Oil lubricates these parts, dissipates heat, and prevents friction, which causes wear and tear that can reduce its performance.

 

• Increased engine efficiency. When your engine is lubricated properly, it requires less energy to rotate as you drive, maximizing its performance.

 

• Better gas mileage. An efficient engine performs at its optimum without overusing fuel. You can cover more miles with less fuel, reducing your fuel budget and saving more money.

 

• Environmental benefit. When your semi-truck engine works efficiently, it burns less fuel and releases fewer emissions into the environment.

Factors Influencing Oil Change Costs

The average cost of a semi-truck oil change depends on several factors. Some of these include:

• Engine design complexities. The engines of newer trucks are more complex and may require specialized oil than older ones.

 

• Type of oil used. Some truck models work best on synthetic oil, while others require conventional or a blend of synthetic oil. Different types of oil cost different amounts. For example, if your semi-truck requires synthetic oil, your oil changes will cost more as it’s the most expensive oil.

 

• Labor and service provider expenses. Some engines are more complex to work on than others, especially the newer models. Service providers will, therefore, charge differently for their oil change labor and other add-on services.

 

• Geographic location. Oil change service costs differ in various locations.

 

Typical Oil Change Intervals for Semi Trucks

Oil change frequency varies by semi-truck, but general guidelines are: 5,000 miles for conventional oil, 8,000 miles for semi-synthetic, and 10,000 miles for full synthetic. However, always refer to your truck’s user manual for the most accurate schedule.

Regular oil level checks during trips are essential to maintaining engine health. Here is a quick guide on checking your semi-truck oil level using the well-known dipstick method.

Risks of Neglecting Oil Changes

You might be wondering what would happen if you neglect regular oil changes. Well, some of the risks you’re exposing yourself to when you put off an oil change include:

• Engine damage. When you fail to replace your oil with fresh oil, dirt, and debris from the old oil accumulate. Your engine then develops carbon deposits that clog your system, leading to engine damage, which is usually more expensive to repair.

 

• Reduced fuel economy. Without proper lubrication, your semi-truck engine burns more fuel faster than usual. It decreases fuel economy as you’ll require more fuel to cover fewer miles. This will increase your operating costs and reduce your profits.

 

• Overheating. Extremely low engine oil levels cause your engine to build friction and run at higher-than-normal temperatures. As a result, your engine components begin to wear and tear rapidly, developing costly engine issues.

 

• Complete engine failure. Taking too long to change oil turns it into sludge. If this happens, your engine parts will not get lubricated. Instead, the sludge might gum them up, causing your semi-truck engine to seize and fail.

Semi Truck Oil Change Cost

A basic conventional oil change costs around $35, rising to $75 with add-ons like an oil filter replacement and tire rotation. Semi synthetic oil changes range from $40 to $100, while full synthetic costs $65 to $125.

However, prices vary depending on factors like truck model and special filters, with some changes exceeding $260.

Create a Preventative Maintenance Plan

One of the best ways to save money and ensure your engine operates efficiently is to create a preventative maintenance plan for your oil changes at the required intervals.

For cost-effective and reliable service, choose a trusted truck repair shop, preferably an independent one, as they’re often more affordable and provide personalized care.

Once you’ve found a mechanic, set a budget for regular oil changes and maintain a schedule. Keeping records of routine maintenance ensures timely oil changes and helps extend your truck’s lifespan.

Conclusion

Regular oil changes are essential to keeping your semi-truck running efficiently. While they require frequent spending, they help you save on fuel and prevent costly repairs in the long run.

For even greater savings, consider changing the oil yourself. Though you’ll need to invest in wrenches, an oil pan, a jack, and gloves, this one-time cost pays off with every DIY oil change.

If you ever need help financing other semi-truck repairs, call us. We offer affordable semi-truck repair loans tailored to your situation to keep you on the road.

Conducting pre-trip inspections is essential for your safety as a truck driver and the safety of all road users. That’s why the Federal Motor Carrier Safety Administration (FMCSA) provides pre-trip inspection checklist standards all commercial driver’s license (CDL) holders must adhere to before hitting the road.

Usually, meeting FMCSA’s pre-trip inspection standards involves a few steps and might take approximately 10 -15 minutes minimum. If you’re wondering what a pre-trip inspection checklist is and why it’s important, read on to learn more.

What is a Pre-Trip Inspection Checklist?

The Department of Transportation (DOT) pre-trip checklist is an essential tool for Class A and Class B commercial driver’s license (CDL) holders to review before operating their vehicles. It is a guide to help you inspect various parts of your commercial vehicle and ensure it’s in proper working order before heading out.

The specific items on a pre-trip checklist can vary depending on the type of commercial vehicle and its intended use. For commercial trucks, the checklist covers nearly all components, accessories, and systems, including the truck, trailer, and cargo.

For Class A CDL holders, the checklist focuses on towing systems, such as the trailer parking brake and coupling areas, and typically extends to the trailer, flatbed, or other towed items. In contrast, the Class B CDL checklist emphasizes systems and parts for non-towing commercial vehicles.

Both Class A and Class B checklists share common items, including checks for brake lights, oil levels, front and rear suspension, and minimum brake pad thickness, among others.

Importance of a Pre-Trip Checklist?

A thorough inspection checklist streamlines the pre-trip process, ensuring careful and consistent vehicle assessments without missing details. It also simplifies completing required inspection reports, which is crucial for several reasons:

• Safety–well-performed pre-trip inspections help you identify potential mechanical issues early. Detecting and resolving mechanical problems in time ensures your truck is safe to drive. It also minimizes delays from unexpected vehicle breakdowns.

 

• Compliance–FMCSA provides specific vehicle inspection regulations commercial drivers must follow to ensure their vehicles are in peak condition for maximum road safety. Failing to comply with these regulations or performing incomplete pre-trip inspections might lead to penalties and affect your Compliance, Safety, and Accountability (CSA) score.

Low CSA scores can increase insurance premiums, leading to high operating costs.

• Maintenance– routine pre-trip inspections ensure proper vehicle maintenance. You’ll prolong the vehicle’s lifespan and avoid costly repairs later.

 

• Company reputation–proper adherence to all federal inspection regulations demonstrates your commitment to safety and professionalism. It leaves a positive impression on customers and other industry stakeholders, boosting your company’s reputation.

What to Include on a Pre-Trip Inspection Checklist

Commercial trucking companies may prepare their own pre-trip inspection checklist, adding their expectations and twists to the pre-trip inspection procedure. However, all processes must follow the federal pre-trip inspection checklist criteria.

A standard legal pre-trip inspection procedure should include the following steps and elements.

Step 1: Examine The Engine Compartment

Examining the engine compartment involves assessing the condition of various components. These include:

• Fluids–Check the oil and power steering fluid levels using a dipstick to ensure all fluids, including oil and coolant, are at the proper levels. Inspect hoses and reservoirs for leaks, and look beneath the truck for any fluid stains, which could indicate leaks of fuel, oil, coolant, or brake fluid.

 

• Belts–thoroughly inspect all belts for pumps, alternators, and compressors to ensure they have no cracks or frays. Also, confirm they’re in place, giving no more than half an inch of play.

Other components to pay close attention to and ensure they’re securely mounted and in excellent condition inside the engine compartment include:

• Air compressor
• Radiator
• Alternator
• All pumps, including the water pump and power steering pumps
• Wiring

Step 2: Inspect the Front Parts of Your Commercial Vehicle

Front-of-vehicle inspection checklist items often include checking parts of your steering equipment, such as:

• Steering box–check the steering box to ensure it is intact. All connected hoses must be properly mounted without any power steering fluid leaks.
• Steering column or steering shaft–this should be straight.
• Drag link–check whether the rubber is well-greased and uncracked.
• Tie rod plus control arms–both must be straight.
• Pitman arm–confirm if all the caste nuts and cotter pins are present and secure

Step 3: Check The Front Suspension Systems

This includes examining the following parts:

• Spring mounts and hangers–ensure the spring mounts hold all spring hangers securely in position. Look for signs of cracks, wear, or breakage that might compromise their performance.
• Shock absorbers–check for splits, leaks, or dry rot within the rubber. Focus more on the sections where the top and bottom parts overlap because most leaks occur here.
• U-bolts–confirm if all bolts are secure and tightened around the springs and axle.

Step 4: Inspect the Brake System

Your commercial vehicle’s brake system is one of its most essential parts. Take your time to examine the entire brake system and perform several brake tests as outlined below:

• Brake linings and pads–the brake pad’s minimum thickness should be a quarter of an inch. Also, examine the linings for any debris.
• Air brake hose–ensure the line is properly connected and has no cuts or splits. You also want to confirm there is no air leak from the hose.
• Brake chamber–the brake chamber must be sealed completely. There shouldn’t be any audible air leaks.
• Brake drum–look at the color of the brake drum. If blue, it indicates excessive heat and might need further scrutiny.
• Hand brake–your system’s push rod should have an inch of play (not more) on either side and stand at 90 degrees when pulled.

You may need to perform a 9-, 7-, or 5-step brake test to inspect all brake components accurately.

Step 5: Examine the Lights and Reflectors

Inspect your lights and reflectors to ensure they’re all in perfect working condition and are clear of debris. The pre-trip inspection checklist items you’ll have to go through here include:

• High and low beams
• Brake lights
• Turn signals
• 4-way emergency flasher function
• License plate lights and running lights
• Reflector and DOT tape–ensure these are clean

Step 6: Inspect the Mirrors and Windshield

For this step, be keen to check the following:

• External mirrors plus mirror brackets–confirm if all external mirrors are clean and do not have any cracks or obstructions. They should also be attached to their mirror brackets firmly and well-adjusted to provide a proper rear view.

 

• Windshield–there shouldn’t be any cracks more than one inch. Also, run your windshield wipers to ensure they work and check that you have adequate windshield washer fluid.

Step 7: Conduct A Battery and Trailer Coupling System Check

This step involves inspecting the fuel tank, battery area, and trailer coupling system.

Ensure the battery is properly charged and that all key components, such as the exhaust system, suspension, electrical connections, and coupling mechanisms, are secure, undamaged, and free of leaks. Check that everything is in good working order before continuing.

Step 8: Check the Wheels and Tires

To perform wheel and tire inspections properly, check the inflation levels and examine the overall tire condition, particularly tread depth. Some of the most important sections you must pay attention to closely are:

• Driver and steer tires–ensure the tire tread is even, and the minimum tread depth on drive tires is 2/32”, while that of steering axle tires is 4/32”. The treads and sidewalls shouldn’t have cracks, bulges, or abrasions.
• Axle seals and hub seal–the axle seal and hub seal should be intact with no leaks
• Wheel rims–there shouldn’t be any illegal welds or unauthorized repairs on the rims.
• Dual spacing–ensure there’s enough space between any dual tires
• Lug nuts and bolts–these components should be intact in their lug bolt holes.
• Valve stem–confirm there are no audible air leaks in the valve stem.

Step 9: Inspect the Trailer

Inspect the trailer to ensure all key components, such as the headboard, doors, and mud flaps, are structurally sound and securely mounted. Check for any signs of damage, such as cracks, holes, bends, or missing parts, and ensure everything is intact and functioning properly.

Step 10: In-cab Inspection

Ensure all in-cab components are undamaged and functioning properly. This includes checking the steering wheel, seat belts, pedals, gauges, horns, fuse box, parking brake, heater, and defroster to confirm they are all in working order.

Step 11: Inspect the Rear of the Vehicle

Before connecting your truck to the trailer, inspect the rear end to ensure the brake chambers are undamaged, shocks and airbags are intact, and the driveshaft is clean, with no debris in the U-joints. Verify that the frame is sturdy, the fifth wheel is well-greased, and the fuel tanks are free of leaks.

Step 12: Check the Emergency Kit

Truck drivers must carry an emergency kit as required by DOT regulations, including a fire extinguisher, warning devices, and spare fuses. During your pre-trip inspection, confirm the kit is complete and functional, including items like warning flags, reflective triangles, a safety vest, first-aid kit, jumper cables, a flashlight, strobe lights, and extra batteries.

How often should I perform a pre-trip inspection?

According to FMCSA’s current regulations, all truck drivers must perform and log in at least one thorough inspection in their hours of service daily. The pre-trip inspection should happen before each haul. You must also complete an inspection report if you find any defects during your inspection.

Final Thoughts

Thorough pre-trip inspections and regular truck maintenance significantly reduce road accidents and enhance safety. By following the provided checklists, you can ensure your pre-trip inspections meet legal requirements.

For additional safety tips and to further improve your practices as a commercial truck driver, visit our blog. If you find defects that need immediate repair during your inspections, reach out to us for financing options. We offer affordable commercial truck repair loans to help you keep your truck in excellent condition without disrupting your business’s cash flow.

 

Truck suspension systems are crucial for a comfortable ride and keeping your cargo safe. Suspension systems also have a major impact on every other component of your vehicle, so maintaining truck suspension systems is essential for getting the most miles out of your semi-truck.

Here’s what you need to know about truck suspension and how to keep it in good condition.

Importance of a Heavy-Duty Truck’s Suspension

A truck’s suspension system is one of its most important components. Here are some of the major reasons heavy-duty truck suspension is vital.

Maintains Stability and Control

A heavy-duty truck’s suspension is essential for stability and control.

A vehicle’s suspension system keeps the truck balanced – especially when carrying heavy loads. Good suspension prevents the vehicle from tipping over during sharp turns or on uneven roads.

This is essential for driving the truck safely.

Improves Ride Quality

You need the truck’s suspension system for a smooth ride.

A quality suspension system absorbs bumps and rough patches on the road, ensuring a more comfortable ride for the driver and better protection for the cargo. This smoother experience is especially crucial for long trips, as it reduces driver fatigue.

Helps With Handling and Maneuverability

Having good shock absorbers improves road handling.

The suspension system allows the truck to respond quickly, which is important when navigating tight spaces or making sudden movements. Good handling and maneuverability are crucial for avoiding accidents and ensuring the truck can operate well in different conditions.

Absorbs Shocks and Vibrations

The suspension system absorbs shocks and vibrations from the road. This offers protection and keeps the truck’s components from wearing out too quickly. Shock absorbers also protect the cargo.

Optimizes Load-Carrying Capacity

A well-designed suspension system optimizes the truck’s load-carrying capacity.

Suspension systems evenly distribute the weight of the cargo, which helps prevent overloading any single part of the truck. A balanced weight distribution helps the truck carry more weight safely and extends the life of the truck by eliminating excessive stress on its components that could cause damage.

Truck Suspension System Types

Whether it’s a front or truck rear suspension system, there are some main types that heavy-duty vehicles use:

• Leaf spring suspension system: Known for its durability and simplicity, these systems consist of stacked metal layers. It’s more cost-effective to install leaf suspension systems, and these systems are ideal for handling heavy loads. However, leaf springs may offer a stiffer ride for heavy-duty vehicles.

 

• Air Suspension: Provides a smoother ride with air-filled bags instead of metal springs and offers adjustable ride height and stiffness for better handling and comfort. Air suspension systems are more expensive.

• Coil spring suspension systems: Coil spring suspension uses coiled metal springs to absorb shocks and provide a smoother ride. This offers better comfort and handling compared to leaf springs, but they’re not as good at handling heavy loads, so they’re not the most effective for heavy-duty vehicles.

Signs of Suspension Problems

Being able to identify suspension system issues early on is key to a well-maintained truck. Here are some critical signs to look out for.

The Truck Bounces as You Drive

If your truck bounces excessively and uncomfortably while driving, it usually means the shock absorbers or struts are worn out.

Tractor Drifting or Pulling During Turns

When your truck drifts or pulls to one side during turns, it either means you’ve got suspension problems or your heavy-duty truck alignment is off. Either way, you’ll need to get it checked out to avoid difficult and unsafe handling.

Uneven Tire Wear

Uneven tire wear is a common sign of suspension trouble. If the suspension isn’t distributing weight evenly, certain tires will wear out faster than others.

You’ll want to fix this issue as soon as you can before it causes greater damage to your vehicle.

The Truck Exhibits Body Roll

Excessive body roll when turning is a sign of weak stabilizer bars or worn-out shocks. This makes the truck feel less stable and can be dangerous during sharp turns – especially if you have a heavy load.

Your Truck Makes Unusual Noises

Unusual clunking or squeaking noises from your truck are never a good sign.

These noises often point to worn suspension components and generally mean serious issues that need immediate attention.

Front-End Diving and Rear Squatting

If the front end of your truck dives when braking and the rear squats when accelerating, it’s a sign that the shocks or struts are failing.

Vehicle Sits Lower

A truck that sits lower than usual may have broken or damaged springs. This can affect your vehicle’s handling load-carrying abilities.

Leaking Air

If your truck has an air suspension system, leaking air means you’ve got a major problem with the airbags or lines. If you hear air escaping, get it checked out straight away.

Difficulty in Steering

If your truck becomes hard to steer, it often means you’ve got suspension issues affecting the steering system. This can make driving difficult and dangerous.

Suspension Maintenance Tips

Keeping your truck suspension parts in good condition is simple by following the right maintenance routine:

• Inspect Regularly: Regularly check your suspension for signs of wear or damage. Look for any cracks, rust, or loose parts.

 

• Check Alignment and Balance: Ensure your truck’s wheels are properly aligned and balanced.

 

• Lubricate Moving Parts: Regularly lubricate any moving parts of the suspension to reduce friction and prevent wear.

 

• Monitor Fluid Levels: Keep an eye on fluid levels in hydraulic suspensions. Low fluid can lead to poor performance and damage.

 

• Replace Worn-Out Components: Replace any worn-out or damaged suspension components straight away to ensure the rest of your truck doesn’t get affected.

Conclusion

Maintaining a truck’s suspension is crucial for safety, comfort, and a long-lasting vehicle. Regular inspections and proper care keep your truck running smoothly and can help you avoid major issues further down the line.

Looking to purchase a new commercial truck? Then get started with Mission Financial Services and discover just how easy accessing truck financing can be.

Your engine is the lifeblood of your semi-truck. If it’s not working optimally, your vehicle’s performance decreases, and this can bring your trucking operations to a standstill.

Regular engine repairs keep your semi-truck engine running fine. But, sometimes, an engine overhaul is necessary to minimize losses from frequent maintenance and maximize your truck’s operational efficiency so your business thrives.

What does a semi-truck engine overhaul include, and when should you consider an overhaul? Here’s everything you need to know about semi-truck engine overhauling, including the best ways to approach the entire process as a fleet manager or owner-operator.

What Does a Semi-Truck Engine Overhaul Include?

Semi-truck engine overhauling is a comprehensive process for repairing or renewing all the essential parts of a semi-truck’s engine. The entire process aims to restore the engine to its optimal original functioning.Unlike engine repair, where mechanics check and maintain only the damaged parts, a complete semi-trailer engine overhaul includes four key steps:

• Disassembling and inspection. The first step involves removing the engine from the semi-truck, dismantling it, and inspecting each part for any signs of damage or wear. Any worn or damaged components get repaired or replaced, depending on the extent of the damage.
• Cleaning. After inspection and repair, qualified mechanics use specialized tools, including ultrasonic cleaning devices and high-pressure hoses to clean the engine thoroughly, removing any accumulated debris or dirt.
• Re-assembling. Once clean, mechanics put the engine back together with all the new or refurbished components.
• Testing. The last step of the semi-truck engine overhauling process involves testing to ensure the reconstructed engine operates correctly, according to the original equipment manufacturer’s recommendations.

When to Overhaul Your Semi-Truck?

Engine problems are expensive to repair. They also worsen with time and can undermine your safety on the road. Here are some tell-tale signs of common engine problems indicating your engine could use a complete overhaul

Crossing Mileage of 1,000,000 miles

If you haul heavy loads frequently and your truck’s engine is nearing the 1 million miles mark, consider a major overhaul as preventative maintenance. Most heavy trucks require mechanical attention to stay safely operational once they reach high mileage limits.

Reaching the 1 million miles mark is significant for any vehicle. Beyond this point, a large truck’s engine is more likely to develop issues such as vacuum and oil leaks if its components are not routinely maintained.

Performing a major overhaul at this stage is a wise move to revitalize your truck and keep operational costs low in the long run.

Rough Running Engine

Healthy engines are not silent. However, loud noises from under the hood signal your semi-trailer needs service. Unfamiliar noises indicate problems with various parts of your engine.

For example, a whistling sound may mean the hose on your semi-truck engine’s cooling system has cracks. A whirring sound signals problems with your existing engine belts, and continuous tapping, clicking, or ticking shows your valves or pistons aren’t working well.

The most cost-effective way to handle rough-running engine problems is to conduct a major overhaul when you hear an unusual engine noise. A proper semi-truck engine overhaul will eliminate all the rough-running engine issues at once.

Large Metal Particles in Filter Pleats

If you conduct an oil filter test during your regular maintenance activities and notice large metal particles in the filter pleats, an engine overhaul may be necessary to prevent catastrophic failure.

Often, such metal shavings indicate wear and tear on parts of your engine that undergo a lot of friction, like the camshafts, bearings, pistons, and rods. You may need the help of expert technicians to perform further lab analyzes and inspections to assess the gravity of the problem.

Foam on the Dipstick

A light-colored form on the dipstick shows there’s water in the oil. If this is so, chances are your gasket head is leaking. Or, your engine block has a crack. It’s advisable to perform an engine overhaul to repair the problem on time and avoid further issues.

Decrease in Oil Viscosity

Decreased oil viscosity is a sign of oil dilution, which lowers engine efficiency.  When your oil viscosity is too low, its sealing performance decreases, and the cylinder leaks easily. This reduces the engine’s power and can cause the exhaust gas to get into the crankcase, leading to more costly repairs.

To test your oil’s viscosity, put an oil drop on a piece of cardboard and watch how quickly it spreads. The faster it spreads, the more dilute it is. And, the more diluted the oil is, the more wear your vehicle will experience and the quicker you’ll need engine repair.

Burning Oil Smell

A burning oil smell is a sign your engine oil is overheating. If you notice this, take your truck to a qualified mechanic with the right tools for proper engine repair.

Cylinder Compression Is Low

Compression loss occurs because of leaks in one or more of your engine’s cylinders. This causes misfiring and decreased performance. The best solution is to replace all the leaking components. These could be the piston, head gasket, camshaft, or valves. And there’s no better approach than a complete engine overhaul to ensure all parts are in the best condition.

Exhaust Emitting Heavy or Blue Smoke

Blue or dark gray smoke from your exhaust pipe means your semi-truck engine is burning oil with the fuel in the combustion chamber. It indicates excessive wear on some engine components, including the piston rings, PCV valves, and valve seals. Serious engine work involving various parts replacement is necessary to improve your engine’s performance.

Ways to Carry Out a Semi-truck Engine Overhaul

There are two main approaches to semi-truck engine overhauling:

1. Seek Commercial Engine Overhaul Services

You can take your semi-truck to a repair shop where qualified mechanics and technicians will work on it. There are two types of repair shops to consider: certified and non-certified.

Certified repair shops offer top-notch engine services using original, high-quality systems and parts. While the cost of engine repairs at these shops is higher, the investment is worth it for the quality and reliability.

On the other hand, non-certified shops provide cheaper repairs, but the risk is greater. These shops don’t adhere to the same standards as certified ones and may use subpar parts and offer inferior services.

2. Purchase Overhaul Kits and Do-it-yourself

Most fleet managers prefer seeking professional help from commercial semi-truck engine overhaul services. But as an owner-operator, you can purchase an overhaul kit and do it yourself, especially if you’re comfortable working with engines or know someone well-versed with the equipment and overhaul process. It’s a more cost-effective solution.

Final Thoughts

Remember, preventative maintenance will always be better than cure when handling your semi-truck’s engine. A well-maintained engine saves you from costly repairs, making a huge difference in your profit margins and overall business operations.

Consider incorporating an annual engine overhaul into your regular maintenance schedule once your truck surpasses the 1 million mile milestone. However, always consult with a trusted certified mechanic to determine if an overhaul is necessary, as engine aging varies. Some engines may continue to run smoothly beyond the 1 million mark, especially if they have been well-maintained.

If you need help financing your semi-truck repairs, get in touch with us. We offer affordable commercial truck repair loans and can customize our options to suit your specific situation.