24/7 Emergency Diesel Engine Repair: Call (855) 450-1212 for immediate assistance

Diesel Engine Repair Services

Expert diagnostics and repair solutions for commercial truck engines to maximize performance and minimize downtime

Call (855) 450-1212

Expert Diesel Engine Repair Services

Your truck's diesel engine is the heart of your vehicle, and when it's not performing optimally, your entire operation suffers. Engine problems don't just affect your delivery schedule—they impact your profitability and customer satisfaction.

At MTS TruckAI Services, we specialize in comprehensive diesel engine repair and maintenance for all commercial truck makes and models. Our team of ASE-certified technicians has extensive experience with Cummins, Detroit Diesel, International, Paccar, Volvo, Mack, and all other major diesel engine manufacturers.

MTS TruckAI Diesel Engine Repair
MTS TruckAI Diesel Engine Maintenance

Our Diesel Engine Repair Services Include

Advanced Engine Diagnostics

Our technicians use state-of-the-art diagnostic equipment to accurately identify engine issues. We perform comprehensive testing of your engine's mechanical systems, electronic controls, and emissions components to pinpoint the exact cause of problems.

Engine Overhauls & Rebuilds

When your engine requires major repairs, our skilled technicians can perform complete engine overhauls and rebuilds. We disassemble, inspect, machine, and reassemble your engine using quality parts to restore factory specifications and performance.

Fuel System Repair

We diagnose and repair all components of your diesel fuel system, including fuel pumps, injectors, lines, and filters. Our technicians are trained in the latest common rail and electronic fuel injection technologies for optimal engine performance.

Turbocharger Service

Our turbocharger services include diagnostics, repairs, and replacements for all types of turbo systems. We address issues such as poor boost pressure, oil leaks, excessive smoke, and unusual noises to restore your engine's power and efficiency.

Cooling System Repairs

We provide comprehensive cooling system services, including radiator repairs and replacements, water pump service, thermostat replacement, and coolant flushes to prevent overheating and maintain optimal engine temperature.

Need Emergency Diesel Engine Repair?

Don't let engine problems keep you off the road. Our mobile diesel technicians are available 24/7 to diagnose and repair your engine on-site.

Call (855) 450-1212

Why Choose Our Diesel Engine Repair Services

Certified Technicians

Our ASE-certified diesel technicians receive ongoing training on the latest engine technologies and repair techniques.

Mobile Service

Our fully-equipped service vehicles bring expert engine repairs directly to your location to minimize downtime.

Quality Parts

We use OEM and high-quality aftermarket parts to ensure reliable repairs and long-lasting engine performance.

Our Diesel Engine Repair Process

1. Comprehensive Assessment

We begin with a thorough visual inspection of your engine, checking for obvious issues such as leaks, damaged components, or disconnected parts.

2. Advanced Diagnostics

Our technicians connect specialized diagnostic equipment to your engine's computer systems to retrieve error codes and performance data.

3. Detailed Quote

Based on our findings, we provide a comprehensive repair quote that includes parts, labor, and estimated completion time.

4. Expert Repair

Our certified technicians perform all necessary repairs using quality parts and following manufacturer specifications for your specific engine model.

5. Quality Control Testing

After repairs are complete, we conduct thorough testing of your engine under various operating conditions to ensure optimal performance.

Engine ECM Testing

6. Performance Verification

We verify that all engine parameters meet manufacturer specifications and that there are no remaining issues before returning your truck to service.

7. Follow-up Support

We provide complete documentation of all repairs performed and offer follow-up support to ensure continued optimal engine performance.

Serpentine Belt Replacement

Professional serpentine belt replacement service

Radiator Replacement

Expert radiator replacement for diesel engines

Customer Testimonials

When our fleet's lead truck developed a serious engine issue 200 miles from home, TruckAI sent a mobile technician immediately. They diagnosed a failed injector pump, made the repair on-site, and had us back on the road in hours instead of days. Their expertise saved us thousands in towing and lost delivery time.
Thomas R.
Thomas R.
Premier Delivery Services
Operations Manager
We've been using TruckAI's preventative maintenance program for our fleet's engines for over two years. Their thorough inspections and quality service have reduced our engine-related breakdowns by 65% and extended our engines' life. Their technicians know our Cummins engines inside and out, and always take the time to explain their findings.
Rebecca J.
Rebecca J.
Interstate Transport Co.
Fleet Director

Frequently Asked Questions

We service all major diesel engine brands used in commercial trucks, including:

  • Cummins (ISX, ISB, ISL, X15, etc.)
  • Detroit Diesel (DD13, DD15, DD16, Series 60, etc.)
  • Paccar (MX-11, MX-13)
  • Volvo (D11, D13, D16)
  • Mack (MP7, MP8, MP10)
  • International/Navistar (MaxxForce, A26)
  • Caterpillar (C7, C9, C13, C15, etc.)
  • Mercedes-Benz (OM906, OM460, etc.)
  • Isuzu, Hino, Mitsubishi, and other medium-duty truck engines

Our technicians are certified and trained on all major diesel engine platforms, with regular updates on the latest technologies and repair techniques. We maintain comprehensive diagnostic equipment and specialized tools for each engine manufacturer, ensuring accurate diagnostics and quality repairs regardless of your engine brand.

Being aware of early warning signs can help prevent catastrophic engine failures. Common indicators of diesel engine problems include:

  • Excessive Black Smoke: Often indicates incomplete fuel combustion due to injector issues, air intake restrictions, or EGR system problems.
  • Blue Smoke: Typically signals oil burning in the combustion chamber, potentially due to worn valve seals, piston rings, or turbocharger issues.
  • White Smoke: Could indicate coolant leaking into combustion chambers through a cracked head or blown head gasket.
  • Loss of Power: Gradual or sudden power reduction may signal fuel system problems, turbocharger issues, or internal engine damage.
  • Poor Fuel Economy: Significant decreases in MPG often indicate injection timing issues, fuel quality problems, or various mechanical failures.
  • Unusual Engine Noises: Knocking, rattling, or whining noises can indicate bearing wear, injector problems, or turbocharger issues.
  • Engine Warning Lights: Modern diesel engines have sophisticated monitoring systems that detect problems before they become severe.
  • Excessive Oil Consumption: May indicate worn piston rings, valve seals, or internal engine component deterioration.
  • Engine Overheating: Could signal cooling system issues, head gasket problems, or other serious engine concerns.

If you notice any of these symptoms, we recommend having your engine professionally diagnosed as soon as possible. Early intervention often means simpler, less expensive repairs and helps prevent cascading damage to multiple engine systems.

Diesel engines are designed for longevity when properly maintained. Here are essential practices to maximize your engine's service life:

  • Follow Manufacturer's Maintenance Schedule: Adhere to the recommended service intervals for oil changes, filter replacements, and system inspections.
  • Use Quality Lubricants and Fluids: Always use engine oils that meet or exceed manufacturer specifications, with the correct viscosity for your operating conditions.
  • Monitor and Change Filters Regularly: Air, fuel, and oil filters are critical to engine health and should be replaced at recommended intervals or more frequently in severe operating conditions.
  • Proper Cold Weather Practices: Use appropriate engine block heaters in freezing conditions, allow proper warm-up time, and use winter-grade fuels when necessary.
  • Maintain Cooling System: Regularly inspect for leaks, maintain proper coolant levels with the correct coolant mixture, and periodically flush the system.
  • Address Small Issues Promptly: Don't ignore minor leaks, unusual noises, or performance changes—these often signal developing problems that are easier to fix early.
  • Fuel Quality Management: Use quality fuel from reputable sources, consider periodic fuel system cleaning, and use appropriate additives as recommended for your engine.
  • Practice Good Driving Habits: Avoid excessive idling, allow proper engine warm-up, and avoid lugging the engine (running at too low RPM for the load).
  • Regular Professional Inspections: Even without apparent problems, periodic professional inspections can identify developing issues before they become serious.

Our comprehensive preventative maintenance programs are designed to implement all these best practices, with customized schedules based on your specific engine model and operating conditions. Many of our clients see their engines easily reach 1,000,000+ miles with proper maintenance.

A diesel engine overhaul is a comprehensive process that essentially rebuilds the engine to restore it to like-new condition. Here's what our engine overhaul process typically includes:

  1. Initial Assessment: Complete diagnostics and assessment of the engine's condition to determine the necessary scope of work.
  2. Engine Removal: For in-frame overhauls, the engine remains in the truck while certain components are rebuilt. For out-of-frame overhauls, the entire engine is removed from the chassis.
  3. Disassembly: The engine is carefully disassembled, with all parts organized and inspected.
  4. Cleaning: All components are thoroughly cleaned using specialized equipment to remove deposits, oil, and contaminants.
  5. Inspection: Each part is meticulously inspected for wear, damage, or deviation from specifications.
  6. Machine Work: Key components like the cylinder head, block, and crankshaft are machined to restore proper tolerances and surface finishes.
  7. Parts Replacement: Worn components are replaced with new or remanufactured parts meeting OEM specifications.
  8. Reassembly: The engine is carefully reassembled using new gaskets, seals, and fasteners, with precise torque specifications.
  9. Testing: After reassembly, the engine undergoes comprehensive testing to ensure proper operation.
  10. Installation: The overhauled engine is reinstalled in the truck with new fluids and filters.
  11. Final Verification: Road testing and performance verification ensure the engine meets all specifications.

Typical components replaced during an overhaul include piston rings, bearings, gaskets, seals, timing components, and sometimes pistons, connecting rods, and valvetrain components. Depending on condition, major components like the crankshaft, camshaft, cylinder heads, and block may be reconditioned rather than replaced.

We offer different levels of overhaul packages to meet various needs and budgets, from basic rebuilds to complete engine remanufacturing with upgraded components.

Our mobile diesel engine repair service brings expert technicians and specialized equipment directly to your location, minimizing downtime and eliminating the need to transport your truck to a shop. Here's how our process works:

  1. Initial Contact: Call our 24/7 dispatch center or submit a service request online with details about your engine issue and location.
  2. Technician Dispatch: We assign the nearest qualified diesel technician with a fully-equipped service vehicle containing diagnostic equipment, tools, and common parts.
  3. On-Site Diagnosis: Our technician arrives at your location and performs comprehensive diagnostics on your engine to identify the exact cause of the problem.
  4. Repair Quote: You receive a detailed quote for the required repairs before any work begins.
  5. On-Site Repair: Many repairs can be completed on-site, as our service vehicles are equipped with specialized tools and carry common parts for most diesel engines.
  6. Parts Procurement: If specialized parts are needed, we can quickly source them from our inventory or local suppliers.
  7. Quality Testing: After repairs are complete, we thoroughly test the engine to ensure proper operation.
  8. Documentation: We provide complete documentation of all repairs performed.

Our mobile diesel repair service can handle a wide range of repairs, from simple maintenance to complex component replacements. While some major repairs (such as complete overhauls) may require transport to our shop, approximately 80% of diesel engine repairs can be completed at your location.

For fleet customers, we offer planned mobile maintenance visits at your facility to service multiple vehicles efficiently, minimizing disruption to your operations.

Related Services

Need Diesel Engine Repair or Maintenance?

Our expert diesel technicians are available 24/7 to diagnose and repair your engine issues. One call gets our fully-equipped service vehicle dispatched to your location.

TruckAI Assistant
TruckAI Assistant:

Hello! I'm your diesel engine repair assistant. How can I help with your truck engine needs today?