Truck repair services

Truck & Trailer Engine Repair, Rebuild & Conversion Services by Merx

Proudly serving Melrose park, Schaumburg, & Channahon, IL; Altoona & Cumming, IA; & Garland, TX

Merx offers comprehensive engine repair, rebuild, and conversion services to keep your fleet operating at peak performance. Our expert technicians use advanced techniques to ensure high-quality results tailored to your fleet's needs.

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The Science of Diesel Engines: A Comprehensive Guide to Our Services

Diesel engines are complex machines that require specialized knowledge and expertise for proper maintenance and repair. At Merx, our skilled technicians are well-versed in the science of diesel engines and are equipped to handle a wide range of services, including engine repair, rebuild, and conversion. We work diligently to diagnose and address any issues, ensuring the longevity and performance of your fleet's engines.

Engine Repair vs. Rebuild vs. Conversion: Understanding Your Options

When it comes to addressing engine issues, you have several options to choose from:

  • Engine Repair: This involves fixing specific components of the engine, such as gaskets, seals, or bearings, to restore optimal performance.
  • Engine Rebuild: A more comprehensive approach, rebuilding an engine involves disassembling, inspecting, and repairing or replacing components as needed. This is often a cost-effective alternative to a complete engine replacement.
  • Engine Conversion: This process involves modifying the existing engine to accommodate a different fuel type or upgrading the engine's performance. This option is available at our Schaumburg location only.

Advanced Techniques for Engine Repair, Rebuild & Conversion: How We Ensure High-Quality Results

At Merx, our technicians utilize state-of-the-art equipment and advanced techniques to provide the highest quality engine services. We adhere to industry best practices and stringent safety standards to deliver reliable, long-lasting results for your fleet.

The Top 5 Signs Your Fleet Needs Engine Repair, Rebuild or Conversion Services

Pay attention to these signs indicating that your fleet may require engine services:

  1. Loss of power or poor fuel efficiency
  2. Excessive smoke or emissions
  3. Unusual noises, such as knocking or rattling
  4. Frequent overheating or coolant leaks
  5. Persistent check engine light or fault codes

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Trust Merx for all your engine repair, rebuild, and conversion needs. Our knowledgeable technicians and commitment to quality make us the ideal choice for maintaining your fleet's performance. Contact us today to learn more about our services or to schedule an appointment at one of our convenient locations.

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Heavy-Duty Truck Repair Services

Merx Truck & Trailer proudly keeps America moving. With top-rated heavy-duty truck & fleet repair services, and multiple locations throughout Illinois, Iowa, & Texas, we strive to provide an experience unmatched in the diesel repair industry. Our state-of-the-art truck repair shops are capable of providing a wide range of truck repairs, including axles, brakes, transmissions, suspension, diesel engines, & more. You name it, we fix it. Find the Merx location nearest you and schedule the services you require today!

Axle Repair

Our skilled technicians utilize advanced techniques to deliver high-quality results for all your axle repair needs.

Body Work

Our skilled technicians utilize advanced techniques to deliver exceptional results for all your body work needs.

Brake Repair

Our skilled technicians utilize advanced techniques to deliver high-quality results for all your brake repair needs.

Coolant System Repair

Our skilled technicians ensure high-quality results, addressing any coolant system issues that may arise.

Diagnostics & Electrical Repair

Our expert technicians provide comprehensive solutions for your vehicles' diagnostic and electrical needs.

Driveline Repair

Our comprehensive driveline repair services encompass meticulous inspections, accurate diagnostics, and effective repairs or replacements as needed.


Merx offers comprehensive EGR and DPF repair services to maintain your fleet's performance and compliance with environmental regulations.

Engine Repair, Rebuild & Conversion

Our expert technicians use advanced techniques to ensure high-quality results.

Express Lube

Our efficient and convenient oil change services ensure your fleet's longevity and efficiency, making us your go-to choice for maintaining your vehicles.

Exhaust System Repair

Our skilled technicians use advanced techniques to diagnose and repair exhaust system issues, ensuring your fleet's reliable operation.

HVAC System Repair

Our technicians diagnose and repair issues using advanced techniques, ensuring high-quality results for your fleet's heating, ventilation, and air conditioning.

Oil & Fluid

Our skilled technicians use advanced techniques to ensure optimal performance, keeping your vehicles on the road and your business running smoothly.

Suspension Repair

Our skilled technicians use advanced techniques to diagnose and repair suspension issues, keeping your vehicles running smoothly and reliably.

Tire Repair

Our experienced technicians use high-quality materials to maintain and repair your fleet's tires, keeping your vehicles on the road and operating at their best.

Transmission & Clutch Repair

At Merx, we understand that maintaining the optimal performance of your fleet is crucial for business success.


We understand that proper truck and trailer alignment is essential for maintaining the safety and performance of your fleet.

Best shop in Illinois! Very ethical team, no hidden charges and lies. Ask for Filip, he takes care of your issues. They do everything, from paint job to overhaul of engines. Luis is great!
SIP Logistics
5 star review

"Great service! Got me in for a water pump replacement on short notice and had me back on the road in a few hours. Very professional staff and a nice clean facility with a comfortable waiting room."

Anthony Cummings

5 star review

"Fast, friendly same day service! Tractor and APU PM, trailer tire change and reefer maintenance in less than 3.5 hours 💪 IG @the_happy_trucker 🚛💨💨"

5 star review

"The best service in Chicago! These guys have real mechanics that know their stuff and they carry a lot of parts for Volvo. Cheap fast, and good service. This is my favorite shop."