Carol Stream, IL · Mon–Fri, 9am–4:30pm
(630) 520-0103 service@bigrigfixer.com
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Big Rig Fixer technician performing engine repair

Engine Repair

Keep Your Engine in Top Condition

Expert engine diagnostics and repair services to ensure your trucks and trailers run smoothly.

Get Service Call (630) 520-0103

Engine Repair Services

Our engine repair services include complete diagnostics, component replacement, and routine maintenance. We ensure your engine systems are functioning properly to keep your vehicles safe and efficient on the road.
Technician looking at a diesel engine

Advanced Engine Diagnostics

Engine diagnosis combines the driver’s report, fault information, and appropriate mechanical or electrical checks. Cummins is a core area of our longstanding engine experience. We provide independent engine service and discuss the findings before recommending repair or replacement.
Technician applying Diesel Force treatment

Foam-Based Cleaning for Internal Deposits

We also offer Diesel Force™ emissions cleaning—a no-disassembly solution that targets soot and carbon inside your EGR, turbo, and DPF systems. If you're experiencing frequent regens or reduced power, this is a great preventive service.
Learn About Diesel Force

Complete Engine Services

  • Major Overhauls

    Complete engine rebuilds and overhauls performed to factory specifications with OEM or equivalent parts.

  • Turbo Repair

    Turbocharger diagnostics, repair, and replacement services for optimal engine performance.

  • Fuel System Service

    Fuel injection system cleaning, repair, and replacement to maintain fuel efficiency.

  • Cooling System

    Radiator, water pump, and cooling system repairs to prevent engine overheating.

  • Oil System

    Oil pump, filter, and lubrication system maintenance for engine longevity.

  • Valve Adjustments

    Precise valve adjustments and timing services to optimize engine performance.

Cummins Expertise and a Clear Repair Scope

Cummins engines are a core area of Big Rig Fixer’s longstanding engine experience. We provide independent diagnostics, repair, and maintenance. Bring the engine model and serial number so the conversation is grounded in the engine actually installed in your truck.

For any engine, describe starting behavior, power changes, fluid use, leaks, and exact warnings. Diagnosis should establish what needs repair before an overhaul or replacement is selected. Discuss findings, parts choices, related work, and authorization together so the repair scope is clear.

  • Engine serial number and vehicle VIN
  • Mileage, hours, symptoms, and warnings
  • Oil/coolant service history and previous repairs
Cummins Engine Service

Plan Your Next Service Visit

Need Engine Repair for Your Fleet?

Call the shop Monday–Friday, 9:00a–4:30p, or send a service request and we’ll get back to you.

(630) 520-0103 Request Service