diesel engine repair & overhaul - hickory & claremont nc

At Johnston Truck Service, we specialize in professional diesel engine repair for light duty, medium duty, and semi trucks, fleet vehicles, and owner operators across Western North Carolina. From diagnostics to full engine rebuilds, our experienced technicians keep your truck on the road and your downtime minimized.

Serving Hickory, Claremont, Newton, Statesville. and surrounding areas.

Complete Diesel Engine Repair Services

We provide full-service diesel engine repair including:

  • Engine Diagnostics and troubleshooting

  • Overhead Adjustments

  • Inframe and out-of-frame rebuilds

  • Head Gasket replacement

  • Injector replacement and fuel system repair

  • Turbocharger repair and replacement

  • Oil consumption diagnosis

  • Cooling system repair

  • Engine overheating repair

  • Check engine light diagnostics

Engine Diagnostics

Advanced Engine Diagnostics

  • Loss of power

  • Engine derates

  • Fault codes

  • Fuel system problems

  • Emissions issues

Proper diagnosis saves you time and unnecessary repairs.

Modern Diesel engines require accurate diagnostics.

Our shop uses professional diagnostic equipment to quickly identify:

Why Choose Us

Why Fleets & Owner Operators Choose Johnston Truck Service

Our shop focuses on fast turnaround times, honest diagnostics, and quality repairs that last.

  • Experienced diesel technicians

  • Fleet accounts welcome

  • Commercial tires and rubber tracks available

  • Preventative maintenance services available

  • Local trusted truck repair shop

We work hard to keep your equipment running strong mile after mile.

need engine diagnostics or a complete rebuild, Johnston Truck Service is ready to help.

Call today to schedule service.

Request service online using our contact form.

Johnston Truck Service Proudly Serves:

  • Hickory NC

  • Claremont NC

  • Newton NC

  • Conover NC

  • Statesville NC

  • I-40 trucking routes

If your truck is down, call us today to get back on the road.