Pick-up
Coordinate free equipment or component pick-up when applicable.
24-Hour Rush Repair
Diesel engine repair · Fontana, CA
Diesel Engine Repair in Fontana
For Diesel Engine Repair in Fontana, the work happens under one Fontana roof at Top Notch Equipment Repair: teardown, measurement, machining and rebuild by the same crew that quotes it. Quotes and pick-up are free, and rush jobs run around the clock.
Diesel engine repair · Fontana, CA
Engine work we do every week
Equipment comes in dead and leaves working: the failure is documented, the repair is quoted from real measurements, and the machining, welding, grinding and rebuilding all happen in-house. Free pick-up and delivery keep the logistics off your crew, and rush work runs around the clock, every day of the year.
Brands we serviceCaterpillarKomatsuJohn DeereCaseBobcatKubotaCumminsPeterbiltKenworthFreightliner
Diesel Engine Repair in Fontana · Fontana, CARebuild depth, documented
The difference between a repair and a rebuild is measurement. Blocks, cranks, heads and liners are measured and the numbers shown to you with photos and video before you decide. Free pick-up and delivery when applicable; Monday–Friday 6 AM–5 PM, with the 24-hour rush line running every day of the year.
- In-frame and out-of-frame diesel rebuilds
- Cylinder head and head gasket work
- Injectors and high-pressure fuel systems
- Turbocharger diagnosis and replacement
- Aftertreatment and derate fault tracing
Our 8-step repair process
A clear path from the first call to a tested component or machine returned to work.
Inspection
Disassemble and evaluate the complete failure.
Photos & video
Document condition and findings for a clear repair conversation.
Repair quote
Define the recommended work and quote before proceeding.
Approval
Confirm scope, urgency and the practical path forward.
Manufacturing
Machine, weld, rebuild or reverse engineer required components.
Testing
Verify operation and workmanship before release.
Shipment
Return the completed component or equipment to service.
Frequently asked questions
Which diesel engines do you repair?
Cummins, Detroit, Caterpillar, PACCAR, Ford Power Stroke, and equipment diesels from Komatsu, Kubota, Yanmar, John Deere and others.
How do I know if my engine needs a rebuild or a repair?
We measure first — compression, blow-by, oil analysis where useful, and teardown findings — then quote both paths honestly when both exist.
Do you work on equipment engines as well as truck engines?
Yes — the engine bench covers truck and equipment diesels alike, with the same measure-first, documented process.
Related services
Emergency breakdown? Call the 24-hour rush line.
(949) 400-2937Schedule service or open a repair order
Request a service call.
Tell us the make, model, symptoms, where the machine sits and how urgent it is. Your details open as a text to the shop, ready for you to review before you send.