Core Repair · Craig, CO
Engine Repair in Craig, CO
From a stubborn check engine light to a full rebuild, we diagnose the real problem and fix it once, so your engine goes the distance.
Average rating
Google reviews
Years, since 1985
Mile warranty
Quick answer
What are the signs my engine needs repair?
Watch for knocking or ticking noises, blue or white exhaust smoke, overheating, oil leaks, loss of power, or a check engine light. Catching these early often means a smaller repair. We test thoroughly before recommending major work, so you never pay for parts you do not need.
What's included
- Full engine diagnosis and computer testing
- Compression, leak-down, and cooling pressure tests
- Timing, cooling, and oil-leak repair
- Head gasket and major component work
- Check engine light diagnosis
- Engine replacement and rebuilds when needed
How we find the real problem before opening an engine
Engine work is where guessing gets expensive, so we do not guess. A computer scan and live data show what the engine's own sensors are reporting; compression and leak-down testing tell us the mechanical health of each cylinder; a cooling-system pressure test finds leaks before they become head damage.
The oil tells its own story too. Metal in the oil, coolant in the oil, or oil that disappears between changes each point to a different problem, and each gets confirmed with a specific test rather than an assumption.
Once we know the actual cause, you get a plain-English explanation and a written estimate. Major engine work never starts on a hunch.
Repair, rebuild, or replace: the honest math
Caught early, most engine problems are repairs, not rebuilds: a leaking gasket, a worn belt, a failing sensor, a cooling fix. This is why we push early diagnosis; the same symptom costs far less in month one than in month six.
When the damage is internal, we lay out the real options. A rebuild makes sense on a truck with a solid body and frame that you plan to keep working; a replacement engine can make sense when a rebuild would cost more than the vehicle justifies. We put the numbers for your specific vehicle side by side and let you decide.
Whichever way you go, qualifying work carries the shop's 5-year / 50,000-mile parts-and-labor coverage.
Built for the Yampa Valley
Altitude and hard winters work engines harder here. We keep daily drivers and work trucks running strong through cold starts and mountain miles.
Why Chapman's for this
- Free digital inspection with photos
- Transparent pricing, quoted before we start
- Loaner cars, shuttle & pickup
- 5yr / 50,000-mile warranty
What customers say
“Our brakes went out suddenly while we were in town and Chapman's took care of us! We requested some extra work while we were there, which included ordering some specialty parts. They were as fast as they could have been when squeezing us in last minute, and courteous as the day is long. Excellent customer service, keeping us as up to date as possible, not doing work until we approved it, and providing a loaner as we are not local and our truck is our only transport. Our truck is now in tip top shape and worthy to pull our rig again. Highly recommend this shop! Thank you Chapman's!”
Willow W.
a month ago
“Full clutch kit replacement at a great price. Professional from start to finish.”
Morgan
Verified customer
Frequently asked questions
Often yes, especially on a truck with an otherwise solid body and frame. We give you an honest comparison of repair, rebuild, or replace so you can make the right call for your budget.
Usually a coolant leak, a failing thermostat, a bad water pump, or a radiator issue. We pressure-test the cooling system to find the real cause before it warps a head.
Yes. AAA lists low oil among the causes of engine overheating: oil is what lets pistons and valves move without friction, and too little of it raises engine temperature and accelerates wear. If your engine uses oil between changes, have it checked rather than just topping it off.
Ticking is often valvetrain or low oil; a deep knock can mean bearing wear, which is serious. Either way, keep driving gently and get it tested soon. Catching a noise early is frequently the difference between a repair and a rebuild.
White exhaust smoke, coolant loss with no visible leak, milky oil, or repeated overheating are the classic signs. We confirm with pressure and combustion testing before recommending the job, because those symptoms can have cheaper causes too.
Not necessarily; the light points to a system, not a part. We read the codes and test what they point to. If it is engine-mechanical, you will know exactly what and why before any work begins. See our diagnostics service for how that works.
Yes. Cummins, Power Stroke, and Duramax work is a core part of the shop, from injectors and turbos through major engine repair. Diesel trucks that tow hard around the valley get worked on by people who understand that duty cycle.
It depends entirely on the job, and we tell you the expected time along with the written estimate before anything starts. On longer repairs, a free loaner car means your week does not stop while the engine is apart.
Yes. Qualifying engine work is covered for 5 years or 50,000 miles, parts and labor. On a repair this size, how long the shop stays accountable matters as much as the price, and ours stays accountable longer than most.
Page last reviewed August 27, 2026.
Sources: AAA: the eight causes of engine overheating, including low oil
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