From minor diesel engine repairs to full overhauls, Iron Buffalo provides expert solutions to restore performance and extend service life. You can count on us to minimize downtime for your heavy-duty commercial trucks.
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Diesel Engine Repair in Denver, CO, and Kalispell, MT
We specialize in diesel engine repair, rebuild, and overhaul services for commercial and heavy-duty trucks in Denver, CO and Kalispell, MT.
Our certified diesel technicians diagnose issues quickly and accurately, using advanced diagnostic tools to inspect components like the ECM, fuel injection system, compression, and ignition systems.
Complete Diesel Engine Service Options
Iron Buffalo delivers full-service diesel engine support—from basic repairs to complete in-frame rebuilds. Services include:
- Electronic diagnostics and fault code analysis
- Oil pan gasket and seal repairs
- Cylinder head replacement and machining
- Engine compression testing
- Timing gear and belt replacement
- Rod and main bearing replacement
- Camshaft and lifter inspection
- Piston, ring, and valve servicing
- Flywheel, clutch, and rear main seal replacement
- Full engine overhauls with OEM-spec rebuild kits
We assess the engine’s condition, recommend a tailored repair or rebuild strategy, and deliver long-lasting results designed to meet heavy-duty operating demands.
What Makes Us Different
At Iron Buffalo, our team combines mechanical precision with deep experience across a wide range of engine platforms, from Cummins to Detroit Diesel and beyond. Every rebuild or overhaul is completed to OEM specifications, with components thoroughly cleaned, inspected, and replaced as needed.
We provide both in-frame and out-of-frame rebuild options, depending on engine condition and downtime requirements. Our machine partners meet strict tolerances for cylinder reboring, head machining, and valve seating to ensure top-tier results.
Need Truck Engine Repair?
Whether you need diagnostics, repairs, or a complete engine overhaul, Iron Buffalo is ready to help. Call 303-623-7049 (Denver) or 406-890-7001 (Kalispell) to speak with a diesel engine specialist today.
FAQs
What Areas Do You Serve?
We offer 24/7 mobile repairs and roadside assistance in the following areas:
Colorado: Boulder, CO; Aurora, CO; Centennial, CO; Fort Collins, CO; Greeley, CO; Georgetown, CO; Brighton, CO; Castle Rock, CO; Colorado Springs, CO; and Longmont, CO.
Montana: Whitefish, MT; Bigfork, MT; Somers, MT; Polebridge, MT; Thompson Falls, MT; Polson, MT; Rollins, MT; Libby, MT; and Eureka, MT.
How Do I Know If My Truck Needs an Overhaul?
Signs include loss of power, excessive oil use, white or blue exhaust smoke, low compression, and consistent check engine lights. A full inspection can determine if a rebuild is needed.
Do You Use OEM Parts for Rebuilds?
Yes. We use OEM or equivalent-quality rebuild kits and components to ensure every engine meets original performance and reliability standards.
How Can I Get in Touch?
If you're ready to schedule diesel repairs, call Iron Buffalo today at 303-623-7049 (Denver) or 406-890-7001 (Kalispell).
In-House Diesel Mechanic Repairs
Workmanship & customer service are the cornerstones of our truck repair services. We proudly provide top-rated heavy-duty truck repair & maintenance services from our team of trusted diesel mechanics at Iron Buffalo Truck & Trailer in Denver, CO & Kalispell, MT. From brake and axle repairs, to transmissions and diesel engines, Iron Buffalo will get your commercial truck fixed and running smoothly again. Get in touch with us today to schedule a diesel mechanic repair service at one of our truck repair shop locations.
Customer testimonials
Light, Medium & Heavy-Duty Truck Repair Services in Denver, CO & Kalispell, MT
Trusted Diesel Repair & Fleet Services - Keeping You on the Road & Job Site
Commerce City, CO
5590 E 55th St, Commerce, City, CO
Kalispel, MT
104 Rocky Cliff Lane, Unit 1, Kalispell, MT