Truck Engine Conversion in Denver, CO and Kalispell, MT

Diesel Engine Conversion in Denver, CO, and Kalispell, MT

We provide full-service diesel engine conversions for heavy-duty trucks and commercial vehicles in Denver, CO and Kalispell, MT. Whether you're upgrading to a newer, emissions-compliant model or swapping for better power output, we handle the entire process.

Engine conversions are complex undertakings. Success depends on precise mechanical, electrical, and software integration. Our technicians specialize in complete conversion services that ensure full compatibility with your truck’s drivetrain, cooling, and control systems.

Professional Diesel Engine Swap Services

At Iron Buffalo, we provide complete engine conversion solutions for heavy-duty diesel trucks. Services include:

• Engine selection and application analysis
• Engine mount design and modification
• ECM and powertrain control module programming
• Transmission alignment and integration
• Custom engine harnesses and wiring solutions
• Cooling system adaptation
• Turbocharger and intake setup
• Fuel system upgrades or rerouting
• Emissions system integration and compliance testing

We help you upgrade from outdated engines or replace failed units with newer, more efficient alternatives. Whether it’s a direct replacement or a complete repower project, our technicians ensure every component is properly integrated.

What Makes Us Different

At Iron Buffalo, we approach every swap with a system-wide perspective. Our team ensures your new engine doesn’t just run—it runs better than before, with improved power, reduced emissions, and total drivetrain compatibility. Our conversion services are trusted by fleet managers and owner-operators looking for long-term reliability and powertrain modernization. We focus on durability, compliance, and seamless drivability—no cutting corners.

Need Engine Conversion?

Looking to replace or upgrade your diesel engine? Call Iron Buffalo today at 303-623-7049 (Denver) or 406-890-7001 (Kalispell). Our team will assess your needs and deliver a fully integrated diesel engine conversion tailored to your vehicle.

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 Long Does a Diesel Engine Conversion Take?

The timeline varies depending on engine type and compatibility, but most conversions are completed within 1 to 3 weeks, including fabrication, wiring, and testing.

Can You Program the ECM After a Swap?

Yes. We provide full ECM reprogramming and calibration to ensure your new engine communicates correctly with all onboard systems and complies with emissions 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).