Top-Tier Engine Repair & Replacement in Carbondale, CO

An engine issue can stall your day, your job, or your entire fleet. That’s why our team brings precision, transparency, and serious know-how to every engine we service. At JW Diesel & Automotive, we specialize in diesel diagnostics and full-scope repairs, from drivability concerns to complete replacements. With tools that match the dealership and a reputation built on doing things right, we’re here to earn your trust, one repair at a time.

When Your Engine Talks, We Listen

Your engine is the heart of your vehicle, and like any heart, it gives you signs when something’s wrong. Strange noises, reduced fuel economy, hesitation, or dashboard lights are all your truck’s way of saying, “Help.” Ignoring those signals can turn a simple repair into major damage. That’s where we come in.

Common engine symptoms we diagnose and repair:

Check engine light illumination
Engine misfires or rough idle
Knocking, ticking, or rattling noises
Poor acceleration or fuel economy
Overheating or coolant loss
Hard starting or no start
Smells from oil leaks or overheating
Smoke from the tailpipe or under the hood

If you’re unsure what’s going on, don’t guess. Bring it in. We’ll pinpoint the issue and walk you through the solution.

What Causes Engine Failure?

Major engine problems don’t happen overnight. Common causes include overheating, low oil pressure, coolant leaks, or prolonged misfires. We help identify early warning signs before they turn into major repairs.

Our Expert Engine Services, Start to Finish

At JW Diesel & Automotive, we don’t guess, we diagnose. Our team uses advanced diagnostic tools and deep mechanical expertise to uncover engine issues and deliver honest, lasting repairs. We work on diesel platforms like Cummins, Duramax, and Powerstroke, as well as gas engines, handling repairs and replacements for the engines that power your work. Here’s what we offer:

Engine Diagnostics

With OEM-grade scanners and live data tracking, we quickly identify check engine lights, drivability issues, and sensor faults. You’ll always get a clear explanation, no fluff, and a straightforward plan that gets you back on the road.

Misfire Diagnostics & Repair

Misfires cause jerking, poor fuel economy, and long-term damage. We test coils, plugs, injectors, and cylinder compression to isolate the problem and restore clean, dependable performance without unnecessary parts.

Engine Tune-Ups

Losing power or experiencing rough idling? Our tune-ups include plug replacement, ignition testing, and precise adjustments to keep your engine running smoother, stronger, and more efficiently mile after mile.

Starting & Charging Repair

Struggling to start or losing battery charge? We test and repair starters, alternators, wiring, and relays, making sure your truck fires up fast and holds power like it should every time.

Fuel System Repairs

Fuel delivery problems? We clean injectors, test pressure, replace filters, and address pump or line issues to restore mileage, throttle response, and fuel efficiency you can feel.

Exhaust System Diagnostics

Excess noise? Failed emissions test? We diagnose leaks, replace O2 sensors, and fix clogs or damaged components to reduce restrictions and get your exhaust flowing clean again.

Cooling System Repairs

Overheating is no small issue. We service or replace pumps, hoses, radiators, and thermostats to maintain optimal temps and protect your engine in both heat and altitude.

Gasket & Seal Repairs

Even small leaks can do serious damage. We find and replace worn gaskets and seals, like valve covers, timing covers, and intake gaskets, to protect internal components and fluids.

Engine Replacements

Some engines are past the point of repair. We remove your old unit and install a remanufactured or factory-matched replacement with precision and care, testing every detail for long-term reliability.

Preventive Maintenance

Preventative maintenance, like timely oil changes, coolant flushes, and fuel filter replacements, is the key to engine longevity. Ask us about customized maintenance schedules for your driving style and mileage.

Proven Engine Repair. Real Diesel Expertise.

You don’t trust just anyone with your engine. At JW Diesel & Automotive, we earn that trust with high standards, diesel know-how, and unmatched automotive services.

Certified to the Core

Ford- and ASE-certified with deep diesel expertise—our team’s training shows in every bolt we turn.

Diagnostics that Dig Deeper

We use OEM-grade tools to diagnose fast and accurately—saving you time, stress, and unnecessary repairs.

Only Quality In, Only Quality Out

We install OEM or better parts for every job, from sensors and seals to complete engine replacements.

Drop Off, Tow In, Count On

No appointment needed. Can’t drive in? Our partner Shaun’s Towing gets your truck to us safely.

Warrantied Work, Community-Focused Service

Everything we do is backed by a 12-month/12,000-mile warranty, and built with the same honesty we bring to the Carbondale community.

Backed by Warranty

We stand behind our work with a 12-month / 12,000-mile warranty on parts and labor.

JW Diesel & Automotive

Diesel strong. Fleet ready. Driven to be the best.

Restore Power. Regain Confidence. Book Your Engine Service Today.

Engine trouble can shake your trust in your vehicle, but it doesn’t have to stay that way. At JW Diesel & Automotive, we combine certified expertise, top-tier tools, and a no-nonsense approach to get your truck back to peak performance.

Stop by our shop at 794 Industry Place, Carbondale, CO 81623 or reach out by calling (970) 510-5157. or texting (970) 510-6344. We serve Carbondale, Glenwood Springs, New Castle, Grand Junction, Eagle, Aspen, and the greater Western Slope, keeping trucks strong, and drivers confident.

Driven to be the best.