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DIESEL SPECIALISTS · COLORADO SPRINGS
DIESEL REPAIR IN COLORADO SPRINGS
Westco is a diesel repair shop at 1130 Valley St Ste A/B in Colorado Springs. Ford Power Stroke, GM Duramax, Ram Cummins, Isuzu NPR and Mercedes Sprinter — diagnosed with factory-level scan tools and tested before we replace anything. We repair emissions systems; we never delete them.
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✓ 24-month / 24,000-mile warranty
✓ ASE-certified technicians
✓ Female-led, family-owned
What we do
DIESEL DIAGNOSTICS, SERVICE AND REPAIR
One shop for every diesel pickup, van, box truck and motorhome, from the first warning light to the finished repair.
01
Diagnostics & programming
We pull live data and factory fault codes to find the root cause of a warning light, a running problem or an electrical fault — the first time.
✓ Factory-level scan tools for engine, transmission, ABS and comfort modules
✓ Dealer-level module programming in-house, with factory software
✓ Pressure testing for hidden coolant and vacuum leaks
✓ Photo and video of every finding
02
Scheduled service
Factory maintenance intervals, with fluids and filters that meet each maker's specifications.
✓ Fuel filters and water separator service
✓ Transmission and transfer case service with the correct fluid
✓ DEF and DPF — system checks and regeneration history
✓ Coolant service — the right coolant for your engine
03
Repair
Durable mechanical repairs on the parts diesels are known to wear out.
✓ Injectors and fuel pumps — tested before they are replaced
✓ EGR and oil coolers — fixed as a system, not one part
✓ Turbochargers — shaft play, boost and actuator checks
✓ Head studs and gaskets — when the heads come off
MAKE BY MAKE
WHAT SHOULD YOU KNOW ABOUT EACH DIESEL?
Every diesel family has its known weak spots. Whether your truck has one of them takes a real inspection — these are patterns, not a diagnosis.
FORD 6.0L
Power Stroke, 2003–2007
• The oil cooler clogs first and starves the EGR cooler
• A cracked EGR cooler leaks coolant — often with no puddle
• Pressure can then push the head gaskets
• We fix the whole chain and use head studs when the heads come off
FORD 6.7L & 6.4L
Power Stroke, 2008 and newer
• 6.7L: CP4-style high-pressure fuel pump — clean fuel and filters are the best protection
• 6.4L: radiator leaks, fuel dilution and expensive repairs
• We tell you honestly what we find
FORD 7.3L
Power Stroke, 1994–2003
• Usually a durable engine
• Camshaft position sensor — sudden no-start or misfire
• Harness under the valve covers — intermittent misfire
GM LB7 & LLY
Duramax, 2001–2005
• LB7: injectors under the valve covers — hard hot starts, smoke at idle, fuel in the oil
• A return-fuel test can find a leaking injector before anything comes apart
• LLY: runs hot under load, especially towing
GM LML
Duramax, 2011–2016
• CP4-style high-pressure fuel pump
• Water, air or low supply pressure can wear it
• A failed pump can send metal through injectors, rails and lines
RAM 6.7L CUMMINS
Cummins, 2007.5 and newer
• Intake grid heater bolt can loosen and drop into the engine
• Checking and securing it is a quick job at routine service
• Some Ram diesels also use the CP4-style pump
RAM 5.9L CUMMINS
Cummins, 1989–2007
• 24-valve (1998–2002): VP44 injection pump — heat and low supply pressure are hard on it
• 12-valve: the timing cover dowel pin can back out
• A healthy lift pump and good fuel pressure help it last
Keep it healthy
What we tell diesel owners
• Change fuel filters and drain the water separator
• Never ignore the water-in-fuel light
• Let the turbo cool after hard towing
• Get it on the highway so it can regenerate
GM LBZ & LMM
Duramax, 2006–2010
• LBZ: widely regarded as one of the toughest Duramax engines, and it has no DPF
• LMM (2007.5+): the first Duramax with a DPF, so short trips load the DPF and EGR with soot
• Both use the CP3 pump, not the CP4
• We check regen history, EGR flow and injector balance rates
GM L5P
Duramax, 2017 and newer
• Uses a Denso fuel pump instead of the Bosch CP4
• Most trouble is on the emissions side: DEF quality, DEF heater and NOx sensor faults
• SCR and DEF codes can start a derate countdown, so don’t ignore the warning
• Factory-level diagnostics and module programming in-house
MERCEDES SPRINTER
Diesel vans and fleets
• Oil leaks around the oil cooler on the 3.0L V6 are a common complaint
• NOx sensor, DEF and EGR faults that put the van in limp mode
• Glow plug failures show up on cold Colorado mornings
• Factory-level module programming in-house
DIESEL QUESTIONS WE ANSWER EVERY WEEK
Straight answers from our techs
WHAT DIESELS DO YOU WORK ON?
Ford Power Stroke 7.3L, 6.0L, 6.4L and 6.7L; GM Duramax LB7, LLY, LBZ, LMM, LML and L5P; Ram Cummins 5.9L and 6.7L; Isuzu NPR gas and diesel; Mercedes Sprinter vans; and diesel motorhomes and fleet trucks.
WE SEE
Daily drivers · Hot-shot haulers · Construction fleets · RV owners
What we do
Customers come from Colorado Springs, Fountain, Security-Widefield, Monument, Manitou Springs, Falcon, Peyton, Calhan, Pueblo, Fort Carson and Peterson SFB.
Colorado Springs: Altitude, long grades and cold mornings add their own load. We service diesels with that in mind.
HOW DOES WESTCO DIAGNOSE A DIESEL?
We start with factory-level scan tools for Ford, GM and Cummins, then test before we replace anything: fuel pressure, injector balance, compression, crankcase pressure and cooling system pressure, depending on the complaint.
WE TEST
Fuel pressure · Injector balance · Crankcase pressure · Cooling system
What we do
You see what we found — photos and data — and you approve the work before we start.
Colorado Springs: Not sure what is wrong? Describe it when you book. We diagnose before we repair.
DO YOU DELETE EMISSIONS EQUIPMENT?
No. Westco does not remove or disable EGR, DPF, DEF/SCR or catalyst systems. We diagnose why they are failing and repair them.
COMMON ROOT CAUSES
Injectors · Sensors · Short-trip driving · Missed regenerations
What we do
Shopping a truck that has already been deleted? We tell you what we see and what it can mean for registration, emissions testing and resale. We’re not lawyers, so confirm the legal side with the state.
DO YOU WORK ON FLEETS AND DO DOT INSPECTIONS?
Yes. We maintain diesel pickups, vans, box trucks and Isuzu NPRs for local businesses, and we perform DOT annual inspections in-house.
FLEET WORK
Scheduled maintenance · DOT annual inspections · Box trucks and NPRs · Work vans
What we do
See our Fleet Service page for how we keep work trucks on the road.
CAN YOU HANDLE MY EXTENDED WARRANTY CLAIM?
Yes. We take down what the truck is doing, verify coverage with your provider by VIN and name, diagnose it, submit the claim, then go over the approval with you before any repair starts.
HOW IT WORKS
Your complaint · Coverage check · Diagnosis and claim · Approval, then repair
What we do
You know what is covered and what is not before we pick up a wrench.
Colorado Springs: Bring your warranty paperwork or contract number when you book.
CAN YOU INSPECT A USED DIESEL BEFORE I BUY IT?
Yes. Our pre-purchase diesel inspection can include a relative compression test, injector balance test, fuel supply pressure test, crankcase pressure check, DPF soot load and regeneration history, and a turbo shaft play check.
WE ALSO CHECK
Grid heater bolt on 6.7L Cummins · Cooling system pressure · Codes in every module · Turbo shaft play · Service history
What we do
You get photos and test results, so you know exactly what you are buying before you commit.
WHAT IS THE CP4 FUEL PUMP PROBLEM?
The Ford 6.7L, GM LML Duramax and some Ram diesels use a CP4-style high-pressure fuel pump that is lubricated by the fuel itself. Water, air or low supply pressure can wear it, and a bad failure can send metal through the injectors, rails and lines.
BEST PROTECTION
Clean fuel · Filters on schedule · Healthy supply pressure · Drain the water separator
What we do
We can talk through prevention options for your truck at your next service.
WHY IS MY 6.0L POWER STROKE LOSING COOLANT?
On many 6.0L trucks the oil cooler clogs first. That starves the EGR cooler of coolant flow, the EGR cooler can crack and leak coolant, and a pressurized cooling system can eventually push head gaskets.
WARNING SIGNS
Coolant loss, no puddle · White smoke · Residue at the degas cap · Rising oil temps
What we do
We fix the chain from the start — oil cooler, EGR cooler, coolant — and use head studs when the heads come off.
HOW CAN I MAKE MY DIESEL LAST LONGER?
Let it idle a minute or two before driving, especially when cold. After hard towing, let the turbo cool before shutting down. Change fuel filters on schedule and never ignore the water-in-fuel light.
ALSO
Highway runs to regenerate · Don’t run the tank low · Quality filters · Drain the separator
WHAT WE DO
We set a service schedule that fits how you actually use the truck — daily driving, towing or fleet work.
DIESEL REPAIR · COLORADO SPRINGS
BOOK YOUR FREE DIESEL INSPECTION
Tell us the truck, the engine and what it's doing, in your own words.
Closed right now? Book online and we'll call you back by 10 am the next business day.
Dropping off your truck? Book our Lyft valet online at least 24 hours ahead, or use our after-hours key drop.