Diesel Repair Colorado Springs|Cummins,PowerStroke,
Duramax| Westco Automotive

## Diesel Repair in Colorado Springs – Westco Automotive

 

We perform all diesel repairs right here at our shop located at **1130 Valley Street A/B, Colorado Springs, CO 80915**.

 

From hot-shot owner-operators passing through on I-25 to local construction fleets and RV owners preparing for mountain trips, we have built a reputation for honest, knowledgeable diesel service.

 

**We service diesel vehicles from:** Colorado Springs, Fountain, Manitou Springs, Monument, Pueblo, Fort Carson, and Peterson SFB.

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## Why Local Diesel Owners Trust Westco Automotive

 

- **Factory-level scan tools** – JPRO, Ford IDS, GM GDS2, Cummins Insite
 

- **Transparent diagnostics** – We show you what we find (photos, data, TSBs)
 

- **No upsell guarantee** – We fix what's broken, not what's "recommended"
 

- **Female-led team** – Honest communication, no intimidation
 

- **Fleet and hot-shot friendly** – Quick turnaround, clear estimates

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## Book Your Diesel Service

 

Whether you need a pre-purchase inspection, emissions repair, or bulletproofing, we are ready to help.

 

📞 **Call us:** (719) 591-7743  
 

📅 **Book online:** https://www.westcoautomotive.com/book-appointment
 

📍 **Visit:** 1130 Valley Street A/B, Colorado Springs, CO 80915  
 

🕒 **Hours:** Monday–Friday, 9 AM – 5 PM

 

 

**Not sure what's wrong?** Describe your issue when you book — we will diagnose before we repair.​​​​​​

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​The Dirty Secrets Diesel Owners Need to Know

 

At Westco Automotive, we see the same failures over and over. Here is what the dealership won't warn you about.

 

 

CP4 Injection Pump Failure (Ford 6.7L, GM LML/L5P, Ram EcoDiesel)

 

 

The CP4 pump uses fuel for lubrication. One bad tank of fuel or a weak lift pump, and it sends metal shrapnel through your entire fuel system — injectors, rails, lines, tank. Repair cost: 8,000–8,000–12,000.

 

Prevention:

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• Install a lift pump (FASS or AirDog) on Ford 6.7L

• CP3 conversion kits available for LML Duramax

• Change fuel filters every 10,000 miles religiously

 

6.0L PowerStroke Bulletproofing – Worth It?

 

The 6.0L earned a terrible reputation — but it can be made reliable.

 

The fix (aka "bulletproofing"):

•  

• ARP head studs (not TTY bolts)

•  

• Upgraded EGR cooler (or delete where legal)

•  

• Improved oil cooler

•  

• Blue spring upgrade (fuel pressure)

 

Cost: $5,000–$5,000–$10,000
 

Result: A 6.0L that outlasts a 7.3L

 

Our take: If you already own a clean 6.0L truck, bulletproofing is cheaper than a new truck.

 

LB7 Duramax Injectors – The 8-Hour Job

 

The LB7 (2001–2004) has injectors under the valve covers. Replacement requires removing the intake manifold, valve covers, and fuel lines.

Symptoms of failure:

•  

• White smoke at idle

•  

• Hard start when hot

•  

• Excessive fuel in oil (dilution)

•  

• Knocking noise at idle

 

Cost: $3,500–$3,500–$7,000
 

Pro tip: Return fuel line test identifies bad injectors without removing them.

 

6.7L Cummins Grid Heater Bolt – The Time Bomb

 

Cummins 6.7L engines have a grid heater in the intake manifold. The single bolt holding the heater element can vibrate loose and fall into cylinder #6.

 

Result: Destroyed piston, cylinder head, and turbo.

 

Prevention:

•  

• Remove and re-torque the grid heater bolt with threadlocker

•  

• Install aftermarket intake heater (banks, etc.)

•  

• Check at 100,000 mile intervals

 

Our recommendation: Do this during a routine intake cleaning.

 

7.3L Power Stroke – The Million Mile Engine

 

The 7.3L (International T444E) is nearly indestructible — but has two weaknesses:

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• Cam Position Sensor (CPS) – Fails without warning, truck dies. Keep a spare in the glove box ($30).

•  

• Under-Valve Cover Harness (UVCH) – Wires burn through, injectors stop firing. Repair with OEM harness.

 

Otherwise: Change oil every 5,000 miles, and the 7.3L will outlive the truck.

 

VP44 Injection Pump

(5.9L 24V Cummins 1998–2002)

 

The VP44 is a mechanical pump controlled by a computer module mounted on top. Heat kills it. Starvation kills it.

 

Why they fail:

•  

• Weak factory lift pump (fuel pressure drops below 10 PSI)

•  

• Heat soak from engine block

•  

• Aftermarket programmers (increased rail pressure)

 

Prevention:

•  

• Install aftermarket lift pump (FASS, Air Dog, or Holley)

•  

• Keep fuel pressure above 15 PSI at all times

•  

• Avoid tuners that push VP44 beyond 50% over stock

•  

• Cost to replace: $2,500–$2,500–$5,500

 

Diesel Model Spotlights –

What We Actually See in the Shop

 

Cummins

 

Model What We Fix Most Average Cost Our Advice

 

5.9L 12V (6BT)KDP (Killer Dowel Pin), lift pump, fuel heater fires$500–1,500 Staking the KDP is cheap insurance

 

5.9L 24V (VP44)VP44 injection pump, lift pump failure $2,500–$5,500 Install a FASS pump immediately

 

5.9L Common Rail (2003–2007)Injectors (wear out every 100–150k),

dash clusters $2,000–$5,000 Best year: 2006

 

6.7L (2007+)Grid heater bolt, EGR cooler, DPF regen issues$1,000–$7,000 Delete the grid heater bolt proactively

 

PowerStroke

 

Model What We Fix Most Average Cost Our Advice

 

7.3L CPS sensor, UVCH shorts, injector o-rings$200–1,500

Keep a spare CPS in the truck

 

6.0L Head gaskets, EGR cooler, oil cooler, FICM $5,000–$10,000 (bulletproofed)Buy one already studded

 

6.4 Cracked pistons, radiator leaks, rocker arms$6,000–$15,000

Avoid this engine entirely

 

6.7L Scorpion CP4 pump failure, glow plug tips, NOx sensors $8,000–$15,000 (CP4 failure)Install disaster prevention kit

 

Duramax

 

Model What We Fix Most Average Cost Our Advice

 

LB7 (2001–2004)Injectors (under valve covers), injector cups      $3,500–7$,000 Return fuel line test first

 

LLY (2004–2005) Overheating (restrictive intake), head gaskets    $2,000–$7,000 Upgrade intake and radiator.

 

LBZ (2006–2007)Water pump, crank sensor $500–$3,500                  Most reliable — buy one if you can

 

LML (2011–2016) CP4 pump failure (less common than Ford but catastrophic)$8,000–$15,000 Convert to CP3 when CP4 fails.

 

L5P (2017+) Emissions sensors, glow plug module $1,000–$5,000      Better than LML, still expensive

 

Diesel Fuel System 101 –

Why Clean Fuel Matters

 

Diesel injection systems operate at 20,000–30,000 PSI (gas engines are 40–60 PSI). Contamination destroys them instantly.

 

Component Failure Cause Prevention

 

CP4 pump Water, air, or low pressure Lift pump, water separator, fuel additives

 

Injectors Dirty fuel, lack of lubrication Stanadyne or Hot Shot's Secret additive

 

VP44Heat + starvation Aftermarket lift pump, keep tank above 1/4

 

Common rail injectors (Cummins/Duramax)Wear (hours, not miles)Replace at 150k preventatively

 

Our fuel additive recommendation: Hot Shot's Secret Everyday Diesel Treatment (green bottle). It adds lubricity and cleans injectors.

 

Emissions Equipment

(EGR, DPF,DEF)– What You Need to Know

 

Modern diesels (2008+) have complex emissions systems that fail frequently.

 

Component Common Failure Cost Workaround

 

EGR cooler (6.0L, 6.7L Cummins)Clogs or cracks, coolant loss $1,500–3,000

 

Delete (off-road only) or upgraded cooler

 

DPF (diesel particulate filter)Clogs from short trips or bad injectors $3,000–$8,000 Forced regen or replacement

 

DEF system (SCR, NOx sensors) Crystallization, sensor failure $1,000–$7,000 Flush system, replace sensors

 

Our advice: Use your truck for highway driving regularly

(not just short trips). Diesels need to regen.

 

Pre-Purchase Diesel Inspection –

What We Check

 

Buying a used diesel? We offer pre-purchase inspections that include:

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• Relative compression test (identifies weak cylinders)

•  

• Injector contribution test (balance rates for Duramax/Cummins)

•  

• Fuel pressure test (lift pump health on Cummins)

•  

• Crankcase pressure test (worn rings — blow-by)

•  

• DPF soot load and regen history (Ford/GM via factory scan tools)

•  

• Visual inspection of grid heater bolt (6.7L Cummins)

•  

• Cooling system pressure test (EGR cooler leaks)

•  

• Turbocharger shaft play check

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Diesel Driving Habits That Extend

Engine Life

 

Do This/Avoid This

 

Let the engine idle 1–2 minutes before driving (especially cold)Shut down immediately after hard driving (turbo coking)

 

Use diesel additive every fill-up (lubricity + cetane)Run the tank below 1/4 (water condensation + sediment)

 

Change fuel filters every 10k–15k miles Ignore the "water in fuel" light

 

Drive at highway speeds weekly for regen (2008+)Short trip only — kills DPF

 

Use OEM or high-quality aftermarket filters Cheap fuel filters (destroy injection pumps)

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