Are there any Duramax engine injector issues?

LLY, LBZ, LMM: Injector issues with these engines seem to be few and far between and service is definitely much easier. What we have been seeing though is that trucks with 130k or so are starting to come up with P0087 limp mode when towing especially when hot. See my related Tech Tip Duramax LBZ and LMM P0087 low fuel pressure code.

Where is the CP3 injection pump in a Duramax?

The CP3 injection pump sits in the valley of the engine between the cylinder heads and is driven by the camshaft gear, and it has two main jobs: get fuel from the tank up to the engine, and pressurize the fuel to 26,000psi and ultimately inject it into the engine.

What should I do about my Duramax fuel system?

Three keys to doing all you can for your Duramax fuel system: 1) Clean, water free fuel:Additional filtration is mandatory. Fueling at a high volume stop only assures one thing. That you get the same fuel that countless others getting. Could be dirty, less likely to be stale, could have water etc.

Why is LB7 injector failure a common problem?

We know today LB7 injector failure is a common problem, and because the operating tolerances inside the fuel system are so tight, proper lubrication from the diesel fuel is critical.

What is the year Duramax has injector problems?

What year Duramax has injector problems? The LB7 Duramax built from 2001 – 2004.5 is known for injector failure. The good news is the replacement injectors you purchase from us incorporate several updates to help prevent repeat failures. How many injectors does a 6.6L Duramax have?

How to replace a Duramax LB7 diesel injector?

Bosch remanufactured diesel injector to restore performance to your 2001-2004 Chevrolet 6.6l Duramax LB7. Part number Bosch 0 986 435 502.

Why are my injectors on my LB7 not working?

LB7 injectors using Bosch common rail technology operate at very high pressure. Poor quality fuel will cause premature injector failure. The process changes from model year to model year and is complex enough that we recommend purchasing a service manual if you are attempting this job yourself. How much does it cost to replace injectors on LB7?

Are there any problems with the LLY Duramax?

In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring.

When to change the oil on a Duramax?

Always follow the severe duty maintenance schedule if you’re driving conditions include: 10,000 miles or when “change engine oil” message is displayed by the oil life monitoring system Check filter condition every oil change and replace as necessary; replace at 45,000 miles regardless

How often do you change the INT filter on a 6 speed Duramax?

Replace external filter at 45,000 mile intervals and full service at 97,500 miles under normal conditions. Perform full service (new fluid, ext & int filter) every 45,000 miles under severe duty conditions. Replace manual transmission fluid. GM advises that the ZF S6-650 6 speed manual transmission does not require service.

What causes the injector on a Duramax to fail?

The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat. The solenoid style Bosch units found in the LB7 employed a non-hardened internal ball seat to seal the injector.

What are the problems with the Duramax LB7?

One thing the ’01-’04 LB7 Duramax is notorious for is injector failure. The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat.

Are there any Duramax engine injector issues?