What are the most common LMM Duramax engine problems?
1 DPF system & active regeneration 2 Leaking transmission lines 3 Fueling / low fuel pressure 4 Piston / crankshaft failure 5 Allison 1000 power limitation
Why is my Duramax 6.6L engine not working?
Overtime, both of these parts are prone to normal wear and tear which can reduce fuel rail pressure. Injectors can get clogged or the fuel pump can simply weaken. As mentioned, this is most common when its hot and when towing heavy which requires the engine to work harder and therefore more fuel to be used.
When did GM start making 6.6L Duramax engines?
GM was producing 6.6L LMM Duramax engines from midway through 2007 up to 2010, so if you have a truck from one of those model years, check out this list’s tuners. What is the Outcome of Installing a Tuner in Your 6.6L LMM Duramax?
What to do if your Duramax engine is leaking?
These problems can be prevented by ensuring you are driving your Duramax on the highway enough and being cautious of not interrupting the regeneration process while its taking place. Using a fuel additive such as AMSOIL Diesel Concentrate can help the fuel burn cleaner and therefore reduce particulate build-up. 2. Leaking Transmission Lines
1 DPF system & active regeneration 2 Leaking transmission lines 3 Fueling / low fuel pressure 4 Piston / crankshaft failure 5 Allison 1000 power limitation
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.
Overtime, both of these parts are prone to normal wear and tear which can reduce fuel rail pressure. Injectors can get clogged or the fuel pump can simply weaken. As mentioned, this is most common when its hot and when towing heavy which requires the engine to work harder and therefore more fuel to be used.
These problems can be prevented by ensuring you are driving your Duramax on the highway enough and being cautious of not interrupting the regeneration process while its taking place. Using a fuel additive such as AMSOIL Diesel Concentrate can help the fuel burn cleaner and therefore reduce particulate build-up. 2. Leaking Transmission Lines
When did the LMM diesel engine come out?
Following the LBZ being phased out in mid-2007, the LMM Duramax took its place as Chevy & GMC’s diesel truck engine. Following the same 6.6L powerplant, the LMM was introduced due to continuously increasing diesel emissions regulations and lasted until 2010 when it was phased out for the LML.
Where is the DPF located on a Duramax LMM?
In order to lower particulate matter emissions by 90 percent, the LMM came equipped with a diesel particulate filter (DPF) located down stream from the diesel oxidation catalyst (DOC).
Why was the LMM added to the Duramax 6.6L?
Following the same 6.6L powerplant, the LMM was introduced due to continuously increasing diesel emissions regulations and lasted until 2010 when it was phased out for the LML. Compared to the LBZ, the LMM added active regeneration cycles to the diesel particulate filter (DPF) system.
How often does a LMM Duramax engine Regen?
The truck therefore has “regeneration cycles” which usually occur every 700 miles or as soon as the DPF accumulates 44 grams of soot. Regeneration takes approx. 40 miles of highway driving. With city driving, the exhaust usually does not get hot enough to go through a full regen process.
Following the LBZ being phased out in mid-2007, the LMM Duramax took its place as Chevy & GMC’s diesel truck engine. Following the same 6.6L powerplant, the LMM was introduced due to continuously increasing diesel emissions regulations and lasted until 2010 when it was phased out for the LML.
Are there cracked pistons in the Duramax LMM?
In the aftermarket, cracked pistons remain common thanks to the LMM’s use of the same pistons employed in the LBZ. But outside of those shortcomings, the LMM came with several upsides.