Aside from the CP4. 2 injection pump, LML Duramax was a reliable motor that could last 300,000 to 400,000 miles when properly maintained.
What years did Duramax have problems?
LML: 2011 – 2016
The power was increased for this year to almost 400 horsepower and 765 pound-feet of torque. To get this type of power without compromising emissions, GM had to increase the fuel system pressure. Unfortunately, this led to the injection pump becoming a ticking time bomb.
How many miles will a 2012 Duramax last?
Overall, a properly cared-for Duramax engine should last over 300,000 miles. However, consumers report having Duramax’s lasting in the 500,000-mile range!
What’s wrong with the LML Duramax?
Duramax LML Reliability
The biggest concern on any LML is the CP4 internally combusting. The associated cost of this is about $10k and it’s not covered under warranty because it is caused by poor fuel.
Is the Duramax LML a good motor? – Related Questions
What year is the most desirable Duramax?
Some engines are more popular than others. For example, the pre-emissions Duramax engines made between 2001 and 2007 are highly sought-after for superior reliability.
How long do LML Duramax injectors last?
The average lifespan of a diesel fuel injector is around 100,000 miles.
How common is CP4 failure Duramax?
GM intentionally put a defectively designed CP4 fuel pump in every one of its 2011-2016 Duramax diesel trucks—and, as the court noted today, from mile one it will begin to fail. There is no fix. The only question is how much will it cost the customer? Generally the answer is in the tens of thousands of dollars.
Should I delete my Duramax LML?
Additionally, the DPF system can clog, and so on. Outside of expensive repairs these emissions systems also create a lot of backpressure in the exhaust system which is bad for the turbocharger. For both preventative maintenance and performance reasons, deleting the Duramax LML DPF system is popular.
How much HP can a LML handle?
On the plus side, the piezoelectric injectors in the LML can support more horsepower, pound-for-pound, than the ’01-’10 solenoid valve injectors can, so once you find more high-pressure fuel volume (and air in the form of a bigger turbo) the factory injectors can easily support more than 600rwhp.
Does the LML have a CP3?
S&S also offers two other versions of LML CP3 conversion kits for competition applications which don’t require after-treatment. One tuning required version for $1,780.00 MAP, and one drop-in no tuning required for $2,175.00 MAP.
What year did Duramax stop using CP4 pump?
The CP4 was standard equipment on the 2011-present Ford 6.7L Powerstroke. From 2011-2016 GM also used the CP4 in the LML & LGH Duramax engines, switching to the Denso HP4 in 2017 when the L5P was released.
Is CP3 or CP4 better?
Should one decide to “tune” the engine, a CP3 can support more horsepower than the CP4 because of the higher fuel volume it’s able to feed the injectors. The CP4. 2 is said to support fuel for only about 525 horsepower, while a CP3 can support up to 800 horsepower.
Is a 2012 Duramax a LML?
LML Duramax Specs, Background, And Information
The LML Duramax engine is actually the longest used Duramax engine in the segment so far, as it was used between 2011-2016. According to Chevrolet, the LML boasted 11% better fuel economy over the previous generation Duramax as well.
Does a 2012 Duramax have a lift pump?
The GMC and Chevy Duramax pick-up trucks do NOT have a lift pump to supply fuel to the engine. From the factory, the CP3 injection pump is the truck’s only means of getting fuel from the tank to the engine.
What transmission is in a 2012 Duramax?
Transmissions
|
Hydra-Matic 6L90 |
Allison 1000 |
| Type: |
six-speed automatic (with Vortec 6.0L) |
six-speed automatic (with Duramax 6.6L) |
| Gear ratios (:1): |
|
|
| First: |
4.03 |
3.10 |
| Second: |
2.36 |
1.81 |
What motor is in 2012 Duramax?
6.6L V-8 LML.
What year Duramax has head gasket problems?
These are both relatively common problems you might expect to deal with on the 2001-2004 LB7 Duramax, but you can rest a bit easier knowing the aftermarket has had a decade to develop and perfect the parts you need to correct it.
How many miles per gallon does a 6.6 Duramax diesel get?
This Duramax 6.6-liter V-8 gets 17 to 19 mpg on the highway.
How often do you need to put DEF in a Duramax?
The DEF tank needs to be filled once for every 3 to 4 times that you refuel with diesel fuel.
Is it worth deleting DEF?
Deleting your DEF system can help save you money. Plus, your exhaust might have a bit of a beefier growl once you’re done. DPFs are completely different. Also known as diesel particulate filters, these little buggers are exhaust filters installed in-line on your exhaust system.