Quick Answer

Question: Is the LMM Duramax a good engine?

Consistent to its very similar LBZ counterpart, the LMM is a highly reliable engine. The DPF is a hot-spot for failure so beware that you will probably end up with a few thousand dollars of DPF/emissions repairs, however you can *illegaly* remove this potential problem by removing the DPF system.

What does LMM Duramax mean?

The LMM Duramax refers to Chevrolet Silverado HD and GM Sierra HD trucks equipped with the 6.6L Duramax diesel engine between the years of 2007.5-2010. It was very similar to the LBZ, but it featured an all-new emissions device, a diesel particulate filter.

How many miles will a LMM Duramax last?

The Duramax engine should last up to 300,000 miles before needing major repairs if you are wondering how long it will last. The number of miles an engine can run depends on how well it was maintained and driven over its lifetime.

What problems does the LMM Duramax have?

What are the problems that the LMM Duramax has? In short, the most common problems with LMM Duramax are low fuel pressure, crankshaft and piston failure, Allison 100 transmission issues, leaking transmission lines as well as PDF system, and active regeneration.

What’s better LMM or LBZ?

LBZ does not have DPF so no urea tank to fill. LMM does have DPF. Thats the main big difference other than the body style change. DPF kills the mileage and performace on the LMM, but you can delete the dpf which is illegal but if you know someone that will pass it for inspection you will be fine.

Is LMM or LML better?

LML is arguably a better engine but there are issues with DEF on all makes
Ford, Ram and GM. LMM emission controls have proved to be as reliable as any.

Will a LML turbo fit a LMM?

No. Mounting/clearance is a little different. Also you would need to use a LML downpipe since the LML charger has a 45* exit on the exhaust/turbine side.

How much HP can a stock LMM handle?

A Dyno-Proven, 500-Plus HP

In best-case scenarios, the LMM’s stock turbo, injectors and CP3 high-pressure fuel pump can support 530 to 540rwhp.

What size turbo does a LMM Duramax have?

61. xx its very close to 62mm.

Is 2008 Duramax a good year?

Quick Answer: Avoid Duramax Year Models 2001-2010

The Duramax has a long history. We recommend avoiding any GM vehicle that comes equipped with the 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, and 2010 Duramax engines. In short, the newer model years show improved performance.

What year Duramax is most reliable?

#1 Best Year: 2007 Duramax

The engine was built to handle heavy-duty driving and could endure a lot. It was extremely reliable and efficient too, as it gave MPGs of 16 in the city and 22 on highways, which is great when considering the discussion about a pickup truck.

What years did Duramax have problems?

Premature injector failure was a critical problem for the 2001 to 2004 model year LB7 Duramax. A recall was issued by GM and injectors were replaced with a revised design that also came with an extended 7 year, 200,000 mile warranty.

How many miles will a 2008 6.6 Duramax last?

The Duramax™ 6.6L V8 Turbo Diesel Engine is sold with a warranty of 100,000 miles/160,000 kilometers. The Duramax™ has been tested to survive upwards of 200,000 miles/320,000 kilometers.

How much horsepower does a LMM Duramax have?

6.6L LMM Duramax Specs

Engine Family: 6.6L Duramax diesel (Duramax 6600)
Peak Horsepower: Kodiak/TopKick w/ LRX power option 300 hp @ 3,000 rpm
Kodiak/TopKick w/ LYE power option 330 hp @ 3,000 rpm
Peak Torque: Silverado/Sierra 660 lb-ft @ 1,600 rpm
Express/Savana 460 lb-ft @ 1,600 rpm

Does the LMM have a CP4?

The CP4 comes stock on the LML engines. All other models have a CP3, which so far has proven to be much more reliable. I dont think you can swap a CP4 into a LMM, LBZ, LLY, LB7, nor do i see why you would want to.

What year is the LMM?

2007 – 2010

Engine RPO Code Year In Production Cylinder Head Material
LMM 2007 – 2010 Cast aluminum
LGH 2010 – 2017 Cast aluminum
LML 2011 – 2016 Cast aluminum
XLD25 2011 – Present Cast aluminum

What year is the LMM Duramax?

Duramax LMM (2008-2010)

When the Silverado HD and Sierra HD were redesigned for the 2008 model year, they came with a new diesel engine option, the Duramax LMM.

How do I know if my Duramax is LMM?

Duramax LBZ &amp
LMM – WHAT’S THE DIFFERENCE? by Duramaxtuner …

Does LMM Duramax need a lift pump?

Registered. Every Duramax needs a lift pump, period.

How often does an LMM Regen?

However, the fuel required to perform an active regeneration cycle (which occurs about once every fillup or roughly every 400 miles traveled) is the primary reason why the LMM-powered trucks took a hit in fuel economy.

Is LBZ and LMM the same?

Both are basically the same engine, the LMM just has more emissions systems than the LBZ. but besides the injectors, everything else engine wise is basically identical. i would pick the LBZ due to less emissions stuff.

Will a LMM turbo fit on a lly?

Yes it will. May have to swap the vein sensor over.

How much HP can a LML handle?

In stock form it can support 520-550 RWHP with the help of a lift pump. For 600HP you simply need more pump. The Exergy Stroker Cp4 or the ATS add a pump kit can both get you to your goal. There is even a Cp3 conversion from SS Diesel that still supports the 9th injector and is CARB certified.

How much power can a L5P handle?

For reference, the 6.6L V8 L5P Duramax engine is rated at 445 horsepower at 2,800 rpm and 910 pound-feet of torque at 1,600 rpm from the factory.

How much boost can a stock LMM take?

32psi max for reliability.

How much boost can a stock LMM Duramax handle?

The LMM turbo will handle right around 38 or so without issue.

Will a LBZ ECM work on a LMM?

The LBZ engine will work with the LMM ECM &amp
harness
.

What size turbo is on a L5P?

L5P 17-22 RDS 64MM Duramax Turbocharger Tow

The RDS L5P 64MM is a great upgrade on the 2017-2022 trucks. Below are some of the features of this unit: 64mm 6 blade billet compressor wheel
10 blade “stock size” turbine 100% factory…

What Turbo does LBZ have?

GM 6.6 Liter LBZ V-8 Duramax Turbo Diesel Engine

Type 6.6L V-8 Turbo-Diesel
Maximum Powered Speed 3250 rpm
Emissions Controls Exhaust Gas Recirculation (EGR), Diesel Oxidation Catalyst (DOC)
Block Cast iron w/ deep skirt
Cylinder Head Cast aluminum

How big is a stock LLY Turbo?

One benefit for horsepower junkies is that the LLY made use of the largest turbo ever offered on any Duramax engine. Not only was its 62mm, 11-blade compressor wheel inducer the biggest, but the height of its exhaust vanes were the tallest at 15mm (vs. 11.2mm on the LML engine available from ’11-’16).