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 is the best year Duramax to own?
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. On the other hand, the more modern engines add more horsepower, torque, and upgrade capability with Duramax performance parts.
What goes wrong on LML Duramax?
Early LML Duramax trucks 2011-2012 have well-documented issues with Nitrogen Oxide (NOx) sensors that are a part of this SCR system. Other issues have also occurred regarding the DEF system. Emission repairs are often expensive! Replacing the DPF alone can cost thousands of dollars!
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.
Is the LML Duramax reliable? – Related Questions
How do I know if my LML has a blown head gasket?
A simple test is to put the engine under a good load at operating temperature, then shut it down and let the engine cool off for 8 hours or more. If the upper rad hose is still firm and opening the coolant reservoir cap releases air and pressure, the head gaskets have almost certainly failed.
At what mileage do head gaskets fail?
How Long Do Head Gaskets Last? Head gaskets typically last 200,000 miles, which is considered about the lifetime of most cars. That means, if you look after your car and follow the service schedule, you should never be faced with a blown head gasket.
Do Duramax have head gasket problems?
The gaskets in all years of 6.6 Duramax pickups are a multi-layer steel style gasket. Over time as the head/block surfaces warp and the strength of the head bolts weaken, the head can lift causing combustion pressure to go directly into the coolant system. This can also occur under high horsepower/boost situations.
What years did Duramax have problems?
LB7: 2001 – 2004
However, as the first models hit the 100,000-mile mark, some issues cropped up. Injector failure was a common problem on the LB7 engines. GM even recognized the problem as they eventually corrected the original design and offered a 200,000-mile warranty on the updated Duramax parts.
Can you drive a Duramax with a blown head gasket?
Keep driving with a blown head gasket and it will inevitably lead to further car trouble. K-Seal can stop the problem in its tracks, before it’s too late. Technically you can drive with a blown head gasket, but we’d always advise against it.
What is the life expectancy of a 6.6 Duramax diesel engine?
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!
How long do LML injectors last?
The average lifespan of a diesel fuel injector is around 100,000 miles.
Should I delete my LML Duramax?
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 long can a Duramax go without an oil change?
To keep your Warranty from voiding, you will need to follow your vehicle’s manufacturer recommendations, change your vehicle’s oil before 7500 miles, or at least once a year, whichever occurs first. My manufacturer recommends changing the oil between 5,000-7,000 miles.
How often should you change filter on Allison Transmission?
Transmissions equipped with Allison highcapacity filters do not require an initial main filter change at 5000 miles/8000 km/200 hours.
How long should I leave my Duramax plugged in?
You don’t want to waste money, but at the same time, you want to make sure your vehicle starts in the morning. One thing that most can agree on is that the maximum amount of time you should leave the engine block heater plugged in for is four hours. Any more and you’re just wasting electricity.
How much does it cost to rebuild a Duramax engine?
Depending on the year and other potential issues or wishes of the customer, you could expect a range likely between $15,000 and $25,000 for Duramax engine replacement.
Is it cheaper to rebuild or buy a new engine?
If properly done, a remanufactured engine should be as good as a new engine and it should carry a warranty for a year. And generally, it should be cheaper than a fully rebuilt engine. But you need to find out exactly who is doing the rebuilding.
Is it cheaper to buy an engine or rebuild one?
Rebuilding to repair is usually cheaper than buying a new engine, too. You may save up to half of the cost of a new engine by rebuilding. However, sometimes rebuilding is not a good option. In cases where rebuilding will cost as much as a new engine, your mechanic should be upfront about those costs.
What is the most sought after Duramax engine?
Perhaps the most desired of all Duramax models are the ’06-’07 Classic body style trucks.
Is the LML the best Duramax?
Beyond emissions systems and the injection pump, the LML is the strongest Duramax engine built to date. The block, rods, and pistons on prior Duramax engines were common failure points on tuned and modified engines due to weak components. All of these items received upgrades in the LML.