The most notorious problem found on LLY Duramax trucks is that they have a tendency to overheat. Part of this is attributed to their inadequate cooling system, that’s made up of the smallest radiator and fan ever found on a Duramax diesel truck.
Is the Duramax LLY a good engine?
The 2nd generation Duramax is known as the LLY. Similar to the LB7, the LLY Duramax is reliable, powerful, and lacks most of the emissions found on modern day diesel trucks like the L5P. LLY Duramax trucks don’t suffer from the same injector failure problems that LB7 trucks frequently had.
How long will a LLY Duramax last?
Redesigned Injectors Most well-maintained LLY injectors last between 150,000 to 200,000 miles.
How many miles will a 2005 Duramax last?
Overall, a properly cared for Duramax engine should last over 300,000 miles.
Does LLY Duramax have EGR?
yes lly has the egr, but blocking it is no problem.
Why do LLY head gaskets fail?
Blown head gaskets are fairly common in these earlier year trucks, as wear and tear, aftermarket tuning, and high mileage are all contributing factors to failure. The truck had started using coolant, a little at first, and then almost a quart a week.
What year is the LLY Duramax?
2004
The 6.6 liter LLY Duramax V8 engine was introduced during the 2004 model year as a replacement to the LB7 Duramax V8.
Is 2005 a good year for Duramax?
2004.5-2005.5 2500 & 3500 Instead, this generation Duramax is known for overheating issues, namely when towing heavy. Best Year(s): Any year — just be prepared for the possibility of replacing the head gaskets and facing overheating issues if you plan to tow heavy.
How do you tell if an LLY Duramax has a blown head gasket?
If your temperature gauge suddenly starts running colder than it always has, you may have a head gasket problem. The quickest and easiest way to check for combustion pressure in the coolant system is to squeeze the upper radiator hose while the truck is running.
