How can you tell the difference between LB7 and lly?
How can you tell the difference between LB7 and lly?
If the 8th digit of your VIN number is a 1, then it is a LB7 Duramax (the early engine). If the 8th digit is a 2, then it is a LLY. In mid 2004, GM switched to this newer LLY engine.
What are the most common 6.6L LB7 Duramax problems?
What Are The Most Common 6.6L LB7 Duramax Problems? The LB7 Duramax engine made its debut on Chevrolet and GMC HD trucks in 2001. These diesel engines are where the Duramax started, and they have been so successful that the Duramax are still used in GM HD trucks today.
When did the Duramax LB7 diesel come out?
Duramax LB7 Specs & Info. The LB7 Duramax was first introduced for the 2001 model year as General Motors retired its 6.5L Detroit diesel.
What’s the compression ratio on a Duramax LB7?
The LB7 Duramax engine has a 17.5:1 compression ratio, and this, along with the excessive torque present when adding performance modifications places extra stress on the engine’s internals. Instead of breaking and an all-out rebuild being needed, the forged steel rods simply bend.
What kind of problems does a Duramax engine have?
The 5 Most Common LB7 Duramax Engine Problems 1 Fuel Injector Failure 2 Water Pump Failure 3 Fuel Filter Housing O-ring Leaks 4 Blown Head Gasket 5 Overheating (fan clutch problems, radiator gunk)
What Are The Most Common 6.6L LB7 Duramax Problems? The LB7 Duramax engine made its debut on Chevrolet and GMC HD trucks in 2001. These diesel engines are where the Duramax started, and they have been so successful that the Duramax are still used in GM HD trucks today.
Duramax LB7 Specs & Info. The LB7 Duramax was first introduced for the 2001 model year as General Motors retired its 6.5L Detroit diesel.
The LB7 Duramax engine has a 17.5:1 compression ratio, and this, along with the excessive torque present when adding performance modifications places extra stress on the engine’s internals. Instead of breaking and an all-out rebuild being needed, the forged steel rods simply bend.
Are there any problems with the Duramax engine?
The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants. Not specific to one version of Duramax in particular (ex: LB7, LLY, LBZ, LMM or LML), the problem exists across all generations.
