Are there any problems with the Duramax LB7 diesel?

Are there any problems with the Duramax LB7 diesel?

Since the LB7 is a bit behind the performance curve compared to more modern diesel engines, performance modifications are common. Once you reach the 550rwhp mark, the LB7 is very prone to bending rods and also snapping crankshafts. Additionally, more power requires more fueling and more cooling.

How to install a Duramax LB7 fuel injector?

LB7 Duramax Injectors Parts Part # & Link Fuel Injectors Bosch 0445120008 Dieselogic LB7 Injector Injector Installation Kit Merchant Automotive LB7 Duramax Injector Injector Puller Tool OTC 6778 Fuel Injector Line Kit MA-10215

Are there any issues with the LB7 injectors?

The original injectors that came in these trucks had all sorts of issues with cracking. The symptoms are constant smoke at idle and gaining fuel in the oil. Unfortunately the best thing to do if you have this problem is to replace the whole set at once.

What kind of pump does the LB7 engine use?

The LB7 uses a 23,000psi rail along with a Bosch CP3 injection pump, also known as a high pressure fuel pump. Aside from the carbon buildup caused by DI, the fuel injectors themselves are also very common failure points, even on non-GM engines. The LB7 injectors had two potential design flaws that could cause injector failure.

Since the LB7 is a bit behind the performance curve compared to more modern diesel engines, performance modifications are common. Once you reach the 550rwhp mark, the LB7 is very prone to bending rods and also snapping crankshafts. Additionally, more power requires more fueling and more cooling.

What causes a fuel injector to fail on a LB7?

Aside from the carbon buildup caused by DI, the fuel injectors themselves are also very common failure points, even on non-GM engines. The LB7 injectors had two potential design flaws that could cause injector failure.

The LB7 uses a 23,000psi rail along with a Bosch CP3 injection pump, also known as a high pressure fuel pump. Aside from the carbon buildup caused by DI, the fuel injectors themselves are also very common failure points, even on non-GM engines. The LB7 injectors had two potential design flaws that could cause injector failure.

How to tell if your Duramax Diesel Turbo is gone?

If you can’t find the appropriate fitting, check boost at one of the vacuum ports. With the gauge connected, open the throttle and check the peak boost. All models should check in at 20 psi of boost maximum, with the rpm at about 1,800 for 2003 to 2004 LB7 motors and 1,600 for all others.

How many horsepower does a GM Duramax have?

GM was eager to develop and speed to market the 6.6-liter LB7 Duramax, which produced 235 horsepower. Later versions including the LLY, LBZ, LMM and LML would use more sophisticated turbos and engine controls, ultimately increasing both horsepower and torque by about 80 percent from 2001 to 2011.

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)

If you can’t find the appropriate fitting, check boost at one of the vacuum ports. With the gauge connected, open the throttle and check the peak boost. All models should check in at 20 psi of boost maximum, with the rpm at about 1,800 for 2003 to 2004 LB7 motors and 1,600 for all others.

GM was eager to develop and speed to market the 6.6-liter LB7 Duramax, which produced 235 horsepower. Later versions including the LLY, LBZ, LMM and LML would use more sophisticated turbos and engine controls, ultimately increasing both horsepower and torque by about 80 percent from 2001 to 2011.

Why is my Duramax LB7 engine overheating?

The second potential cause of overheating on the LB7 is a dirty radiator. Naturally over time the radiator will pick up gunk, dirt, and various other particulates. As this happens, the effectiveness of the radiator decreases which can then result in overheating as well.

What kind of banjo bolt do I need to replace my Duramax LB7?

The Alliant Fuel Return Line Banjo Bolt AP0059 is a direct replacement for your 2001-2004 GM 6.6L Duramax LB7. The factory return line bolts often become stripped or damaged during disassembly. Replacing these bolts is a good idea to avoid leaks when replacing your injectors.

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 is injector return line bolt for GM Duramax LB7?

The Merchant Automotive 10491 Injector Return Line Bolt has been specially designed for your 2001-2004 GM 6.6L Duramax LB7. This is not just a replacement bolt. Merchant Automotive has redesigned this bolt head to allow nearly double the tool engagement.

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