What should I use to fix my LB7 water pump?
We recommend using ARP head studs for a high clamp load along with one of our head gasket kits to fix it. It is extremely important to have the heads surfaced flat before putting the truck back together. Water Pumps – Another issue with the LB7 Duramax is the water pump leaking.
Is the water pump on the LB7 Duramax leaking?
Water Pumps – Another issue with the LB7 Duramax is the water pump leaking. This one is fairly common and unfortunately a huge pain in the butt to change. Water will seep from the underside of the pump. Be prepared though because you will have to remove the dampner pulley to get the pump off.
Why does my 04 LB7 engine not start?
Now engine wont start anymore. Went to start my 04 LB7 this morning to let it warm up before going to work. As I shut the door and walk away, the engine died. I tried to fire it back up but it just spins over and doesnt start. The truck has 144k, has about 3.5k on new injectors installed by dealer, fuel filter was replaced around the same time.
What are the symptoms of a faulty LB7 fuel filter?
LB7 Faulty Fuel Filter Housing Symptoms 1 Fuel pump loses prime making the engine hard start 2 Low fuel rail engine codes 3 Engine misfires, shaky idling, performance issues
What are the symptoms of a LB7 water pump failure?
LB7 Water Pump Failure Symptoms 1 Coolant leaking from engine 2 Frequent overheating 3 Constant low coolant light / frequent refills 4 Noises coming from what pump 5 Radiator steaming
Now engine wont start anymore. Went to start my 04 LB7 this morning to let it warm up before going to work. As I shut the door and walk away, the engine died. I tried to fire it back up but it just spins over and doesnt start. The truck has 144k, has about 3.5k on new injectors installed by dealer, fuel filter was replaced around the same time.
Is the LB7 water pump made out of plastic?
The LB7 water pump actually has an impeller which is made out of cast-iron instead of plastic which GM switched over to around 2006 on the Duramax 6.6L engine. The water pump has a seal on the side of it which is there to hold the pressure from the spinning shaft inside of it.
What causes a water pump to fail on a Duramax?
Water pump failure is common across just about every Duramax out there. Unlike the LBZ water pump failure which is caused by the impeller being made of plastic, the LB7’s issues are caused by the coolant side seal on the water pump.