How do I know if water pump is bad?

Five Signs Your Water Pump Is Failing

Overheating. A dead or dying water pump cannot circulate coolant through your vehicle’s engine and, as such, the engine will overheat.
Coolant Leaks. Coolant leaks from the water pump are common and a clear sign that it’s time to replace the pump.
Corroded Water Pump.
Whining Noises.

Is the water pump on my 2001 GMC LB7 Duramax leaking?

The water pump on my 2001 GMC LB7 Duramax had been leaking for some time – we’ll discuss the exact symptoms in a moment. I knew the pump had to be replaced, so I began accumulating the information I needed to do the job correctly. I wanted to know what parts were preferred and which ones should be avoided.

Why is my Duramax water pump leaking coolant?

The water pump’s coolant-side seal is there to contain this pressure against a spinning shaft. Over time, this seal will wear until it begins to leak coolant. That’s your cue for a need to install a new pump.

What causes a Duramax crankcase to leak fuel?

The ball seat can deteriorate over time, resulting in an incomplete seal, and ultimately, injector leaking. Both of these issues result in fuel leaking from the injector which can then enter the crankcase. This can lead to more serious problems, as diesel fuel doesn’t offer the same lubrication properties as oil.

What are the common problems with 6.6L Duramax?

9 Common 6.6L LB7 Duramax Problems. 1 1. LB7 Duramax Injectors. The most notorious LB7 Duramax problem is their original injectors. Even GM acknowledged their problems when they corrected 2 2. Lack Of A Fuel Lift Pump. 3 3. Fuel Filter Housing O-Ring Leaks. 4 4. Water Pump Failures. 5 5. Overheating.

Is the LBZ Duramax water pump prone to leaking?

Unlike the LBZ Duramax, the LB7 Duramax water pump is prone to leaking, not outright failure. The OEM water pump uses an iron impeller which makes it much more durable than the plastic impeller used on newer models. Instead, over time the seals can deteriorate resulting in lower coolant levels because of coolant loss.

What should the pressure be on a Duramax water pump?

Normal cooling system pressure is in the range of 8-10 psi. The water pump’s coolant-side seal is there to contain this pressure against a spinning shaft. Over time, this seal will wear until it begins to leak coolant. That’s your cue for a need to install a new pump.