Bad Water Pump?

[julielewis]

My 1989 520i Bmw is overheating. It is possible that the water pump is bad because I have changed head gasket, cylinder head and thermostat. I flushed the radiator and all other hoses are intact. The fan clutch is relatively new. Is there any test that I could get done to check whether or not the water pump is working properly?

[yaofeng]

Evidence of coolant leak? Air bled?

[winfred]

if it's not leaking and the bearing is not worn and loose the pump is doing it's job, the later twin cam 325/525 had a pump that could cause overheating but the old m20 motor didn't have that problem, air in the system, a collapsed radiator, a bad fan clutch, a bad thermostat or a blown head gasket adding air to the system is the common problems