Question about 1997 BMW 328
Ive found the thermostat broken, one of the arms completely snapped..Removed the part from the car, didnt fit a new one. operated the car without a thermostat..but car keeps overheating with no warm air coming into the cabin...I suspect blocked Heater Matrix or broken Water pump !
How can i tell if the water pump is knackered ? Any help would be great.
If the water pump was bad you should hear it or if the bearings were bad, then the serpentine belt would likely fall off. run the car until hot and open the cap for the radiator. If there is pressure then the pump is working. And running without a thermostat just keeps a constant flow iwth no engine temperature regulation. I would put a thermostat in and see how the heater works after that.
Posted on Dec 05, 2008
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