Hi, I'm still working on identifying the underlying cause of my overheating at idle issues.
A mechanic today suggested that it could be a broken water pump and the engine cools thermally while driving along, but can't cope at idle.
(Sounded reasonable to me) So to test the water pump without stripping down the engine, he said to disconnect the top radiator hose (& presumably the thermostat) and start the engine with the hose disconnected and pointed away from the car. If the water pump is working correctly then it should fire water out of the hose when the engine fires up?
Has anyone done this before? Should I expect to see a lot of water pumped out, or just a little bit?
I tried to find a youtube video of this being done to compare it with, but I couldn't find one...