Quote:
Originally Posted by roundle
This. Replace the cheap plastic cap. This solved a similar problem that I had with an E36.
Also, check all the coolant lines. You could have a little weeping from one of the hose connectors.
Questions: 1) Have you done your water pump? 2) Has your car ever over-heated (if yes, I would be slightly worried about cracked head or water jacket--I killed a couple of M30s in my youth due to over-heating).
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The car overheated but I parked it immediately. Replaced the water pump and thermo myself.
I just replaced the cap. Now going to replace the radiator as it seems to be leaking from the sides where plastic meets metal.
Thanks for feedback.