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      08-01-2023, 01:25 AM   #50
jagus
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Drives: M3F80 - 135i N54 - 2x328ie36
Join Date: Dec 2022
Location: Switzerland

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Quote:
Originally Posted by tomlong View Post
That gauge in the instrument cluster does not measure your motor oil temperature. It measures your coolant/engine temperature.

Reason why I know is because my coolant thermostat was stuck open and that gauge in our instrument cluster never moved to the right at all. Effectively with it stuck open, the coolant flow never stopped and was over cooling the car which never allowed it to fully warmed up. Causing poor gas mileage and bogging. But yes, better than being stuck closed, which would result in overheating, as some shops told you.
Hello !

Could you please advise on how to replace the thermostat ? I think that my coolant thermostat is failing and I would like to replace the waterpump and the thermostat together.

Do you know if the fan should be removed first ? I had to remove it once, and it was quite a mess... Thus, I would like to know if there is enough room to remove the water pump + thermostat keeping the fan in place.

Thanks for your help !
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