Some really crazy things happened today.!!! I am PANIC... right now
Instead of adding the coolant into tank (1), my friend who claimed he is an expert of bmw added those coolant into tank (2). ---- After reading article from the internet, i find out that coolant shall be add into tank (1).
I am wondering what will happen next? I have driven the car for another 30 minute after my friend added those coolant into the tank (2), it just seems fine.
Dont actually know myself, it does have a caution and read the manual marking on it.
Its not engine oil and no.1 is the right one for the coolant.
Did it look like it might contain oil or water when you took the cap off? was it pressurised?
Must be an early Gen 1 car?
As said, No.2 in your picture is the coolant system pressure cap which on the R50 Cooper and One is on top of the thermostat housing. (See diagram link below 11 and 10). It is ok to add coolant here but easier to add it to the unpressurised expansion tank for top ups, where the max/min level is visible on the tank. RealOEM.com BMW R50 Cooper Waterpump - Thermostat
(They still call it a 'radiator cap' even though it is no longer on the radiator of most modern cars.......)
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