I have a 2005 cooper. I don;t know what the name of the part is, but I'll try to describe it as best as possible. The plastic piece where the water cap goes. It's attached to the head, and its the juction to the water return and heater hoses. Thanks in advance for your help. I also belive the thermestat is between the plastic piece and the head, but I don't have the manual yet to be sure.

-G

 

Is it in these photos somewhere?

 

Part No. 10 in the diagram ? http://www.realoem.com/bmw/showparts...99&hg=11&fg=35

Looks like:

# 10 - Thermostat housing - part #111537829959 - $24.56
only in conjunction -with new -Thermostat with gasket 90,5 CEL - part # 111537596787 - $33.64

 

Thanks guys! You're the best. I just ordered my parts.