Bimmerfest - BMW Forums - View Single Post - Heater blow cold air and car overheat
View Single Post
Old 12-27-2012, 03:07 AM
Droptop85 Droptop85 is offline
Officially Welcomed to the 'Fest
Location: Fresno
Join Date: Oct 2011
Posts: 351
Mein Auto: 03 Z4 3.0i
It's hard to say. I would replace te thermastate and thermastate housing before replacing the water pump. Reason being it's cheaper. While the vehicle is running and at operating temp try squeezing your radiator hoses. If they they are super stiff you have built up psi. They should be squeezable while the vehicle is running and at normal operating temp. If not. Thermastate is stuck closed.
Reply With Quote