1990 BMW 325i Q&A
1990 BMW 325i Question: Coolant leak
My car overheats after 20 minutes in idle and it appears to leak from underneath the throttle body unit. I removed the large coolant hose that connect to the housing unit to the fire wall and it appears fine. Is there another coolant hose around that area? Is there a diagram somewhere online that shows all of the hoses for the coolant system? Thanks. - baseballpilot22
If coolant appears around the throttle body, that is where i would typically be looking. There are a couple of coolant hoses to the throttle body prone to leaking due to corrosion and worn hoses, there is also a spout at the back of the head which also leaks The car will overheat due to a few things, most likely suspects are blocked thermostats, free spinning water pumps, faulty viscous fan, faulty thermofan or fan circuit or a blocked radiator. Head gaskets can also causing uncontrollable overheating. - Chow
The low coolant light may illuminate and/or the engine may overheat as a result of a coolant leak from the water pump. The leaking pump will require replacement and the entire cooling system should...
My radiator light inidicates my coolant is low and I check and refill it with antifreeze. Within a 2 or 3 weeks the coolant needs to be refilled again. The car does not leak anything while parked...