Sometimes the radiator will only leak when it’s at ambient temperature or when it reaches running temperature, while other times, it could always leak.Īnother common cause is road debris hitting the radiator and causing a leak where the damage occurred. Temperature changes can cause the metal and plastic parts to separate, causing a leak. Due to the changing temperature of your coolant, it will expand and contract the parts of the radiator very slightly. Most BMW radiators also have plastic end tanks attached on both sides. Radiators have multiple passages of metal hoses that the coolant travels through to lower the fluid’s temperature. ![]() The radiator on your BMW sits in the front of your car, ahead of the engine, and just behind your bumper. Read below for more in-depth information on these problem areas. ![]() It could be from a failed cooling system component, faulty coolant reservoir cap, or something more severe like a failed head gasket. ![]() There are multiple places where you could be losing coolant in your BMW. The most common places for your BMW to leak coolant are the radiator, coolant reservoir cap, water pump, thermostat housing, and radiator hoses.Ĭontinue reading for problematic areas where coolant leaks on BMWs often occur and likely causes. Do you see coolant on the ground where you park your BMW? Do you smell something unusual coming from the engine compartment after a drive? Is it normal for the coolant level to keep getting lower? Is your car suffering from an overheating condition? If you are unsure if your BMW is leaking coolant, keep reading to find out how to identify the problem and what to do next.
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