![]() This means the cap can no longer hold the increasing pressure from the coolant as the temperature rises. Over time and through use, the internal spring can wear out. These reservoirs are sealed using a twist-off spring-loaded cap. Most BMW vehicles have a coolant reservoir attached in a remote location under the hood. If you are involved in a front-end collision, even a minor one with very little damage, the integrity of the radiator can become compromised and cause a leak. 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. The color typically denotes the additives.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. If it is orange, red, green or yellow, use a similar colored coolant. Mobil Frostschutz 600 Mobil Schmierstoff GmbHīottom line, use what is in your radiator. GUSOFROST LV 505 Chemische Industrielle Gesellschaft Glysantin G48-24 Engine Coolant UNICO Ltd. Addinol Antifreeze Super Addinol Lube Oil GmbHīP anti-frost X 2270A BP Schmierstoff GmbH, HamburgĬastrol ANTI-FREEZE NF Castrol International.Trade name BMW part number Container size The use of anti-freezing and anti-corrosive agents that contain nitrites and amines is no longer permissible. With the protection of the environment in mind, BMW has been filling all of its vehicles with nitrite- and amino-freeĪnti-freezing and anti-corrosive agents since mid-1986 as standard practice. ![]() E85s do not need their coolant changed on a routine basis (3-4 years) but if work is done, the below list are 'approved' by BMW.Īpproved anti-freezing and anti-corrosive agents: The additives are what make the difference. Coolant is ethylene glycol and that is the base compound and will last forever.
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