![]() ![]() ![]() Another reason that coolant could be leaking from the reservoir is an improperly installed cap, it might appear to be tight, but if it was cross-threaded, it could leak as the pressure in the system rises. 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. Contact your SUBARU dealer for an inspection.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. Also, if the indicator light/warning light often blinks in RED, the electrical system may be malfunctioning. ![]() After that, have the system checked by your nearest SUBARU dealer. When the indicator light/warning light blinks in RED or illuminates in RED, safely stop the vehicle as soon as possible, and refer to the emergency steps to take in the case of engine overheating. At this time, the engine may be overheating. If the engine coolant temperature increases further, the indicator light/warning light illuminates in RED continuously. At this time, the engine is close to overheating. If the engine coolant temperature increases over the specified range, the indicator light/warning light blinks in RED. This BLUE illuminated light turns off when the engine is warmed up sufficiently. After that, this indicator light/warning light changes to BLUE and maintains illumination in BLUE. "For a system check, this indicator light/warning light illuminates in RED for approximately 2 seconds when the ignition switch is turned to the “ON” position. Knowing what they mean and what to do could save you from costly repairs. Good question - It's very important you pay attention and know what each light means on the instrument panel. ![]()
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