![]() If you're able, you should replace the upper and lower radiator hoses as a starting point as well.Īs mentioned by others, be very careful opening the hood after driving as burning hot coolant can spray on you. You need to solve the antifreeze puzzle fast before the engine overheats. The situation is puzzling when the coolant tank is empty, but the car is not overheating. In terms of known failures, the radiator cap is not usually the prime suspect, as I mentioned above. by Dmitry Sapko MaYou expect your car to overheat when the engine coolant runs out. The area in the engine bay underneath will be the location of your problem. A blown head gasket is a major problem for any car. However, since the car is not overheating, that means the issue has not escalated to a point where it is affecting drivability or your car’s health. The head gasket may be blown because of overheating, which could be caused by a clogged radiator or water pump. If you’re smelling antifreeze, there’s almost definitely an issue with your car. With the pump bad, there won’t be anything to circulate coolant to the radiator. Oil in your coolant can be a sign of a leaky head gasket that needs to be replaced. The cool coolant then spreads into the engine components through the engine’s pipes or passage. The water pump helps circulate coolant through the radiator tubes, where it cools. There will likely be an area that has much more splatter or looks completely soaked. Your cylinder head gasket (aka head gasket) is the part of your engine that prevents coolant or oil from leaking into one another. Yes, a bad water pump can cause coolant to bubble. To trace down the source of a busted coolant line, check the splatter pattern of the coolant, trying to ascertain where the coolant is originating from. Identifying the broken part is the first piece of the antifreeze puzzle. You may also lose the engine coolant to external leaks, a leaking heater core, and a faulty thermostat. It should have dark brown/black oil on the end, with no milkiness or opaque appearance. Antifreeze leaks are linked to faulty cooling system components, including the radiator, coolant reservoir, head gasket, and water pump. That said, to rule out any engine head gasket failure check the oil dipstick. If your coolant levels are still going down despite there being no evidence of a leak, you may have a bigger problem: an internal coolant leak. ![]() On BMW's and especially on this year radiator hoses are a known weak spot. The temp gauge is also damped, which mean it will read normal throughout a variety of operating temperatures, and only in severe overheating will it start to move.Įngine coolant splashed in the engine bay is a sure sign of a bad hose, connection, or gasket. Also, you're not going to get an accurate temp reading when there is no coolant running through the engine. You should not drive this vehicle more than is absolutely necessary because running an engine dry can cause a whole host of very expensive issues. Empty coolant will absolutely cause your engine to overheat given the opportunity. I'll first say that it is not a question of your engine not overheating at all, but rather your engine not overheating yet.
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