Question about BMW 525

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I have an old 1987 525e bmw and it has a big issue with over heating, the radiator is full, after we cleaned and bled the air out. we cleaned the thermo sensors on the radiator. still over heats. what else could it be?

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Replace thermostat and check for coolant in your oil. If coolant is found in oil, then chances are a bad head gasket.

Posted on Mar 11, 2011

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What can cause a 2.7 L 24 value to over heat when fans are working


several options
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Sounds like the thermostat has stayed closed you will need to change it as it will blow the head gasket, very common on this model.

Also when you bled it though you may have left some air in the system this would also stop the heating working, they can be a pain to bleed through keep sqeezing the water hoses as you are bleeding it through and do not bleed it from the lower part of the radiator as it will be hard to get the air out as air will stay at the top, you should bleed from the top.

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