Question about BMW 325

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Overheating i have a 1994 325i it's overheating i changed the water pump fan cluch themostat and it still over heats the radi. seem to be ok what could it be please help

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  • mikehiltonhd Feb 06, 2009

    I am having the same problem, i have good water pump good t-stat, and no heat and the car is over heating, no water in the oil! ???????

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I think you need to do a cheap and extremely accurate test.Its called a tk head test and it determines wether you have head or head gasket problem.If you could eliminate that part as being the cause then that really only leaves a couple of things left to check.A blocked radiator or an air lock.Maybe a faulty radiator/expansion tank cap not able to maintain correct pressure

Posted on Oct 19, 2008

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What year and mileage? 1st the obvious stuff which u probably already did--thermostat installed in correct direction? (it will fit backwards, which will cause car to overheat), fan is going on when engine temp rises?, I'm not sure about BMW, but quite a few cars have a bleeder valve to remove air from the cooling system (air in system= water won't circulate properly, will overheat), radiator cap (if equipped, a lot of cars have just the overflow/add bottle, no rad. cap)check seal, replace if necessary and then the more expensive, the radiator may be plugged up with rust and sediment, which would result in poor circulation, and overheating. A rad, shop can flush it and check flow. good luck and let me know how it goes.

Posted on Oct 19, 2008

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