3-Series (E46, E90)Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.
2000 323Ci coupe... recently replaced expansion tank due to huge crack. drove car few miles and overheated and coolant spilled out from bottom of car... other than retracing my steps to make sure I installed new expansion tank correctly... any advice on identifying the real problem... i'm handy but certainly no mechanic and would like to try fixing myself before towing to dealership... research suggests thermostat, water pump, head gasket... how do i identify true source of problem?? thanks!
Question: Other than the car overheating, are there any other signs when the water pump goes out? I ask this because I have an extended warranty which would probably only cover this if the part fails, but I don't want to wait for this to happen and risk losing my engine just to avoid paying this on my own. I think it's better to anticipate these type of things.
My '04 325 has about 78K. I read a buyers guided article for the E46 in Bimmer magazine that the water pump should be changed ever 60K and radiator every 90K as preventive measures. Thx!
As you say it pours out!!!,I would say you have a loose hose clip, split hose or the sensor in the exp tank is not sealing correctly. I would not have thought it would be the rad, as for the pump you would see it leaking and white crystalised water over the belts ( due to antifreeze), best thing to do,take off the the plastc under cover underneath, place a piece of cardboard under and let her just sit there on tick over, give it some revs now a then, keep checking underneath and you should see where its coming from.
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