hi, i own a 2001 330i, and ive recently had a problem with the engine or coolant temp..which ever it is, ill drive it for a while and the temp goes up. my coolant levels are good, so i dont know what the problem is..BTW: i lost the origial oil cap and got a replacement from an autoparts, it also seem to be leaking oil from there could that be the problem? help :

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