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.
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I RECENTLY PURCHASED A 99 BMW 323i. AT FIRST, IT DROVE WELL. THE NEXT DAY IT RAN HOT. I HAVE HAD A THERMOSTAT, WATER PUMP AND A BELT REPLACED ON IT, BUT IT IS STILL RUNNING HOT. THE FAN RUNS FINE ON IT. WHAT DOES THIS PROBLEM SOUND LIKE? IT IS LEAKING ANTIFREEZE ON THE DRIVER SIDE.
THE MECHANIC DID NOT BLEED THE COOLANT SYSTEM AFTER HE PUT THE PARTS ON. THEN, HE WENT BACK AND BLEED IT AND GOT THE AIR OUT.
ANY SUGGESTIONS WOULD BE HELPFUL!
THE CAR HAS 127K MILES ON IT AND IT IS AN AUTOMATIC
The fan clutch. Has it been replaced? If not, your fan may not be running as fast as it should.
It is the fan that is [viscously] coupled to the engine. Open the hood, and try to spin it with your hand. There should be some resistance. If it spins freely, then the fan clutch needs to be replaced.
When does your car overheat? All the time? WHen going fast on the road? When you sit and idle? Please tell us as much as you can.
Auto or Manual?
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It ran hot sitting still and while driving. The fan does not turn freely, and it is resistance.
It is an automatic and we have replaced the radiator cap too.
Anytime an aluminum engine overheats, I cringe. How many times has it overheated? Exactly how hot did it get? For how long?
I don't want to be the rain cloud, but blown head gaskets can easily cause overheating, and often will, for several reasons. They will often dribble/leak when the engine cools down as well. Hopefully you haven't walked into a car with major problems.
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Leaking on the driver's side, huh? I'd bet the expansion tank has cracked. The thing is hard to inspect in place and, being made of plastic, is prone to failure... my 2000 323i had such a failure.
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