crankshaft bearing

[jacquesw]

Hello BMW friends,

I have the following issue with my BMW 323I, 1978.
When the car is running stationary, and I press the clutch, there is a rattling noise.
Gearbox is overhold, and also a new clutch plate and pressure group. So normaly you would suspect, it is the bearing of the pressure group, but it is not.
So I think that it is the crankshaft bearing. Before I am going further, I want to ask you if you have any experiance with this?

Kind regards, Jacques (Netherlands)

[uwbuurman]

If thats the case, than it should rattle also when ideling. Sure that the pressuregroup is OK?

Oh and do post this question in the Dutch part aswell.

[PeteK]

So when the car is idling in neutral, there is no rattle? If that's the case, it doesn't sound like a crankshaft bearing.

[David Mc]

Clutch release bearing, a common problem with any car with a manual transmission and probably one of the most overlooked parts for replacement as it is not normally supplied with a clutch/pressure plate kit and is not part of the gearbox. It is component number 4 here http://www.realoem.com/bmw/enUS/showpar ... Id=21_0066. The second most overlooked part for replacement would have to be the pilot bearing in the back of the flywheel, components 2 to 6 here http://www.realoem.com/bmw/enUS/showpar ... Id=11_0289

[jacquesw]

It makes the noice when you press the clutch, if it is in gear or not.
Dutch: probleem is, alles is vervangen. Bak gereviseerd, koppeling en drukgroep en als ik de koppeling in trap bij normaal stationair lopen hoor je een lichte rammel, wat niet goed is.

[David Mc]

It is the clutch release bearing - it only operates when the clutch is pressed, whether the car is in gear or not.
Dutch: Het is het druklager - het werkt alleen wanneer de koppeling wordt ingedrukt, of de auto in de versnelling of niet.