BMW 2002 FAQ

Edit post

Username

Subject

Message body

Font colour: Font size:

[quote="PatAllen"][quote="Ernie"]As mentioned before, clutch "judder" or "shudder" could be caused by any of the following:

loose/broken engine mounts or tranny mounts?  worn friction surfaces or friction surfaces that are contaminated with oil/grease?  worn splines on the driven shaft hub or the transmission output shaft?  worn pilot bearing in crankshaft?

[u]IF[/u] the throwout bearing is the wrong size, common sense dictates that it might prevent complete disengagement of the clutch disk.  Likewise, if your pressure plate/diaphragm has a goobered spring, finger  or whatever you care to call them, it is going to affect the smooth engagement of the clutch.  Since your throwout bearing rides on these "fingers" if one or more is worn of not even - you will feel resistance through the pedal.  This is not unlike a warped or out of balance brake rotor translating its imbalance or unevenness through the steering wheel as a "shimmy."

Sorry, my monitor is not particularly good.  But if you have burn marks on your flywheel, you would be best to resurface it.  Same with the friction disk.  YOu probably wouldn't use a blued and warped brake rotor either!

One last thing, I am not familiar with the graphite/plastic throwout bearing you describe.  The only time I think I dealt with Beetle, Dune Buggy or early Porsche.   I have had throwout bearings on Mercedes, Corvettes etc seize or loose lubrication to the point where putting one's foot on the clutch results in a grind and or a squeal and uneven engagement of the clutch.  Unfortunately, a bad throwout bearing has a bad habit of spreading to the pressure plate and also results in shortcuts in shifting .

Good luck.[/quote]
Thanks for the suggestions...

plz bear in mind that everything was totaly in perfect shape until i decided to change a noisy throw out bearing.
Engine mounts, pilot bearing,...are in perfect shape, and that still dont explain the before/after isues. Its not like if i had the engine out, or had replaced tons of parts...
So i am focusing on the clutch pack, wrong presure plate combined with a rough flywheel, since everything else hasnt been touched.

The throw out bearing is possibly perfect. Nothing to do with its "lenght" as you suggested, just like if you dont realy understand what i mean, in that it would make it unable to release completely. The clutch fully release and way beyond the friction point. The wrong feeling occur at the friction point, or before that. When i say it feeled wrong when i installed i meant that it is just more loose on the slide tube, where one would normaly put lube to ensure proper operation.

I will surely take this all apart.

thanks.[/quote]

Options
HTML is ON
BBCode is ON
Smilies are OFF

	Disable HTML in this post
	Disable BBCode in this post