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Re: Chuck it... (archive)
[ Follow Ups ] [ 3-series (E30) Message Board ] [ Msg. Board FAQ ]
Posted by HarryM on August 07, 2001 at 13:40:09:

In Reply to: Re: Chuck it... posted by Yaofeng on August 07, 2001 at 11:35:01:

I have not looked at the vibration damper very closely, but it appears to be separate from the flange. The flange must come out before the damper can be removed with its integral bolts (studs). The problem I have with it is that the 17mm nuts have to be tightened directly on the flexible disc, which would tend to turn the metal inserts in the rubber and distort it, or break apart completely if forced. The nut should always be on the flange side, so that the bolt can be held steady with another wrench while the nut is tightened. This way, the metal inserts in the rubber can not turn and damage the flexible disc. I hope I'm making sense.

On the other hand, Jason may be right too. Maybe the damper is there for something. Someone at a BMW parts place said it is there so that if the flexible disc breaks apart, it won't damage other parts around it. FWIW.


Harry M
Glendale CA
325e (86)
2002 (74)

I really did not take a close look at the flange before I put the drive train together last week and back into the car. I was more concerned about doing a good job of replacing the tranny output seal and how to seal between the serrations using loctite. To me the output flange with the center serrated hole and the three long bolts sticking out inside of it to receive the guibo IS ONE INTEGRAL UNIT.

The only way you can modify it, as I see it, is to trim the cup from its base. So you'd leave a flat circular base with three bolts for the guibo and still have the center serrated hole for the tranny output shaft. I can see the only advantage of it is you can, possibly, remove the three nuts on the guibo from the tranny side.

But why would you want to do that? You can remove the drive shaft just as easily.

I'd have a spare flange ready just in case if I were you. There may be vibration issues that you cannot foresee by trimming the flange.




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