Re: Clutch machining noise

[thescirocco@juno.com]

On Sun, 18 Jun 2000 22:33:48 -0400 Brett Van Sprewenburg
<brett@netacc.net> writes:
> 
> 
> After I took my car out of storage this year, when I depressed the 
> clutch it made a whining/metal machining type noise.  I also noticed 
> increased pedal free play.  I tightened up the cable, which helped full

> engagement and free play.  And when the car warmed up, the noise mostly
went 
> away.
> Since I have come back from Cincy, the car has not left the garage 
> so it's been sitting a while.  I started it up today to (literally)
blow the
> cobwebs off of it, and when I depressed the clutch pedal, the 
> machining noise was back with a vengeance.  It seemed to change a bit
(lessen) 
> as the car warmed up but never went away.  The machining noise 
> frequency increased with RPM while the clutch was depressed, and the
intensity
> level (severity) of the noise increased the further I pushed the
> clutch pedal.  It makes the noise as soon as the free play is taken
> up and the slightest pressure is applied where resistance is _just_
> beginning.
> 
> Here's what I did and what I think:
> 
> I pulled the 5th gear end cap, and pulled the pushrod.  The pressure 
> plate end is very FLAT and somewhat more pointed then the other.  From 
> memory of other pushrods, both ends are supposed to look
similar...these 
> ends are quite different from eachother.  I have a Sachs sport pressure
plate 
> and HD 2L clutch, so my engagement effort is rather high...so the 
> flatening of that end I can understand somewhat...but the slight
pointedness? 
> Hmmm.
> I'll take some pictures of each end and post the URLs if required.
> 
> I also inspected the pushrod end bearing (in the 5th gear housing)
> and it rattles when I shake it...sounds blown.  This is probably my
> noise...and takers on that bet?
> 
> Thoughts on this?

Even new release bearings rattle a little, they are really cheap and
while it's apart, 
I'd swap in another pushrod, replace the release bearing, and cross my
fingers...

Something similar happened to an '89 GTI 2.0L 16V after I drove the car.
8^(

When you push the clutch in it makes a rotational groaning sound, right
at the end of the pedal.
I gave him a release bearing, because he didn't remember if he replaced
it...

He pulls the tranny and discovers several loose flywheel bolts, just
tightens them up and re-installs the trans.
When I told him that it was most likely flywheel/clutch related...

In his case, having the loose flywheel bolts could definitely warp the
flywheel, causing it to not catch evenly.

How loud is the machining noise? 

Peter
'79 Scirocco 16V project car
'83 GTI 
'84 Scirocco, '80 Scirocco, '88 Scirocco 16V

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