Clutch Rattle
07-04-2010 | 09:24 PM
#46
Nordschleife Master
Joined: Jun 2006
Posts: 6,286
Likes: 56
From: ɹəpun uʍop 'ʎəupʎs
Once again I'm amazed by the mass of knowledge that is accumulated in this forum. 
I had the same issue as the OP after I put the clutch back together in my 90 GT. The clutch fork seemed to have excessive back-to-forward free play and rattled somewhat unless I preloaded it by pressing clutch pedal. I was afraid that I had to tear it down again, but after reading the above post I'm pretty sure that I just have bad slave cylinder - it does not preload the arm correctly.
I had the same issue as the OP after I put the clutch back together in my 90 GT. The clutch fork seemed to have excessive back-to-forward free play and rattled somewhat unless I preloaded it by pressing clutch pedal. I was afraid that I had to tear it down again, but after reading the above post I'm pretty sure that I just have bad slave cylinder - it does not preload the arm correctly.
Instructions are in the workshop manual.. page 30-1
I had a problem with the clutch in my '89 - turns out there was too much preload and it wasn't quite opening the return port in the master. Adjusting preload correctly, then the helper spring, gives the clutch a really nice light action.
07-05-2010 | 08:21 AM
#47
Racer
Joined: Apr 2009
Posts: 497
Likes: 0
From: The Evil Empire.
Although it looks like I will have to tear it down again anyway - to replace the guide tube.
02-01-2014 | 09:29 PM
#48
Three Wheelin'
Joined: Jun 2013
Posts: 1,391
Likes: 27
From: Norcal
I think I have a similar issue. I pulled my lower cover today to see the clutch the first time. First notice is grease everywhere. its this OK? Clutch rotating mass seems dry. I have a rattle when I engage the clutch and start the car moving. if I "pump" the pedal ( grab, ungrab, grab) it makes the sound.
I did find here that my ball cup on the fork arm is shot. is the play around the TOB ok?
I did find here that my ball cup on the fork arm is shot. is the play around the TOB ok?
02-01-2014 | 10:59 PM
#49
Team Owner
Joined: May 2004
Posts: 28,718
Likes: 2,702
From: Philly PA
the busing has failed,
replace it,
make sure to clean out the seating area on the arm use a sharp object to remove the crusty plastic.
Press the new bushing onto the ball then fit the arm socket
replace it,
make sure to clean out the seating area on the arm use a sharp object to remove the crusty plastic.
Press the new bushing onto the ball then fit the arm socket
