Page 6 of 6

Re: Clutch Release Bearing

PostPosted: Sat Nov 23, 2019 10:06 pm
by weddingcarclive
was thrust bearing noise only when you started to press the pedal and then disappeared with your foot off the pedal ? If so then the thrust bearing has completely left contact with the pressure plate pad so you did have a gap, all then points to being unlucky with a bad bearing quality, if the noise was constant then check the length of the carrier to be sure you don't have the carrier for finger pressure plate type which will constantly have been touching your pressure plate pad, I am sure the dealers SJS will tell you the differences in length of the two, it's worth the question to rule it out, to agree also with Craven & sticking cylinders, when I refitted our engine after replacing full clutch assembly, on pressing the pedal it was jammed solid and had been working correctly before removing the engine to fit a new ring gear, the clutch never having been a problem just replacing assembly as a matter of course sent my mind to what has gone wrong in there ??? The engine came out without the gearbox so hydraulics were not dismantled ! Answer nothing ! It was the master cylinder seized solid after 6 months of non use, still full of fluid and 12 months previously re rubbered, hence it was binned and master cylinder replaced

4 speed
https://www.sjsportscars.com/parts-and- ... Q6007Z.htm

5 speed
https://www.sjsportscars.com/parts-and- ... Q0046Z.htm

Re: Clutch Release Bearing

PostPosted: Sat Nov 23, 2019 10:32 pm
by rgh0
My bet is that the cause is just a failure of the poor quality bearing that all the "reputable suppliers" sell these days.

cheers
Rohan

Re: Clutch Release Bearing

PostPosted: Sun Nov 24, 2019 10:08 pm
by SADLOTUS
I'm hoping... and all signs are pointing towards, a duff bearing. Originally when fitted and adjusted there was no noise and a gap at the actuating rod - you could feel the gap by moving the arm. No noise for over a year. Driving off the ferry in September I felt a clunk and then noise when foot down... initially. Then soon after, intermittent noise when foot off the clutch pedal. A proper clackety clackety clackety graunching noise. You could stop the noise by dipping the clutch pedal momentarily. It was quieter in the morning or if the car had rested (2000 miles in a week) when perhaps the bearing cooled onto the carrier? Once driving you could feel through the pedal a throb and crunch.
Now I have the bearing out the theory of Nigel (co-driver) and I is that as the bearing broke up it would occasionally seize or jam then release as you dipped the clutch and the coverplate span up the bearing. I can replicate this on the bench with a tap/bash.
When we came off the ferry Nigel thought that was it...game over. But as I said, we did over 2000 miles down to Angouleme to see the racing... and back.
Anyway...just ordered new carrier and RHP bearing.
Will let you know how it goes.... this has been a nice long historic thread.

Re: Clutch Release Bearing

PostPosted: Sun Nov 24, 2019 10:49 pm
by weddingcarclive
I think all contributors to the thread will be interested in how everything pans out and hope for a happy ending !
Good luck