Cerbera clutch plate thickness

Cerbera clutch plate thickness

Author
Discussion

mrniceguy351

Original Poster:

131 posts

60 months

Thursday 29th February
quotequote all
I am getting closer to the point where I attach the gearbox to the motor on my 4.5 Cerb. I have measured the clutch plate thickness at 17mm. With a new clutch being near 900 pound I was wondering if anyone can tell me how much life is left in the clutch I have? It wasn't slipping when it was running.

mrniceguy351

Original Poster:

131 posts

60 months

Thursday 29th February
quotequote all

mrniceguy351

Original Poster:

131 posts

60 months

Thursday 29th February
quotequote all

mrniceguy351

Original Poster:

131 posts

60 months

Thursday 29th February
quotequote all

Luckyone

1,086 posts

239 months

Friday 1st March
quotequote all
I saved this screen grab from FB a while ago to answer that question, ignore the wear rates they are referring to the plate in question from that post.



That’s from 5 years ago so no idea if he still offers the service but the measurements should still be good.

You may want to double check your measurements though wink

ukkid35

6,285 posts

180 months

Friday 1st March
quotequote all
ClutchFix are great, I got a pair of discs relined a few months ago for £166, sadly a big rise from £113 in 2020

It's really handy to have a spare pair of friction discs ready swap, just in case

I would get the other surfaces skimmed if you can't remove the surface rust completely

If the clutch has slipped significantly in the past, you must get the diaphragm spring replaced, otherwise you'll regret it - ask me how I know

ukkid35

6,285 posts

180 months

Friday 1st March
quotequote all
Back from ClutchFix, who would also be happy to refurb the rest of the clutch





Be sure to clean up the pins, and replace the star washers


mrniceguy351

Original Poster:

131 posts

60 months

Saturday 2nd March
quotequote all
Luckyone said:
I saved this screen grab from FB a while ago to answer that question, ignore the wear rates they are referring to the plate in question from that post.



That’s from 5 years ago so no idea if he still offers the service but the measurements should still be good.

You may want to double check your measurements though wink
I guess those numbers refer to the thickness of the friction material not the overall plate thickness. I will have to check that measurement when I am home next, and see if anywhere local can "re coat" the discs.

ukkid35

6,285 posts

180 months

Sunday 3rd March
quotequote all
I'm not sure I'd ever let the discs wear as much as 1.1mm per side

That's nearly 4.5mm total, I wouldn't expect the diaphragm spring to be able to handle that

Luckyone

1,086 posts

239 months

Sunday 17th March
quotequote all
ukkid35 said:
ClutchFix are great, I got a pair of discs relined a few months ago for £166, sadly a big rise from £113 in 2020
I’m just pulling the gearbox back out (oil leak) so as you recommended them was thinking of getting the clutch done while it was out, what kind of turn round time was it for you?

ukkid35

6,285 posts

180 months

Monday 18th March
quotequote all
No more than two weeks, probably half that

Sorry I can't be more specific

Luckyone

1,086 posts

239 months

Monday 18th March
quotequote all
ukkid35 said:
No more than two weeks, probably half that

Sorry I can't be more specific
Great thanks, as long as it’s not a month or two!

It’s down to 6.45mm overall on the one that’s just drops out, one half is more worn than the other though so I’m sure it’s worth get done for that price & turn round time.

Luckyone

1,086 posts

239 months

Thursday 11th April
quotequote all
ukkid35 said:
No more than two weeks, probably half that

Sorry I can't be more specific
You were spot on, just under two weeks to get them back.

Before:


However one side seems to wear more than the other:




Both plates were the same with the bearing side (as labelled there) wearing more, it was noticeable how much closer the rivet heads were to the surface on the more worn side. So just checking over all thickness isn't the best thing to do. Obviously if the rivet heads do touch the metal surfaces then you're much more likely need a whole new unit....

After:


Contradicting myself by not showing both sides separately there but they were the same!

mrniceguy351

Original Poster:

131 posts

60 months

Thursday 11th April
quotequote all
Thanks for that Luckyone!

ukkid35

6,285 posts

180 months

Thursday 11th April
quotequote all
Is that a new diaphragm spring?

Luckyone

1,086 posts

239 months

Saturday 13th April
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mrniceguy351 said:
Thanks for that Luckyone!
No problem, I’d have done it sooner but my photos hosting app stopped working on the phone, fortunately I found it still works on the PC smile

ukkid35 said:
Is that a new diaphragm spring?
I didn’t buy it, it’s out of the crashed green Cerb I bought last summer but it says Powers Performance on it so it can’t be original, the car had only done 39k so those wear rates are most likely on that cars second clutch. Although I guess it’s possible it had a new spring only a while back…

FarmyardPants

4,173 posts

225 months

Saturday 13th April
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ukkid35 said:
Is that a new diaphragm spring?
Looks brand spanking to me