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Mix and match used clutch parts..will it bed in?

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cobblers Posted a lot Posts: 3,921	Mix and match used clutch parts..will it bed in?cobblers @cobblers
	Jan 18, 2010 20:31:58 GMT Select Post Deselect Post Link to Post Back to Top
	I've just swapped engines on my 106 (That makes 10 engines over my last 4 cars :S) and when it came to putting the clutch back together, I ended up using a ~3000 mile pressure plate, and a friction plate that had plenty of meat on it, looked almost new. It was all in good condition visually. I put it all together, it started fine and ran nice, then I came to set off home. Put the boot down and the revs flew up. I thought "wow, so much power it's wheelspinning, perhaps the road might be a bit greasy" Then the same in second gear... then I realised... The clutch was slipping like mad - Driveable but only just. Has anyone done the same? It seemed to get a tiny bit better over the drive home. I guess that the clutch friction plate has worn to suit it's old cover, and doesn't match the new one. I gave it some hammer (to try and wear it in) over the space of the 5 mile drive, avoiding getting it too hot, but even 1/4 throttle makes it spin up like mad. I'm pretty much going to just take it apart and stick a new clutch in tomorrow unless someone can say "oh yeah, I did that, it slipped like an alsation on laminate flooring for 2 days, then it was fine" I knew I shouldnt have listened to "aah, use this friction plate its better quality, and use that cover, it's got bigger springs"


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phil withers Part of things Posts: 226	Mix and match used clutch parts..will it bed in?phil withers @philwithers
	Jan 18, 2010 21:07:28 GMT Select Post Deselect Post Link to Post Back to Top
	Erm, no, pretty sure it won't bed in, sorry ! Sounds like something else is up though TBH, have mixed and matched clutch parts in the past with no worries ? Just a shame they have to bury the god damn things between the engine and box
	'A' series trigger wheels and sensor brackets, 205 GTi radiator brackets, general fabrication and machining - www.gsmotorsport.net

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cobblers Posted a lot Posts: 3,921	Mix and match used clutch parts..will it bed in?cobblers @cobblers
	Jan 18, 2010 21:16:00 GMT Select Post Deselect Post Link to Post Back to Top
	Yeah, I'd have thought it would be fine too (That's why I did it!) It's a cable clutch which feels fine, it's adjusted a bit on the loose side if anything, and there is no trace of oil on anything. The release bearing slid up and down the input shaft nice and easy, and the release arm isn't catching.. Unless I put the clutch plate in the wrong way round, and the input spline boss is sitting against the crank nose, keeping it off the flywheel. I did have to loosen the cable off a bit, come to think of it. There were no markings so I eyed it up, but nothing seemed to foul. Ah well, I'll pull it to bits again, lol!


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Deleted Posts: 0	Mix and match used clutch parts..will it bed in?Deleted @Deleted
	Jan 18, 2010 23:05:07 GMT Select Post Deselect Post Link to Post Back to Top
	it does sound like there is another problem there as you are more likely to get clutch judder than slip with mix and match parts and they would usually bed in pretty quick


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cobblers Posted a lot Posts: 3,921	Mix and match used clutch parts..will it bed in?cobblers @cobblers
	Jan 18, 2010 23:41:01 GMT Select Post Deselect Post Link to Post Back to Top
	I took it for a quick spin and when the clutch slips there is a slight squeaky metallic noise, like the middle of the clutch plate rubbing on the crank sort of noise. I recall when I put the clutch plate in, and Paul said "It'll probably say on the plate which way it goes" and I went "well it's obviously this way", then banged it on. I reckon it's my subconcious that enjoys working on cars, so forces me to make mistakes. Atleast I've got a warm, spacious workshop to work on it (on the condition that I give the owner a hand tidying it up and working on his 106)


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kee Posted a lot Posts: 4,990	Mix and match used clutch parts..will it bed in?kee @kee
	Jan 19, 2010 6:57:34 GMT Select Post Deselect Post Link to Post Back to Top
	my subconscious does that, but i have to work outside by the road


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Adam Posted hell of a lot Posts: 7,010	Mix and match used clutch parts..will it bed in?Adam @locoster
	Jan 19, 2010 13:54:33 GMT Select Post Deselect Post Link to Post Back to Top
	There are two different types of TU clutch, one is thicker with a thinner bearing and one is thinner with a thicker bearing IIRC. There were two different types of release bearing available to me when i had to replace it. Could it be that you've used a thick bearing with a thick clutch and therefore it's not engaging properly?
	1997 TVR Chimaera 2009 Westfield Megabusa

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cobblers Posted a lot Posts: 3,921	Mix and match used clutch parts..will it bed in?cobblers @cobblers
	Jan 19, 2010 15:39:12 GMT Select Post Deselect Post Link to Post Back to Top
	The clutch arch was "loose" at the end of its travel, so I'm fairly sure the release bearing was disengaging properly, and not constantly pressing on the bearing. The clutch cover was reused, so it must have been compatible with the bearing (it worked before) but the plate itself was swapped. It was the same thickness as the original, but the springs were a lot tighter, that's the only difference I could see. We got the box off, and everything looked fine inside - I hadn't got anything the wrong way round... Swapped the clutch and cover, put it back together and its sorted now, and only took a couple of hours. And now it really does wheelspin all the time - can't wait for a dry road again, first and second are useless!


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