Nigelw Posted October 19, 2015 Share Posted October 19, 2015 Been 200kms on the new clutch but tonight I managed to slap it into 3rd not 1st and when booting it off the roundabout it slipped like a slippery thing on a slippery surface, an instant "Doh" moment and a drop into second got us on our way. But what went wrong? Any special procedures for bedding the clutch in? Never had this before so looking for ideas here..... Quote Link to comment Share on other sites More sharing options...
Ash.Witty Posted October 19, 2015 Share Posted October 19, 2015 What material is on the friction plate? Std sprung clutch cover? Mild or heavy tuned engine? Quote Link to comment Share on other sites More sharing options...
Nigelw Posted October 20, 2015 Author Share Posted October 20, 2015 Pretty much std clutch pack really, 200Tdi running 15psi at manifold and a mild tweek on the pump, not exactly a competitor to your Cummins Ash but it can't half shift when you push the 200Tdi hard! Quote Link to comment Share on other sites More sharing options...
V8 Freak Posted October 20, 2015 Share Posted October 20, 2015 I've never had to bed a clutch in before, but my last clutch change I did experience slip initially... Drove for about 5 miles in a spirited fashion backing off when slip occurred. Drove sensibly for a while to let it all cool off and it's not slipped since. I think there would be a risk of slipping too much, generating too much heat and potentially baking / glazing the surface... I've got a re-mapped TD5 with VNT and bigger intercooler all from IRB so it has the power and torque to test a standard clutch... But all ok so far !! Quote Link to comment Share on other sites More sharing options...
western Posted October 20, 2015 Share Posted October 20, 2015 just fitted a new clutch in my 110, just drive it normally, never bothered to 'bed in' a clutch before Quote Link to comment Share on other sites More sharing options...
miketomcat Posted October 20, 2015 Share Posted October 20, 2015 I might be wrong but I think there is some adjustment on the pedal to push rod but I might be thinking defender. Mike Quote Link to comment Share on other sites More sharing options...
vulcan bomber Posted October 20, 2015 Share Posted October 20, 2015 I might be wrong but I think there is some adjustment on the pedal to push rod but I might be thinking defender. Mike Yep defender pedal is adjustable, Disco isn't. Quote Link to comment Share on other sites More sharing options...
missingsid Posted October 20, 2015 Share Posted October 20, 2015 What was the flywheel surface like when you changed the clutch? Glazed from overheating, ridged from over worn friction plate? I damaged the flywheel of a 400bhp car by leaving the cltch wear too long but with proper surface preparation/cleaning by the garage the replacement clutch never slipped even when burning out the rear tyres. It is often said here that oil burners have very high torque pulse stresses on drivetrains so is it possible that the issue was just a high gear resisting acceleration and high torque opposing it was just too much for the only place it could slip and it may be fine in normal use? If so then the alternative could have been more expensive? Quote Link to comment Share on other sites More sharing options...
Nigelw Posted October 21, 2015 Author Share Posted October 21, 2015 Flywheel was fine and I did in fact run the engine on the hoist momentarily whilst holding a bit of emmery in my paw to see what it was like but no signs of glazing. Hadn't thought about the latter! For sure a bit of clutch slip is prefferable to gearbox/diffs/half shaft destruction!!! Quote Link to comment Share on other sites More sharing options...
reb78 Posted October 21, 2015 Share Posted October 21, 2015 If it wasn't already bedded in, you probably achieved that when it slipped. I imagine its similar to brakes and its about transference of a layer of the friction material onto the surface of the flywheel that the friction plate meets. Read a load about the theory with brakes when i had problems with my last 5 series and brake judder (actually turned out to be bushes!) - more info here: http://www.centricparts.com/files/Centric%20White%20Paper%20C2-Bed-In%20Theory.pdf and here http://www.zeckhausen.com/bedding_in_brakes.htm on that. Quote Link to comment Share on other sites More sharing options...
missingsid Posted October 22, 2015 Share Posted October 22, 2015 I have had a few differing types of car that suffered from clutch slip, with a period of sympathetic driving they all lived to last another year or so of normal driving. Quote Link to comment Share on other sites More sharing options...
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