Clutch slip - suspected oil on friction plate - solutions?
Clutch slip - suspected oil on friction plate - solutions?
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Discussion

DanielJames

Original Poster:

7,543 posts

192 months

Monday 28th May 2012
quotequote all
Or do I have to replace the clutch...

Long story short, the bell hosing cracked on the clutch side and since replacing the box, we have a bit of clutch slip when applying full throttle.

If I can avoid getting that box off again it will be grand, I've heard of spraying brake cleaner on the surface (you can gain access through the crank sensor hole) to remove the grease from the surface but haven't tried it yet.

Anybody had this problem before?

Dan

aw51 121565

4,773 posts

257 months

Monday 28th May 2012
quotequote all
Try adjusting the clutch cable first wink ; if it's a hydraulic clutch then see if there is anything in the Haynes Book o'Lies about setting it up. Did you change the clutch plate while it was apart? Is there any oil coming out of the bottom of the bell housing now?

Brake cleaner will do the job if necessary, yes, but you'll need a lot. My reply relies on a guess that the clutch only bites at the top of its travel now, but it 'bit' further down its travel before you changed the 'box?

DanielJames

Original Poster:

7,543 posts

192 months

Monday 28th May 2012
quotequote all
aw51 121565 said:
Try adjusting the clutch cable first wink ; if it's a hydraulic clutch then see if there is anything in the Haynes Book o'Lies about setting it up. Did you change the clutch plate while it was apart? Is there any oil coming out of the bottom of the bell housing now?

Brake cleaner will do the job if necessary, yes, but you'll need a lot. My reply relies on a guess that the clutch only bites at the top of its travel now, but it 'bit' further down its travel before you changed the 'box?
Hi, the clutch is a self adjusting cable, it cannot be adjusted unfortunately. The gearbox I got the car from had an adjustable cable though, strange eh?

Clutch pedal is still mid travel, bites very sharp but strong.

Previous owner told me it has a paddle clutch, but my mate who helped me do the box says the clutch looked stock

DanielJames

Original Poster:

7,543 posts

192 months

Monday 28th May 2012
quotequote all
and no the bell housing is oil tight now, didn't change the friction plate

Krikkit

27,842 posts

205 months

Monday 28th May 2012
quotequote all
You had the box off but didn't change/clean the clutch?

Try the brake cleaner, that or a decent degreaser, and hope. smile

Superhoop

4,877 posts

217 months

Monday 28th May 2012
quotequote all
Coca Cola sprayed over the clutch plate is suppossed to help - Don't ask me why, how, or how it's done, but it is supposed to work

ETA: Looking at Google, it seems it's not just me that's heard of this method either

DanielJames

Original Poster:

7,543 posts

192 months

Monday 28th May 2012
quotequote all
Krikkit said:
You had the box off but didn't change/clean the clutch?

Try the brake cleaner, that or a decent degreaser, and hope. smile
Yep, didn't cross my mind to clean it, feel a bit silly..

Wouldn't have changed it as it was changed recently

DanielJames

Original Poster:

7,543 posts

192 months

Tuesday 29th May 2012
quotequote all
Last night I emptied a can of brake cleaner on the friction plate, through the crank sensor hole as the small gap behind a dust shield. The car seemed a lot better at first but once warm the clutch slipped again.

Hard to understand since it bites great, doesn't judder or slip at all engaging gears. Just when you boot it.

Phoning the local french car specialist now

V8 FOU

3,023 posts

171 months

Tuesday 29th May 2012
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Once a friction plate is contaminated with oil, you can't remove it. The heat of use and slipping will only make it worse as the oil is embedded into the material. The only answer is to replace the whole clutch and poss reface the flywheel as being cast iron the oil can get into the metal too. EEk!

Mr2Mike

20,143 posts

279 months

Tuesday 29th May 2012
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Does the pedal offer full resistance as soon as you depress it, or is there a little bit of free play so the first inch or so is much lighter?

Krikkit

27,842 posts

205 months

Tuesday 29th May 2012
quotequote all
What car is it? VTS/VTR box off isn't a big job, couple of hours at worst. Valeo clutches are <£90, job jobbed!

DanielJames

Original Poster:

7,543 posts

192 months

Tuesday 29th May 2012
quotequote all
Mr2Mike said:
Does the pedal offer full resistance as soon as you depress it, or is there a little bit of free play so the first inch or so is much lighter?
About an inch yeah before it bites, clutch is heavy but as expected

DanielJames

Original Poster:

7,543 posts

192 months

Tuesday 29th May 2012
quotequote all
Krikkit said:
What car is it? VTS/VTR box off isn't a big job, couple of hours at worst. Valeo clutches are <£90, job jobbed!
It's one of them, I know it isn't a big job. But I replaced the box last weekend, so a bit miffed itll have to come off again

TallbutBuxomly

12,254 posts

240 months

Tuesday 29th May 2012
quotequote all
Trust me daniel there is no quick fix on this one. I just did mine for a similar reason though there was a leak allowing oil to get in on a regular basis. Clutch surface was badly damaged. Get it over with and learn from it.