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Clutch disengagement issues


rollex

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  • Member For: 10y 5m 1d
  • Gender: Male
  • Location: Australia
9 minutes ago, Ralph Wiggum said:

Air is getting into the system during operation. 4 days appears to be long enough for it to bleed out. 

 

Check the obvious connections and alignment of the MC. If it's on the piss it may draw air in during movement.

 

If nothing obvious presents itself topside it's likely a CSC issue. Doubly so if there is black gunk building up in the fluid.

 

Also if you feeling the car move when the syncro's are trying to brake the input shaft motion you're wearing them very quickly.

 

Also, if the clutch point has changed without any mechanical reason (ie after you had the correct PP installed and the crush depth set) but after the MC was changed it's possible the adjustment is incorrect and you're not getting full travel out of the MC.

Ok I'll check all the fittings on the MC and see if I can see any air bubbles in the resovoir. The MC is a remake of the factory one with metal instead of plastic so hopefully it doesn't need readjusting.

 

How much would it change between MCs?

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  • Member For: 10y 5m 1d
  • Gender: Male
  • Location: Australia

Fitting the MC? There wasn't anything to adjust?

 

Also if I do need to drop the box, can you recommend any clutch experts in Adelaide? I used to do boxes in my driveway but buggered if can be bothered trying to do that anymore.

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  • 2 weeks later...
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  • Member For: 10y 5m 1d
  • Gender: Male
  • Location: Australia

Took the car to a clutch guy locally to me and he said there is something going on with the clutch itself and doesn't think it is the master or air in the system. Said the pressure profile feels wrong, eg when you put the clutch the floor it should feel lighter as you get closer to the floor but mine feel linear/heavy the whole way despite the takeup point feeling normal.

 

Going to drop the box and he will set it all up on the bench to figure it out. Clutch is still in warranty so hopefully not an installation issue and something has just failed.

Edited by rollex
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  • Member For: 10y 5m 1d
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Ok so the box is out and he bench tested it and said the clutch is completely disengaging and functions fine. He said the spigot bush is pretty average and he suspects it is transferring power to the box whilst the clutch is disengaged causing the crunching.

 

Other than that he said it is quite strange as it is a needle bush and even when dry shouldn't be too bad however there isn't much else that could be causing the problem.

 

Fingers crossed all good once he changes that.

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  • Dropping a turd
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  • Member For: 17y 13d
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  • Location: Perth

Doubt that's the issue, but could be a contributing factor. The rest of my post was incorrect, so I deleted it.

Edited by arronm
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  • Member For: 10y 5m 1d
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The clutch is fully disengaging, he bench tested it and physically confirmed the plate was disengaged. Also when driving the takeup point was always 1 inch off the ground. The clutch worked fine for over a year before this problem occurred which suggests something has broken. Also if that was wrong it wouldn't be inconsistent with it working fine some days, currently it is random. Some days (hot or cold) it disengages fine however it has steadily gotten worse over the past few months.

 

He remeasured everything up for good measure (lol) and said there is nothing wrong with the clutch or the setup.

Edited by rollex
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  • Member For: 8y 5m 21d
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On 05/12/2016 at 0:43 PM, Ralph Wiggum said:

Air is getting into the system during operation. 4 days appears to be long enough for it to bleed out. 

 

Check the obvious connections and alignment of the MC. If it's on the piss it may draw air in during movement.

 

If nothing obvious presents itself topside it's likely a CSC issue. Doubly so if there is black gunk building up in the fluid.

 

Also if you feeling the car move when the syncro's are trying to brake the input shaft motion you're wearing them very quickly.

 

Also, if the clutch point has changed without any mechanical reason (ie after you had the correct PP installed and the crush depth set) but after the MC was changed it's possible the adjustment is incorrect and you're not getting full travel out of the MC.

 

This ^^^^ 

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