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S12 Technical Areas => Drivetrain Tech => Topic started by: cls12vg30 on 06:48:54 PM / 07-Nov-20

Title: Clutch Slave cylinder fitment
Post by: cls12vg30 on 06:48:54 PM / 07-Nov-20
Last weekend I replaced the clutch slave cylinder on my 88 SE with a new one from AMS.

I had a bit of trouble as it seemed difficult to fit the new cylinder into place.  I had to pry back the clutch fork a few millimeters to get both bolt holes to line up, even though it appeared to be the exact same length as the old one, the pushrod looked to be the same length, etc.   When I got it together it seemed like it wasn't allowing the clutch fork to fully retract, even with the piston bottoming out in the slave cylinder.

Sure enough, I had it out today and the clutch is slipping under heavy load in high gears.  So it seems like the clutch plate is not fully engaging with its full spring pressure.

This is the part I used. (https://www.rockauto.com/en/moreinfo.php?pk=1135403&cc=1208674&jsn=2461)

What do you guys think?  Try another cylinder?  Shave the pushrod?
Title: Re: Clutch Slave cylinder fitment
Post by: JonB on 07:23:59 AM / 08-Nov-20
Isnt there an adjustment at the rod on pedal?

Its been a while, but i think thats what i recall.

Mess with it there first, so theres like an inch or two of free travel before you can feel the pressure on the pedal?
Title: Re: Clutch Slave cylinder fitment
Post by: cls12vg30 on 02:56:22 PM / 08-Nov-20
Isnt there an adjustment at the rod on pedal?


There is, but that's not where the issue is.  Free play on the pedal is just right.  The issue is that, even with the slave cylinder fully retracted, the clutch isn't in its fully engaged position.  It's not a big difference, but it could be enough.
Title: Re: Clutch Slave cylinder fitment
Post by: rednucleus on 03:45:20 PM / 08-Nov-20
try swapping in the original pushrod
Title: Re: Clutch Slave cylinder fitment
Post by: JonB on 08:26:16 PM / 08-Nov-20
Yea, try what rednucleus says.

Looks like its gonna take some effort.

Check the old vs new. Make sure the piston is setting fully back, etc. Grind as last resort i suppose.

Usually you have to shove that thing on there, i know that.

But i cant say i ever had one that was too long.

I have had rockauto send me the wrong stuff though.