quote:Originally posted by Peter Fenlon:
will not give me half a millimetre between the clutch and flywheel
What are you talking about here Peter?
And the other half a millimeter between Throwout bearing and your "3 fingers" is not enough! You need to take the ZF off and modify your Throwout bearing so it allows more spacing. I dont remember if you told us wether its the type with the various spacer rings? The spacing can ONLY be measured by separating the bellhousing from the ZF and bolt it onto the Engine. I posted some sketches a while ago, perhaps you have them. You CAN NOT rely by feeling on the arm alone if there is space between throwout bearing and your 3 fingers BECAUSE even if you push your throwout bearing full aft the arm can be rocked a little back and forth since the forks that slides the throwout bearing forward has some play. That is the play that can fool you and that is the REASON the measurements MUST be done with the bellhouse OFF the ZF and ONTO the engine.
btw did I mention NO SHORTCUTS?
Secondly the displacement on the MASTER and SLAVE are in direct relation. Displacement = Radius of bore squared and multiplied by π and multiplied by the stroke. I.e. if they have same bore they have same stroke! PROVIDED there is:
a) no damage/internal leak and/or the fluid supply to the master is not starved (can happen i.e. if wrong parts are used when rebuild and piston does not retract/return fully to open for reservoir fluid access to bore)
b) no air trapped somewhere. It can be really tricky to get all the air out. I mention this again because it is very likely.
So if your strokes does not match based on a quick calculation of the displacement there is something wrong like a or b above. It is really not rocket scientism but no room for shortcuts.
I am not reading this out of a book Peter, this is from working with these things and latest when I changed engine last year with different flywheel etc. I went thru the whole procedure again with removing the bellhouse and measuring for sufficient play between throwout bearing and clutch (multi fingers) It is unfortunately an essential and absolutely required procedure. Guess you can put it together with standard OE parts and be LUCKY there is enough space. But there is no guarantee for that.
Please let me know if I am confusing you and if my explanation is not making any sense?
Jan