Having now completed a checking and measuring exercise, I find that I have a 4mm thrust on the inner face and a 3.5mm thrust on the outer. With a new flywheel housing gasket fitted to the housing, there is a 0.05mm clearance between the thrust washer and the gasket face (effectively the gearbox thrust face). Gasket is 0.67mm. Allowing for gasket crush of 0.02mm says to me that i could really do with swapping the 4mm thrust for a 3.5mm ending up with two the same. Am I thinking right here?
I think you've got your measurements wrong? 0.5mm is 20 thou.
Ah! I think you might be right Alex! I've got .05mm clearance. I would gain .5mm with the thinner thrust washer, but would lose .02mm with the gasket crush. So, 0.05 + 0.5 - 0.02 = 0.53. I'm looking for 1.0mm - 1.8mm according to the Haynes manual, so that says I need to go to 3mm thrust and a 3.5mm to gain 1.0mm and end at 1.03mm. Does that sound better?
Sounds worse 
. What are you measuring the shims with? Needs to be with a micrometer as the shims go up in about 0.025mm ( 1 thou). You need 0.1mm (4 thou) of float so you need 0.07mm (2.7 thou) less on the shims. The standard shims start at 3.3mm (130 thou) and go up to 3.53mm (139 thou)
Edited by alex-95, 02 January 2019 - 08:13 PM.
Decimal point in the wrong place for the desired end float! Should have read 0.1mm to 0.18. To clarify, I've got 0.05mm end float with a new gasket. Assuming a crush of .02mm means that the endfloat is reduced to .03mm. On that basis I need to gain at least 0.07mm more endfloat (as you said Alex, but I think you meant less on the shims not more?). If I change the 3.4 shim for a 3.35, that should give me what I need.
