Bolt size for pressure plate to flywheel.

M8x25 Gr8.8

If you need more detail:
M8 x 25mm long rolled thread precision bolt to Australian Standard AS1110 grade 8.8 (rated at 80% yeild stress of the bolt, 800MPa)....Recommended torque for black bolt without lubricant and preload 65% proof load of the bolt (general engineering practice) is about 20-22Nm, for more accuracy then a strain gauge should be used. Yes most of this is unknown, but very important. Should you require further explanation then please contact me via email...As a guide I have 530Nm at the flywheel from a 2L engine with 6x M8 bolts holding the clutch to the flywheel and they are fine for this load....

quote:

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Originally posted by William

mark

think he meant that he didn't put up enough info.

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Yes I know and assumed ford 4 cylinder flywheel to clutch but it was also fun to write a trilogy[:u][:x)]

bolts may only be 16-20mm long, depends on the flywheel thread depth...

quote:

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Originally posted by Mark

If you need more detail:
M8 x 25mm long rolled thread precision bolt to Australian Standard AS1110 grade 8.8 (rated at 80% yeild stress of the bolt, 800MPa)....Recommended torque for black bolt without lubricant and preload 65% proof load of the bolt (general engineering practice) is about 20-22Nm, for more accuracy then a strain gauge should be used. Yes most of this is unknown, but very important. Should you require further explanation then please contact me via email...As a guide I have 530Nm at the flywheel from a 2L engine with 6x M8 bolts holding the clutch to the flywheel and they are fine for this load....

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Love the detail

Shaun