Clutch Clearance

Recently I replaced a clutch and throw-out bearing in a Model “A”, which I have done several times before.  But this time when the clutch pedal was engaged, there was a loud ticking noise.

After dismantling the whole system again, I found the problem.  An obvious mark was seen on one of the four bolts that hold the flywheel to the crankshaft.  The replacement clutch has springs where the original did not.  These springs help absorb shock when engaged, but does create a clearance problem.  The springs were catching on the bolt.  After measuring with calipers, I found one bolt head .050 thicker than the other three.

The correct bolt head thickness is .310.  The clearance is close, but don’t leave out the spacer ring.  It holds the dowel pins in.  To help your clearance, the best thing to do is to use a punch and hammer on the flanges next to the springs on the flywheel side only.  Normally there is about .070 clearance between the springs and bolts.  But if the flywheel has been refaced or cut down to fit the V8 pressure plate your clearance can change.

This tech tip was provided by AJ Pennington and was printed in the May 2003 “A” Quail Call.

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