Originally Posted by
Fla_Xfire_SRT
"The gap between the clutch plate and a the pulley is determined by the stops that the spring pulls the clutch plate back to"...That's not the only determining factor as we found recently. The shim behind the SC pulley bearing and the amount of shims on the SC shaft have a lot to do with obtaining proper clearance gap
Is this an answer to my previous post?
The gap between the clutch plate and the pulley flange is set by the stops on the pulley flange - period. That is if the springs are doing their job correctly.
The gap between the magnet and the clutch plate is determined by the distance between the back of the bearing and the front face of the magnet face minus the distance between the back of the bearing and the rear face of the clutch plate. Shims between the back face of the bearing and the shaft shoulder will adjust the gap.
Any shims between the pulley shoulder inside and the back face of the outer bearing would be the result of poor design calculations or manufacturing errors as the snap ring should hold it close enough. Designed or made correctly no shims would not be required there.
When the springs do not pull the clutch plate back to the stops, the springs have failed and all bets are off.
Adhering to the basic sizes and materials of the OEM pulley and using real springs, the design of the pulleys should have been a doddle.