Thread: Ring Compressor
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911pcars 911pcars is offline
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Join Date: Jul 2000
Location: So. Calif.
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Obviously, there's a few ways of installing the piston/cylinder assy.

On Pcars, the pin-to-piston-to-con rod fit is "free floating". That is, during normal operation, there is relative movement between all the parts (note the bearing bushing in the small con rod end). As applied to other vehicles, an interference fit is when the con rod small end (no bushing) is sligthly smaller than the piston pin OD, and the pin is forcefully pressed (hydraulic-type) through the con rod; thus the only relative movement is between the piston pin and the piston pin bore. The free-floating arrangement provides more bearing area but requires greater attention to clearances.

Whatever method you use to assemble the P/C, you might find it easier to install one piston circlip on each piston before installing the pin. If only the rods are installed first, then the pistons, then one side of the piston may not be accessible after installing the first couple of piston/rod assemblies.

Old 03-17-2005, 10:24 AM
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