Re: Piston clearance spec for rebuild

Posted by HH56 On 2012/5/31 19:58:07

only mildly related, but are the Egge pistons frowned upon?

The origin of my issue with the Egge pistons is not entirely clear. Whether it was due to the machine work and using too little clearance on the cast piston or a defective piston is unknown. I suspect the clearance was too small as I believe factory spec was used in lieu of any specific documentation with the pistons stating differently. There was no other piston option for a stock rebuild at the time.

The car had less than 500 miles after a rebuild when the engine started "screeching". Upon disassembly, the machinist said one piston had "collapsed" and other cylinders were badly scuffed. Not sure what specifically he meant by "collapsed".

Since the only option was another set of the same piston, and the engine had to be completely bored to clean up the first mess, a well known Packard person suggested boring further oversize and installing Chrysler pistons. Those are in the car now. As Dave mentioned he has had no issues with Egge and I know others have had good luck as well. All I can relate is my experience.