Posted by Charlie Bilerx on January 31, 2010 at 15:26:46 from (64.201.85.120):
In Reply to: 4.750 piston posted by steve il on January 31, 2010 at 13:48:00:
steve il,
If you are looking for the M&W/Gould pistons; you may want to broaden your search criteria a bit. Minneapolis-Moline marketed this same series of pistons as #10P2962. Occasionally you may come across this same piston marked as Zollner. Zollner really made all these pistons. They just never marketed them until everyone else stopped selling them. You can mix Zollner, M&W, and Gould pistons in one engine. Just never mix Moline pistons with the other brands. You will not be happy with the results.
Be warned; all of this classic series of aluminum piston, whatever brand, is prone to stress cracks. Make sure you soda blast used pistons and check them for stress cracks from around the outer edge of the top to the first ring groove. This was not a flaw in design. The cracks are caused by the aluminum of the era and detonation. Rubbing and wire brushing will actually hide the cracks.
New 4.751" bore pistons are in the pipeline. Production samples are being made and then they have to be "tested" for a few grueling weeks. Before the flowers bloom; we will be shipping the new pistons.
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