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Old 02-04-2010, 08:36 AM   #1
railhor5.9

Name: railhor5.9
Title: cummins racer
Status: Not Here
Join Date: Mar 2009
Location: rio vista tx
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Posts: 95
piston ring end gap?

my buddies are building there motors one a 12 valve and the other a common rail, on the 12v we cant move the piston side to side in the block its real tight. on the common rail we can move the pistons a lil. i pulled the #3 piston out and took the rings off and put them in the cylinder 1 inch down, they all have around 20 thousands end gap. just wondering what the specs were on the cr. and if i am suppost to be able to move the piston around. the cr has std pistons and the machine shop said the bores were still std, but they dont feel right. just seems like there would be some piston slap the way they are.
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1993 single cab short bed! D250, 175 P-PUMP,5X14's, BHAF, 4KGSK,SBC,FASS. mack plug. 26* timing, mahle 155*
1997 2500 4x4, 913 pump, DD
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