labrat Posted April 24, 2001 Share Posted April 24, 2001 Okay, here's the deal. I have a 1966 327 and i want to "freshen" it up a bit with rings and bearings. My question is, how can i tell if the previous rebuild used oversized rings and/or bearings? Is it stamped on the part anywhere? Or do i have to dig out my micrometer? Any input would be appreciated! Keep up the good work, and this forum rocks!!! Bill Quote Link to comment Share on other sites More sharing options...
DavyZ Posted April 24, 2001 Share Posted April 24, 2001 Dust off that old micrometer and put it to good use! Sorry, Chap, but you nailed it the first time. David Quote Link to comment Share on other sites More sharing options...
Guest Posted April 24, 2001 Share Posted April 24, 2001 hello....clean the tops of the pistons off with some fine sand paper...it will be stamped on the tops if they are oversized.... Quote Link to comment Share on other sites More sharing options...
labrat Posted April 25, 2001 Author Share Posted April 25, 2001 Yeah, i was afraid of that. Oh well. Thanks for the input! Bill Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted April 25, 2001 Share Posted April 25, 2001 The piston tops, if they've been replaced before/upsized w/new pistons will have the ".015, .030 or .060 embedded in them-if they dont/measure the bore anyway just so you know what you've got. Likewise, the main & rod bearings will have "Std" for "Standard Size" embedded or it will have the ".010, .020" undersize embedded in the back of it as well. Regardless of what the bearings say or the piston top says...always mic it yourself/that way you know exactly what you've got & if your bore isnt badly worn you can get by w/simply honing the cyl's for that cross hatch pattern & re-ring your eng & install new rod/main bearings. While those heads are off-shoot scoot & boogie over to your nearest/favorite machine shop for a valve job. Kevin, Yea,Still an Inliner) [ April 25, 2001: Message edited by: Kevin Shasteen ] Quote Link to comment Share on other sites More sharing options...
labrat Posted April 30, 2001 Author Share Posted April 30, 2001 Pulled the manifolds and heads today, pistons have STD stamped in the top, and there is no ring groove at the top of the cylinders, so i am hoping this is a good thing. Have to figure out a way to get the motor off of jackstands and onto my new engine stand before i can open up the bottom end. Bill by the way, should there be evidence of crosshatching on the cylinder walls? Mine are very very smooth... [ April 30, 2001: Message edited by: labrat ] Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 30, 2001 Share Posted April 30, 2001 You might see crosshatching on a very recently rebuilt engine. After a few miles and the rings get orientated to the cylinder walls, they'll eventually start knocking the high spots of the cross hatching away. An inside mic. will tell you how the walls are. Without a ridge on top, it could have reasonably small amount of wear, but thats usually carbon, and not necessarily the telling sign, although could mean low miles ,IMHO only the mic. knows for sure! Regards, Lone Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted April 30, 2001 Share Posted April 30, 2001 Only 'the Mic' knows(?); Isnt 'the Mic' a comic book hero? Kevin, (Yea,Still an Inliner) Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 30, 2001 Share Posted April 30, 2001 Hmm, not sure on the comic book haha. When I was writing it I was thinking about it being from a far earlier time than I can remember (can't say that very often these days haha). Radio. "Only the shadow knows... mwahhaahhaa.. " Lone Quote Link to comment Share on other sites More sharing options...
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