dwet6 Posted July 26, 2009 Report Share Posted July 26, 2009 I plan on putting a new piston and ring kit in the shee but i dont kno if the engine was ever bored out or not therefore i do not kno what size the pistons are. Is there anyway of telling whether or not the engine was bored and or what size my pistons are, please help. Thanks P.S. I have then engine tore down to the pistons already, bout to take them out as i speak Quote Link to comment Share on other sites More sharing options...
toolman Posted July 26, 2009 Report Share Posted July 26, 2009 Should be numbers on the top of the pistons that tell what size they are. You may have to clean them if they have carbon on top. Quote Link to comment Share on other sites More sharing options...
spurdy Posted July 26, 2009 Report Share Posted July 26, 2009 I plan on putting a new piston and ring kit in the shee but i dont kno if the engine was ever bored out or not therefore i do not kno what size the pistons are. Is there anyway of telling whether or not the engine was bored and or what size my pistons are, please help. Thanks P.S. I have then engine tore down to the pistons already, bout to take them out as i speak If you can't read the numbers on the pistons then you can always measure the bore. Which will need to be done anyway to make sure it isn't out of round or tapered before purchasing new pistons. Clymer's states the tolerances for the bore as far as shape and taper. Good luck, SP Quote Link to comment Share on other sites More sharing options...
dwet6 Posted July 26, 2009 Author Report Share Posted July 26, 2009 Should be numbers on the top of the pistons that tell what size they are. You may have to clean them if they have carbon on top. yea there are numbers on there but which one tells you what size Quote Link to comment Share on other sites More sharing options...
SAVAGE420 Posted July 26, 2009 Report Share Posted July 26, 2009 (edited) yea there are numbers on there but which one tells you what size The first couple. It should say on top at the very end, ether: 6400, 6450, 6500 6550 ect ect ect. then all should start with 513. So what do they say??? BTW this is for Wiesco stock stroke pistons :thumbsup: Edited July 26, 2009 by savage420 Quote Link to comment Share on other sites More sharing options...
Wildcardracing Posted July 26, 2009 Report Share Posted July 26, 2009 The part nuber is usually stamped right accross the middle of the crown. Give us all of the numbers and we can tell you what size they are. Quote Link to comment Share on other sites More sharing options...
dwet6 Posted July 26, 2009 Author Report Share Posted July 26, 2009 it says 513m06475 so that means its .75 over? Quote Link to comment Share on other sites More sharing options...
dwet6 Posted July 26, 2009 Author Report Share Posted July 26, 2009 cool Quote Link to comment Share on other sites More sharing options...
SAVAGE420 Posted July 26, 2009 Report Share Posted July 26, 2009 Sorry, on my pistons i meant .20 over and NOT .50 over....lol Yours are still .30 over though. Quote Link to comment Share on other sites More sharing options...
XxMeltIcexX Posted July 26, 2009 Report Share Posted July 26, 2009 I would recommend having the pistons matched to the bore by a reputable builder. Most likely if you need new pistons, instead of just rings, you should have it honed at the least. Not to mention bored if its out of round - which it most likely is. If you don't go that route you need to check the piston to wall clearance for sure. Quote Link to comment Share on other sites More sharing options...
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