si_bat

well today we had a debate @ the shop. (we are honing the block)
2 of the guys say you can put .1 over or .2 oversized rings on a standard sized piston and it will work fine.
the other 2 of us say it wont work right...
what is the truth to this?
stock gsr piston.. std rings =
.1 over = ???
.2 over= ???

951BRO

how long dp you need the motor to run? how aggressive was the hone, it all matters dude, not all hone jobs are the same, how many times has it been rebuilt or honed?

slowcivic2k

Honing an old bore is a really stupid idea in my mind, just bore it out and match a new piston to the hole, the last thing you should be worrying about is the rings, that piston is gonna slap more than it should. piston to wall clearance works best at .001" and they really don't like to see over .0025". It's kinda like playing with fire.

Why did it need to be honed anyways?

HCivicSi23

haha... honeing is ligit dude. It's a good idea to reset the milage marker on that engine practically back down to 0. I would have them hammer in some new aluminum sleves where the honed away the cylnder to reduce it back to a stock diameter cylinder hone. If they do that, just get the OEM specification sized piston rings and assemble to motor back together. If you leave the hone oversized, you will run the risk over cracking the block and what not.

si_bat

first hone never been bored..
had to be honed due to dropping a valve and piston mashing it into the old head... and piston got a hole in it . scared the cylinder walls a bit.. so we honed it.. and so far by the book we still meet specs..

951BRO

then run oem size, .1 over and .25 over are bore specs

si_bat

problem is there is very very little scarring left..
and one guy wants to hone it a little more and use std piston with a .010 over ring..
i say it wont work but he swears up and down it will..
will this work? what damage will it cause ( aside from burning oil).
also what could result from the scarring in 1 cylinder? ( it is very very light)

soon2bdropped

bump i'd like to know

slowcivic2k

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by si_bat &raquo;</TD></TR><TR><TD CLASS="quote">problem is there is very very little scarring left..
and one guy wants to hone it a little more and use std piston with a .010 over ring..
i say it wont work but he swears up and down it will..
will this work? what damage will it cause ( aside from burning oil).
also what could result from the scarring in 1 cylinder? ( it is very very light)</TD></TR></TABLE>

Your piston is gonna slap around a lot, and i cant even begin to think of what your compression numbers would look like, it would be too hard to tell. Of course it will work, look at rednecks using .020" shims to make up for cut clearances on a head, and the head gasket ends up being .040" or more thick, personally I don't even know how the gasket doesn't blow out. It probably wont work too well, and definitely wont last too long if the piston to bore clearance is too great, it will simply beat itself to pieces.