#1 ask chuck to borrow his ring end gap filing tool! it's nifty and does a
super job of squarely filing ring end gaps with a diamond dust wheel in a
ring holding fixture.
#2 check end gap by putting ring squarely into bore by inserting ring into
bore then use new piston to push ring square in bore. then feeler gauge end
gap. (most production rings are near spot on, but ya never know and never
just assume they are! chances are you will not need to borrow the tool!)
yes square end gap is importaint. why? because they expand when hot and
the gap closes up increasing the seal of the ring. if the end gap is
irregular the ring will not achieve a proper seal when hot . now it
probably will not expand and sieze in the bore or fracture the ring but the
excessive area from the irregular end gap will cost some compression and you
have come way too far to fool around at this point in the operation!
gawd! i feel like the "shell answer man" (uh-oh! dated myself on that
one.....like who even remembers those comercials on tv anymore.....or their
whole line of "answer brochures" wich were free at the shell stations.....)
chuck.
----- Original Message -----
From "Chris King" <cbking at alum.rpi.edu>
To: <spridgets@autox.team.net>
Sent: Thursday, February 06, 2003 8:23 AM
Subject: tech Q, piston rings
> My flat-top pistons finally arrived yesterday!
>
> Quick question - I'm planning on checking the ring end gaps in the bores
before assembling the rings into the bores. I'm assuming everything'll be
OK, but should I have to remove a small amount of material, what's the best
way to go about it? is squareness of the end important?
>
> TIA
>
> -=Chris
>
> Chris King - cbking@alum.rpi.edu
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