<VV> Will my newfangled 'ring compressor' contraption work ?

[jvhroberts at aol.com]

If you're using a tapered sleeve compressor, it needs to match the 
bore. The ones which have a gap and are springy have more forgiveness, 
but whatever you use, the rings need to be fully compressed to the bore 
size or smaller, or the pistons won't go in.

John Roberts

-----Original Message-----
From: Jim Houston <jhouston001 at cfl.rr.com>
To: virtualvairs at corvair.org
Sent: Tue, Nov 16, 2010 11:03 pm
Subject: Re: <VV> Will my newfangled 'ring compressor' contraption work 
?


Will only be EXACTLY the right size if the sacrificed cylinder has the
same bore as the others...  if target cylinder is standard, and the
"tool" comes from a .060 cylinder, might not work because it won't
compress the rings enough...  or am I thinking funny??

Jim Houston

On 11/16/2010 9:31 PM, Charles Lee wrote:
> Yes, agreed, as nearly everyone pointed out !  That's the way I was 
doing it
> in 'practice' and it was a bear on the bench.
>
> The main point of this whole thread is the custom compression tool 
that I'm
> going to make as soon as I get an extra barrel to cut in pieces !
>
> Regardless of the way the piston is installed, I was really trying to 
see if
> this newfangled tool I want to make is of any use :
> www.yourbuyersinn.com/Cars/Corvair/CorvairTools.htm
>
> It seems better that adjustable ring compression tools because it's 
EXACTLY
> the right size ?
> (I edited it  bit so if you already saw it, it may have changed ?)
>
> Thanks for all the insights (it's great learning at the hands of the 
patient
> folk on VV) !
> Charlie
>
>
> ----- Original Message -----
> From:<corvairduval at cox.net>
> To:<virtualvairs at corvair.org>
> Sent: Tuesday, November 16, 2010 3:50 PM
> Subject: Re:<VV>  Will my newfangled 'ring compressor' contraption 
work ?
>
>
> I also vote for "C", assemble the piston into the barrel and then the
> assembly is installed into the block, just like GM did it with 
cylinder
> assemblies.
>
> But...
>
> Suppose the engine is already assembled and you just take a head off 
and OH
> NO, a cylinder pulled off the piston, or you just want to remove the
> cylinder to install Helicoils in pulled studs...
>
> You need to use option "A". Use a "take apart" ring compressor.
>
> I use a Lisle waffle style compressor that comes apart, 21700.
>
> http://www.lislecorp.com/divisions/products/?product=93
>
> It works either way the piston is going into the barrel.
>
> Your solution may work, except there is a lot of force on those rings 
you
> need to hold in with those two pieces of cast iron. How many hands do 
you
> have? Maybe a hose clamp to help? And, there is the missing metal 
from the
> two saw cuts, may be an issue, maybe not. The VW people have a solid
> tapered ring to install pistons into barrels to form the assembly to
> install into the engine. It is not a "take apart" style being a solid 
taper
> part.
>
> http://www.vwparts.net/JCRCOMP.html
>
> Anybody use the K-D Tools set that uses locking pliers and bands to
> compress rings? It is definately "take apart" style. Looks 
interesting and
> expensive...
>
> http://www.sjdiscounttools.com/kd850.html
>
>
>
> It seems you could mount the cylinder in a vise and use two 
screwdrivers to
> hold the rings in while pressing the piston in, but just try it by
> yourself! ggg
>
> I have used gear type hose clamps on small pistons. Just make sure 
the ring
> ends don't line up with non banded areas.
>
>
> Frank DuVal
>
>
>
> Original Message:
> -----------------
> From: Charles Lee Chaz at ProperProper.com
> Date: Tue, 16 Nov 2010 15:05:05 -0800
> To: virtualvairs at corvair.org
> Subject:<VV>  Will my newfangled 'ring compressor' contraption work ?
>
>
> I'm practicing using a 'ring compressor' and this thing is NOT easy 
!!!
>
> First question (Select correct answer) :
>
> A) The piston is installed onto the crank and the cylinder barrel 
slipped
> over it
> B) The cylinder barrel is installed into the crankcase and the piston 
is
> slipped into it
> C) Either (A) or (B)
>
> The problem with (A) is that the ring compressor may be too long to 
fit
> between the cylinder barrel and the crankcase, to slip the cylinder 
barrel
> over the installed piston, and the ring compressor would need to be
> disassembled after the piston is installed.
>
>
> (B) seems easier because you can see what you're doing better, and 
the ring
> compressor won't need to be disassembled after the piston is 
installed.
>
> I have a solution that may have been tried already ?
>
> Here's my idea (unless someone thought of this first ?)
> Cut about a 2" - 3" band off the 'bottom' of a cylinder barrel and 
cut that
> into 2 semi-circles.
>
> Use that contraption to squeeze the rings as the piston is installed 
using
> either method (A) or (B) above ?
>
> www.yourbuyersinn.com/Cars/Corvair/CorvairTools.htm
>
> Has anyone already tried this ?
>
> Charlie
>
>
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