Wow, I must have missed these posts, or else I forgot 'em. I thought I was
the only nut doing ring lapping. I used powdered jewelers rouge mixed
with kerosene. I think Bon Ami has diatomaceous earth in it, and I think
Jewelers rouge does too. I've never been able to find it in stores. I
always used to hear of people putting it in the oil or dumping it in the
carbs to get a bad ring to seal. Never had the nerve to try it though a
friend did with his Honda 750---seemed to work.
I always used a jig because I found piston grooves to be too loose--the
rings would chatter when you tried to lap them. Might be the particular
pistons though. And I had this lathe and nothing much else to do with it.
-----Original Message-----
From: Rikrock@aol.com [mailto:Rikrock@aol.com]
Sent: Tuesday, April 02, 2002 8:08 PM
To: fot@autox.team.net
Subject: Lapping/Seating Piston Rings
Amici,
What follows is a message Kas posted to the list a while back.
Rich Rock
Pottstown,PA
> From: kaskas@earthlink.net
>
>
> Because of a bunch of inquiries on the lapping business, this is what I
> did.
>
> After assembly of the rings to the pistons and the honing of the
sleeves:
>
> I used a mixture of BonAmi and 30 weight oil just gritty, not a paste.
I'd
> coat the assembled rings with this mixture, insert into the sleeve and
give
> it ten strokes , remove from the sleeve and dip into a deep pan of gas
(or
> thinner) and carefully turn the rings on the pistons to remove the brunt
of
> the compound, then go to 3 more seperate pans of clean lacquer thinner
then
> finally a bucket with hot soap suds. Blow dry and quickly spray the
> assembly
> with WD-40. All the while being very carful not to "spring" the rings in
> any
> way and of course you do not remove the rings. Remember to number the
> sleeves so they match the ring and piston sets. Clean the sleeves in
much
> the same manner. This saved a lot of run-in time on the dyno and gave by
> far the best performance.
>
> ----- Original Message -----
> From: "Jack W. Drews" <vinttr4@geneseo.net>
> To: "R. Kastner" <kaskas@earthlink.net>
> Sent: Wednesday, June 20, 2001 12:41 PM
> Subject: Re: Total Seal rings
>
>
> > "R. Kastner" wrote:
> >
> > > In the end to make the most power I found it best to
> > > lap the rings into the bores of the sleeves on the bench then fit to
> the
> > > block.
> >
> > --What a very neat idea. I'm going to try it on the next rebuild. What
> did
> you
> > use as a lapping compound? Valve grinding compound?
> >
> > uncle jack and New Blue
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