Date: Thu, 22 Jan 2004 02:47:33 -0500
Reply-To: Jonathan Farrugia <jfarrugi@UMICH.EDU>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Jonathan Farrugia <jfarrugi@UMICH.EDU>
Subject: Re: cylinder hone question
In-Reply-To: <006601c3e080$9a141930$0fce3ad8@FirstLaptop>
Content-Type: TEXT/PLAIN; charset=US-ASCII
way back in the day when i was still considering rebuilding my 1.9 i took
it over to the local auto machinist that i had used for other projects in
the past with good results. more precisely i took over the pistons and
sleeves to see if they could be reused since i was tight on money. we got
out the spec book, the good quality dial bore gauge, and the micrometers.
we checked every item and then had this discussion. in my case the
sleeves had little wear on them after 100,000+ miles. we arrived at the
conclusion that if i built the custom hold downs to hold the sleeves
true to the tool bed. the sleeves could be cut down with a good new
hone enough to get a fresh surface to seal new rings and still be inside of
the vw spec. i never took him up on the project but to this day i still
believe it would be possible if you were on a tight budget. of course
realize this was with my sleeves in good condition and that you will
never get the longevity and possibly the performance of quality new
items.
jonathan
On Wed, 21 Jan 2004, zolo wrote:
> It it is bored and honed to the next size, obviously you would have the next
> size pistons. If you go to that kind of trouble, you would take the heads
> in for redoing them with new guides and recut the seats and grind the
> valves.
> After all, the heads are the ones that seal the power.
> Zoltan
> ----- Original Message -----
> From: "John Rodgers" <jh_rodgers@BELLSOUTH.NET>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Wednesday, January 21, 2004 3:42 PM
> Subject: Re: cylinder hone question
>
>
> > Ideally, the cylinders should be bored to remove the shoulder, then
> > should be honed to give it a new cross-hatch. Before all that is done,
> > the cylinder should be miked to see if they are going to be in spec
> > after all that work.
> >
> > Regards,
> >
> > John Rodgers
> > 88 GL Driver
> >
> >
> >
> > Scott W. wrote:
> >
> > > I am in the process of rebuilding a 1.9L, and am just
> > >about ready to clean up the pistons and hone the
> > >cylinders. So my question would be-is there anything
> > >specific I am going for here, or is a person just
> > >doing this to give the rings fresh wall to scrape? I
> > >can see the old hone at the top and bottom of the
> > >barrels where the rings never passed over, so am I
> > >just trying to ruff up the cylinder walls or what?
> > >Thanks
> > >Scott W.
> > >
> > >__________________________________
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> > >
> > >
>
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