[Vwdiesel] Welp

[James Hansen]

Yeah, what's the piston clearance spec on these for a fresh bore and hone,
it's like a hair bigger than nothing, like 2 thou or something in radius.
I should also mention, it pays to check your ring end gap. Put the fresh
ring into the bore and push it down with a piston to about an inch from the
top. You have to have some gap between the ring ends.  Dunno what VW spec is
on that, its worth looking up, but I wouldn't hesitate to be in or around
.020" not knowing the called for spec. Seems big, but if it ever heats up,
they can touch and the lands get pushed off the top of the piston from the
sticking ring.
Just another one of those things that should be checked but rarely are. I
know of 3 stock car motors that died from that very thing last year, just
too much hurry, not enough time to do it right.

What hone did you use Loren? Dingle ball or flat stone?
-james

> -----Original Message-----
> From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com]
> On Behalf Of LBaird119 at aol.com
> Sent: Friday, August 06, 2010 12:18 AM
> To: vwdiesel at vwfans.com
> Subject: Re: [Vwdiesel] Welp
> 
> In a message dated 8/5/2010 11:10:20 PM Pacific Daylight Time,
> jhsg at sasktel.net writes:
> 
> > There's a right way, and errr... a right way. All the
> > rest tend to give results that vary from the desired outcome.
> >
> 
>   Speaking of which...  I know you said you can't afford pistons
> and rebore but, there's so little wear limit on these engines that
> if you have a ridge, you're out of spec.  If you're out of spec,
> new rings don't control oil very long (30K miles give or take) and
> then you're back at it again.
>   I had poor luck with reringing and that was on engines with little
> to no ridge.  The one that did well still spec'd out like new even
> with 100K on it.  The others all were at or beyond wear spec.
>    Loren
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