Burning Oil?

[Derek Pulvino]

Woops, maybe should have done a little closer reading of that email...

Derek P

>Derek,
>Replacing valve guides requires head removal. A head overhaul, automotive
>machine shop facility. Yes, the exhaust guides tend to wear more than the
>intake guides because they run hotter. When guides are replaced the stem
>seals are always replaced, so unless guide wear is measured and actually
>excessive, it was the seal replacement that likely solved the problem, not
>new guides. Exhaust valve stem sealing is not critical because there is not
>a large pressure diff across the seal as there is across the intake seal,
>which can suck in oil thru a bad seal.
>
>So, inasmuch as you have to tear down externals to remove the head, before
>doing so one can measure valve guide wear and decide if seal replacement is
>all that is necessary.
>
>Bernie
>
> > From: "Derek Pulvino" <dbpulvino at hotmail.com>
> > Date: Mon, 09 Oct 2006 09:37:28 -0700
> > To: patrick.anderson1 at comcast.net, eric.huppert at us.army.mil,
> > Jeff.Bernstein at pneumaticscale.com
> > Cc: 200q20v at audifans.com
> > Subject: Re: Burning Oil?
> >
> > How long did that job take you?  And I've heard the same about valve
> > guides...exhaust going a little quicker than intake.
> >
> > Derek P
> >
> >> As for idling in traffic causing a little smoke. I had that symptom and 
>by
> >> replacing the exhaust valve guides I fixed the problem. From what I 
>hear,
> >> the intake guides don't go bad as quickly as the exhaust ones.
> >>
> >> Patrick