Questions about reinstalling head

[Dan Bozga]

I haven't had a chance to reassemble the 200, but I would like to thank you guys for all the good information you've provided. I will be sure to to use it when the the time comes to put the head back on (in a week or two I hope).

Happy Easter!

Dan




________________________________
From: Adam Gratz <adamgratz at gmail.com>
To: 200q20v at audifans.com
Sent: Sat, March 27, 2010 12:15:18 AM
Subject: Re: Questions about reinstalling head

>
> Tony-
>

I've had gaskets fail after using several different "Coating" materials.
Copper gasket spray, silver metallic paint, I hear all kinds of suggestions.
I wouldn't use anything. The factory doesen't. Sometimes the enemy of "Good"
is "Better".

Always use new head bolts. Not worth the risk. I use q-tips and brake-cleen
to clear out the block threads of any oil or coolant. When you torque the
head bolts, you will compress whatever (Non-compressible) fluid is left in
the bolt holes and can potentially crack the block. I did it on my first BMW
head job. Don't forget a light coating of assembly lube on the bolt threads.

Back to the books,

doc-

1991 20vTQ Avant Jungle Racer
1986 BMW 325 ic
1996 MBZ s600 da limo
1991 MBZ s500
1988 Cheby Suburban with Cummins Diesel Veggie oil burner
1981 MBZ 300 TD wagon Veggie oil burner

>
> Message: 1
> Date: Wed, 24 Mar 2010 21:46:02 -0500
> From: Tony Hoffman <auditony at gmail.com>
> Subject: Re: Questions about reinstalling head
> To: Dan Bozga <audisport44 at yahoo.com>
> Cc: 200q20v at audifans.com
> Message-ID:
>        <7bd5cbf01003241946r2c2bfa25r5f20c9006de28057 at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> I never use an additional sealants on heads. The torque pattern is in
> the bentley. I have reused head bolts on probably thirty or more VAG
> products, but technically they are stretch bolts, which are designed
> to be a one-time use thing. On newer cars, or one that you are running
> higher boost, I'd definately replace, however.
>
> Tony
>
>
> On Sat, Mar 20, 2010 at 11:33 PM, Dan Bozga <audisport44 at yahoo.com> wrote:
> > Ok,
> >
> > So I'm about to reinstall my freshly machined and lapped head and I had a
> few questions...
> >
> > Do you guys use?any additional sealants on?the head gasket or just
> install it as is?
> >
> > Are the head bolts ok to be reused if in good shape?
> >
> > I have the bentley, but haven't looked into it yet, I assume the torquing
> pattern and values are listed?
> >
> > Thanks in advance,
> >
> > Dan
> >
> >
> >
> > _______________________________________________
> > 200q20v mailing list ? ?
> http://www.audifans.com/mailman/listinfo/200q20v
> >
>
>
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> End of 200q20v Digest, Vol 77, Issue 21
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