[s-cars] Head Gaskets, Bolts, Water Pumps and Stebel Canons, Oh My

[Fred Munro]

Hi Manuel;

The rebuilt pumps from the Audi dealer use the Audi aluminium housing and
are rebuilt in Italy with 5-vane plastic impellers. If you look at the end
of the shaft you'll see "Italy" stamped on it. I installed an aftermarket
German pump that used a 7-vane aluminium impeller - it also has more pumping
capacity than the Audi pump due to the extra vanes.

Fred Munro
'94 S4


-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com]On Behalf Of
manuelsanchez at starpower.net
Sent: March 17, 2005 10:11 AM
To: s-car-list at audifans.com
Subject: [s-cars] Head Gaskets, Bolts, Water Pumps and Stebel Canons, Oh
My


S-Heads,

Daag, when it rains it pours.

Head Gaskets

Is the RS2 head gasket all metal or a composite of metal and
fiber?
Is the stock AAN head gasket all fiber or a composite?

Bolts
Anyone know the current ball park pricing for

Stock Stretch Bolts
ARP Studs

Waterpumps
Do all German made pumps have some sort of ID Number
stamped/cast on them?
Do all German made pumps have metal impellers?

Seems as though I've been hosed by an out of state wrench.  I
bought my avant almost 2 years ago with 99k miles on the
clock.  The PO hadn't done the the T-belt service and one
condition of sale was that the car make it to a shop of my
choosing without grenading the head.  I gave specific
instructions after hearing the chatter on Italian made pumps
that I wanted a German pump installed.  I waited an extra 3
weeks and paid premium $ for the "german" pump.

I noticed an unusual noise under the timing belt cover last
week and could visibly see the cover move in and out from the
block.  The bearing on the water pump is toast, seems as
though the T-Belt was overtightened as well.  The pump has
absolutely no markings on it at all and has a plastic
impeller.  World Pac sent over a Graf pump (which apparently
is italian made) and it also has no markings but it does have
a metal impeller (hence the question about whether german
pumps could have a plastic impeller).

Since the front end of the beast is apart I'm going to redo
the entire T-Belt service with only 30K on the parts.  We
noticed a oil leak on the rear of the block,  on the passenger
side.  The half moon gasket is leaking but unfortunately there
seems to be a small leak from around the head joint.  So being
the overly cautious bastard I'm trying to decide which head
gasket to place in there.

I've heard some opinions that the composite type head gaskets
seat better than all metal ones (if there are such things, I
don't know) since all metal obviously can't compress I guess.
 So what's the scoop on the composition of the stock AAN head
gasket and the RS2 version (Part number would be great if you
got 'em).

Then of course comes the stretch bolts vs ARP studs can of worms.

The good news is that with Miss Piggy's snout completely torn
off I can access the 2 wimpy hunks of metal that pass as
horns.  I imagine it will be easier to place the soon to be
ordered Stebel canon in its place.  PK, did you mount yours in
the stock location or elsewhere?

Anyway, all opinions welcome on how to proceed.

Regards,

-m

95.5 S6 Avant (RS2 less cams and MAF) MRC Chipset on other stuff
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