[V8] CD shop manual

[7013885254]

There is going to be little luck with any of the aluminum high zinc content blocks (pt,abh, abz, etc) because their bores are acid treated to leave a strong zinc face.  Makes it tough to do anything to.  Due to this audi considers the shortblock a 'throw away' unit since any damage to the bores screws you.

The ABH is the easier between the H or Z and gives you more power pretty easily.  That's the biggest benefit.  The ABZ is newer and also more common than the ABH and may be more preferable due to this.  Not going to have a lotta luck re-boring any of themM but you can always ask a machinist using the info you have about the block.

Either way, there are other little upgrades you could do while doing this.  Even a 5 speed.
---- Original Message ----
From: "John Gourley" <azaudi at gmail.com>
Date: 8/13/09 6:54 pm
To: "V8 Audi Fans" <V8 at audifans.com>
Subj: Re: [V8] CD shop manual
7013885254  said........................

>Hey,
  >  Well I've looked into it a bit as well, and honestly it looks like a
swap is much better >than a rebuild.  You can get gasket sets, re-ring the
engine, and use VR6 main and rod >studs as well.   But honestly I'd look at
an engine swap to an ABH  or ABZ 4.2.  Its been >done and may cost more but
your chance of success is many many times better.  Check > motorgeek as well
as search here heavily.

>As always good luck




A followup question or two related to your comments.  The V8 quattro is a
model I haven't worked on.   My wife drives a 91 100 front wheeler and my
old workhorse is a 1989 200 turbo quattro avant........so some of the
technical stuff on the V8 is new to me.

You mention the ABH engine as being a possibility for a swap.  What is there
different (besides the obvious engine displacement) that make the ABH a
candidate for a swap while the PT seems to be a lost soul!   For whatever
reason are more parts available for the ABH and also  the shop manual that
covers the ABH engine, does it cover rebuilding info with the short block,
unlike the PT?   I guess my question, did Audi consider the ABH short block
to also be unrebuildable?
Is there an advantage of using the later 4.2  ABZ engine rather than the
ABH..........other than a better chance of having fewer miles, and I assume
more hp?

Also thanks to Scott for the info on the shop manual regarding lack of
information on the PT short block

John Gourley
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