Re: Super Torque Timing Belt

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <199811282037.PAA14216@coimbra.ans.net> "Scott Mo." writes:

> To add some further detail:

Yet more follows.

> According to the parts fiche I have, the change to the new style timing
> belt on the MC 10V Turbo engine occurred in 1989 at 44 VIN KN004457. The
> fiche shows this change from the 034-109-119 square tooth belt to the new
> 074-109-119 belt which according to the Audi parts counter dude, is called
> the "Super Torque" version. This is the same belt  part number used in the
> 2.3 liter NF engine as found in the 100Q and 80Q.
>
> The parts fiche for the 3B 20V Turbo engine in the 1991 200TQ only shows
> one timing belt available, the 034-109-119A. Is this the part number you
> finally received from Linda at Carlsen?
>
> The parts fiche shows the same crankshaft timing belt gear and water
> pump/pulley for the MC and 3B engine after VIN 44KN004457, so the Super
> torque belt was in use on both these engines.

With the greatest respect to yourself, and with a lot less to Audi, the
parts microfiche is bollocks - at least with regard to the MB
implementation.

This is just an example - but I have no doubt that the same might well
be true for 1989 MC engines ...

The microfiche says:

035 109 119              -> 85-D-902 500  113Z
034 109 119 85-E-900 001 -> 85-J-900 643  120Z
074 109 119 85-J-900 644 ->               142Z
074 109 119                               -Super Torque- Allum Engine

('Z', BTW, is probably the German word "Zahn" - tooth.)

85-J-900643 is actually registered with the UK club, and is an 'anomally'
car (there are lots) in that the engine number (MB001138) is some two
hundred lower than you'd expect.  85-J-900642 has engine MB001377.

The real problems occur at chassis 85-J-900746 (+/- 2).  At that point,
the engine suddenly regresses (746 has MB001515, 748 has 1373) and it
looks like Audi used up a batch of around 50 back-level engines.

The problem arises because the parts microfiche _STUPIDLY_ keys the
belt part number from a chassis breakpoint, not an engine breakpoint.
Where back-level engines were fitted (in mid-1989 for the MB ur-quattro,
and very probably during the same time frame for the MC engine) this
system _INEVITABLY_ results in the wrong timing belt, water pump and
harmonic balancer part numbers being 'picked' for a number of 1989 cars.

Audi know about this, and have done nothing.

--
 Phil Payne
 Phone: 0385 302803   Fax: 01536 723021
 (The contents of this post will _NOT_ appear in the UK Newsletter.)