Non-T TBelt compatibility:10V vs 20V

[DeWitt Harrison]

Don't know about the JT motor but with the change from the 5000CS to the 10V
200, in the 1989-1990 time frame, the 10V turbo motor switched from the
MC(1) to the MC(2) which, among other things, changed the tooth design of
the TBelt. And so also of the water pump, cam and crank pulleys. So I
suggest being cautious here. Perhaps you could remove the TB cover and
examine the situation or hit the family album to check the respective parts
lists. If, for example, the water pumps for the two motors have different
p/ns, then everything else the TB touches will likely be different as well.
Except the idler which has a smooth pulley.

DeWitt Harrison
'88 5ktq

On Wed, 27 Oct 2010, ldc007usa at yahoo.com wrote:

> Is the timing belt hardware (H2O pump, idler, belt) for 10V non-turbo
engine (JT) compatible with that of the 20V non-turbo engine (7A)?

>From looking at pictures as per AutohausAZ.com and others, it appears that
the idler is the same for both. Can't tell on the timing belt.

>  The H20 on the 20V, however, lacks the lips(?) on the edges as seem on
the 10V.

>  I need to change the timing belt and relevant hardware on my 1991 Audi
20V (7A engine code) and have a spare kit in hand for a 10V engine and was
wondering which parts are compatible.

> Thanks in advance for your input.
>
> -Regards
>
> -Louis