Water Pump Wear Mystery-Solved?

["Scott Mo." <scottmo@teleport.com>]

Phil,

>Phil Said
>Equally sorry, but the only person on this planet whom I would trust to
>tell the difference between a 113-tooth water pump and a 120-tooth water
>pump by visual inspection is Claire Marsden - Adam Marsden's wife at AM
>Cars.

Later Phil said:
>Because I've seen it before - exactly the same symptoms on an ur-quattro.
>It's a classic problem because the parts are pulled at chassis (VIN)
>level but quite a few cars have the 'wrong' engine in them.  It's also
>possible to swap from 120-tooth to 142-tooth if you change all the
>accessories - one car at least that _I_ know of has had this done.

Ok, now you have my interest, are you saying that the 113 tooth belt and
the 120 tooth belt BOTH have square cut teeth? What applications are these
belts used on?

The late style 142 tooth belt off my MC-2 engine does have the rounded
"super Torque" style.

I also have a new timing belt for the 4 cyl engine used in the 1985 Audi
4000S, it has a part number of 056-109-119A and it has 121 teeth!

Does anyone have the belt off a 1986-88 5000T/Q or early 89 200TQ  (square
cut) they can count the teeth on. Phil, does the MB engine use the 142
tooth belt or the 113? 120?

Nothing worse than a square cog in a round hole
Cheers
Scott Mockry

http://www.teleport.com/~scottmo