'89 200 quattro with wrong water pump.?

Question

This model Audi had a change in the motor mid-production and it switched timing belts from square teeth to rounded "super-torque" belts. The VIN number was supposed to be the determining factor as to which version of water pump you needed.

So following the VIN number we ordered the newer version of the water pump with teeth for the round timing belt and it is the wrong one.

After consulting with my Audi "Expert", he said that as long as it was not jumping the belt it would be fine.

After the installtion of the water pump, the car is building too much pressure in the cooling system and all the coolant is being sent out the radiator cap relief valve.

Here is the one we needed:
http://www.autozone.com/R,3019598/vehicleId,1028701/initialAction,partProductDetail/store,2776/partType,00095/shopping/partProductDetail.htm

And here is the one we got:
http://www.autozone.com/R,370480/vehicleId,1028701/initialAction,partProductDetail/store,2776/partType,00095/shopping/partProductDetail.htm

If you notice, the diameter of the gear in the one we got is smaller than the original. I would think that would spin faster and could possibly be the cause of the problem.

I wanted to know what you all thought...

Jack · Accepted Answer

The one you put in has a smaller pulley that spins faster and over pressurizes the system. Sorry I know it's a pain but you have to change it out and install the correct pump. Next time and in all circumstances carefully compare your parts. Autozone? compare it a few times especially aftermarket remanufactured parts that someone else returned 20 times before you got it.

uthockey32 · Answer

There does not appear to be enough of a diameter difference to cause the pump to raise the pressure the way you say. Have you checked to make sure you're radiator is not plugged?

Trending News

'89 200 quattro with wrong water pump.?

2 Answers