89magic98

There was just an older style waterpump listed on ebay (brand new) for $25. Nobody wants them anymore. I think the auction ended (can't find the listing).

I have a brand new timing belt roller for the non-updated pumps listed on ebay, for a really good price:

http://cgi.ebay.com/ebaymotors/ws/eB...tem=2471427793

PCinDC

Wow thanks for the information everyone. Looks like it would be folly to reuse this pump, so when I do my belts, I'll be replacing with a new or rebuilt unit.
What are the visual differences between the early and the late pump? I would assume that my 86 has the early style pump. How much of a headache is it to change to the new style pump?

Thanks again everyone.

89magic98

A new waterpump has a ~6" metal guard that fits over it, that keeps a _way_ overly loose timing belt from rubbing itself. A properly tensioned timing belt does not need the guard, in my opinion.

To upgrade to the new pump, you will have to purchase this guard as part of an "update kit" (usually around $60). I think you will need to use a Dremel to slightly modify the top timing belt cover to make it fit.

If going from old to new waterpumps, you will also need to change the smooth roller on the timing belt (it needs to be a different size for the new waterpump).

The old roller/idler is 32.0 mm, Porsche part number 944.105.273.02, for old-style water pumps without belt guards (944.106.021.13 or 951.106.021.01).

This part will _not_ work for cars with updated water pumps with belt guard (951.106.021.10). For that, you need the 46.2 mm roller, part number 944.105.241.03.

Hope this helps!

PCinDC

Definitely does help, thank you!

89magic98

I just went through this - having the wrong new roller, needing to order a new one.

Thankfully, the new roller could be installed just by taking the top cover off.

Techno Duck

Make sure you get all the correct parts for updating the waterpump or at the very least make sure you have a running car to go get the parts. I made that mistake when updating everything on my car. The dealer i went to gave me the wrong rollers a few times, i made about 5 trips that one day getting the parts sorted out. My father left the shop for a few hours and the mechanics car was getting a new alternator...so basically no running cars to make the trip to the dealer. I ended up using the Corvette my father was rebuilding...no headlights and it wasnt even registered.

Also take note that when updating to the new style pump, you will need to modify the rear timing cover. The dealer should have a service bulletin on it. I recommend outlining the cutout in chalk and not trying to eyeball it like me. Nothing a dremel or recipricating saw cant handle.