GregBBRD

I'm one that says no....

But it is better than guessing.

Note that different belts have different stiffnesses. The Porsche tool works great with the Porsche belt (or Gates....Roger and Gates claim it is exactly the same as the Porsche belt) You install one of Roger's racing belts or one of the crappy aftermarket belts and the required tightness is going to be a completely different number.

Bjbpe

ROG100 asked me to post info on my failure. The first failure, a few years back, was a sudden failure of the seal with a huge gush of coolant under the hood. I admit to driving way over the limit on I-91 in Vermont. No details on the model of pump etc. as I never saw it. Replaced at the local garage.

This latest failure was of the timing belt pulley sleeve which broke off the pump. No leak. Just a pump that is now a piece of junk. The impeller was metal which might explain a failure of the sleeve; maybe the impeller was slightly out of balance.

Which brings me to a question. The replacement pump has a boss that projects off the face by a half inch or so with a drilled and tapped hole into which goes another takeup piece. The pump that failed is machined such that the boss is essentially level to the casting face and has a slightly larger tap. It was easy enough to machine off the long boss and re-tap the hole. What I am wondering is why the difference.

Mrmerlin

post a picture,
maybe you cut off the extra support bar mount of the new pump design

ROG100

Bjbpe,
Thanks again for the info but it would be most interesting to know if your later failed pump was new or rebuilt and the manufacturer.
Roger

ROG100

I never use a Porsche or Kemp tool just fit a PKensioner and forget about it 8>)

Bjbpe

As I indicated earlier, I never saw the 90 mph pump as it was replaced by a shop. This happened some time in early or mid 90s before we moved out to Wyoming.

I have to admit that I am getting quite aln education on Porsche pumps. The one that is going into the car as I speak was purchased on ebay and has the projection that I was referring to. It does have a metal impeller.

With all of this recent info I am, of course, somewhat concerned about this whole pump situation. As I mentioned in an earlier note, I've done quite a bit of pump design, usually positive displacement gear pumps but also some centrifugal units. It is true that a steel impeller is going to have more impact on bearings and seals (both) than a plastic one, especially when balance becomes an issue. As I also mentioned, I don't drive fast any more which could be a saving grace.

If you check out ebay looking for 928 parts you will see the pump I have purchased for about $150.00. As a very, very old coot, I am pretty conscious of $$$$$ as social security and pension money can only go so far especially given that Clinton and Obama have wrecked what was a pretty good IRA. (Democrats can ignore the last sentence; I don't mean to start a war.)

ROG100

For $150 it will either be a poor quality rebuild or a Beck Arnley/Hamburg Technic Chinese knock off.
Not a good choice and the metal impeller will likley come off and eat its way into your block.
Your choice but not a good one

SeanR

I've pulled a few of these off cars with less than 5k miles. Whatever you do, do NOT install a Hamburg Technic pump. It's Chinese junk and you might as well pay the mechanic to do the job twice.

docmirror

Send it back. I tried a few parts from Hamburg Technic and they are all junk. Made in either China, India, or another junk-hole. The 928 water pump is not a place you can go cheap.

Mrmerlin

as others have said your putting a bomb into the car dont do it!
get a good pump from Roger and worry about other ways to cut your costs

namasgt

Don't use that pump ! Either buy a new Laso from Roger with plastic impeller or the Porsche one which also has a plastic impeller...

dcrasta

<Smh> Does everything have to be political or did you somehow forget how to use the 'edit' button ?

Too bad you purchased the pump before asking. The false short-term thinking of saving a few $$ on an Ebay pump, because you 'dont drive very fast' will soon turn expensive. I wonder if the previous pump was a 'castoff' counterfeit.
As a registered Democrat I would suggest you return the waterpump and purchase one that will not eat your block up from one of our vendor sponsors (cough-Rog100-cough).

ROG100

If you really want a good WP I will sell you one at cost because I would rather see a good WP on your car than a KO.
It will not be $150 but less than $300.

GregBBRD

A word of advice.....DO NOT INSTALL THAT PUMP!

The Hamberg Technic pumps beside having poor press fit of the pulley and the impeller also have a bearing "cartridge" that is not made to handle the "load" of the cam belt. These pumps are assembled with a "double ball" bearing "cartridge" (the cheapest water pump bearing made.) The high loads of the belt require a roller bearing/ball bearing "cartridge". There has to be a set of roller bearings to handle the load of the cam belt on one end of that "cartridge" and a set of ball bearings to handle the "thrust load" on the other end.

You'd do better to find an old used pump that the bearings felt good on.....SERIOUSLY!

GregBBRD

You are a class act, Roger!