Quote:
Originally Posted by ROG100
Never EVER EVER use a rebuilt pump - even a Porsche rebuild as Porsche NA has them rebuilt by the same company that produced all the failures. Rebuilds are handled through Porsche NA in Atlanta and certainly do not come from the factory in Germany. Most parts are built by the parts suppliers as Porsche only assemble cars and do not make parts.
This warning is for other conscientious 928 owners who are interested in heeding good advice from the 928 community.
Buy a good quality NEW pump and it will probably be the last one you have to buy. At each TB change remove the WP and check it for bearing wear - if good re-install it with a new gasket.
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Quote:
Originally Posted by ROG100
As you seem very incapable of understanding some of the basic facts I will try again to enlighten you.
New pump from GPM in Germany has a German made seal cartridge. GPM does not rebuild pumps so rebuilt pumps are rebuilt by a totally different company and they use a different seal cartridge - cheaper and low quality - We sent a number of pumps to GB and he dissected them all - reported on Rennlist - search is your friend.
Every time a WP is rebuilt the fits are compromised. Hence the seal cartridge moving in the casting. Hence the metal impeller's coming off the shaft.
I know of at least 6 different casting used for 928 water pumps - some are good quality and some are not - its a crap shoot what you will get.
Every time someone sends back a core - it could be a cheap Chinese knock off core -so the one you are getting could be really bad.
You asked for advice and then totally disagreed with everything you were told. Why the F**ck did you ask for advice in the first place is beyond my comprehension.
All Porsche parts come from three main warehouses here in the States - Atlanta, Ontario and the North East. The three warehouses are fed from the main warehouse in Stuttgart. Porsche does not make parts their suppliers do.
I only do about $1m of parts business with Porsche so what would I know about how the system works.
All Porsche parts have a warranty of 2 years/24k miles. That warranty is usually only honored providing the parts are fitted by a Porsche dealer. Even if they do honor the warranty they will only replace the part or give you your money back. So $188 will go a long way to replacing the engine in a 928 because of a seized water pump!!!!!!!!!!!!!!!!!!!!
Now that you have advised everyone to use a cheap rebuild I am sure you will cover the cost of engine rebuilding if and when their pump fails 8>(.
I have to believe that most 928 owners are little bit more savvy than you appear to be.
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Quote:
Originally Posted by harborman
You can bring a horse to water but you can't make it drink. After all is said and done it looks like the final decision will be the cheap, rebuilt pump.
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DON'T.
The force/load on the 928 water pump bearing is significant. Unlike most other cars, this bearing is subject to the force/load of the cams translated through the cam gears/sprockets to the belt, and hence the pump's bearing.
I'll answer your subsequent post here and say 'no, you'll have to remove the engine to get the cylinder heads off'.