[kwikt]

Just wondering if anyone has resealed their power steering pump. Mine has been leaking for a while and thought about buying the reseal kit and doing it myself. It can't be that difficult!!!!

Kevin

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[SILVY968]

It looked simple to me as well and I was able to find seal kits, but the price of a rebuilt pump was so cheap that I went that way.
Brian

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[apex]

One of the first jobs I ever did on the car was to rebuild the pump - quite easy using info and a rebuild kit found on the web.

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[kwikt]

Well I picked a rebuilt one from autozone with life time warranty for $158 plus $40 core. I just may keep my old one and get a reseal kit so I'll have a spare.

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[rxter]

The local PM used the reseal kit on my leaker about 6 months and 2,500 miles ago. Cost $50 as I recall for the kit. He was not happy with it for some reason and did not charge me. All I can tell you is that the Italian restuarant on my garage floor is gone, so I am happy. I think he was going to charge me $100 to $150 labor, so it looks like a toss up on the $.

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[bbirrell]

Was it the OEM ZF or an off-brand? How hard was it to take off, reinstall?

Many thanks,

Bill Birrell

1994 968 Coupe

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[Cloud9...68]

I just finished re-sealing my car's power steering pump, and I have one question: My pump's inner seal (can't remember the exact name for it, but it's the distinctive-looking seal that's shaped like a butterfly) only had one piece, the rubber one. The youtube video from Rennbay describing the re-seal of a 944 pump said to use both of the pieces of the seal that came with the kit, the rubber one, and the thinner hard plastic one. I went ahead and used both, but I'm not sure that was the right thing to do. Are our pumps supposed to have both the rubber and hard plastic seals, or just the rubber piece? Thanks.

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[banditsc]

Our pumps are 944 pumps. The only different pump that was made was for the 944 S which had a electrical connection to kick up the idle when the wheel was turned to full lock.

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[Cloud9...68]

Yes, I know, which is why I found it odd that there was a mismatch in terms of the butterfly-shaped seal between what was described in the youtube video for the 944 pump re-seal, and what I observed when I took my pump apart. Also, the video said to place the plastic piece on the inside of the rubber seal, but there's no way it fits that way. So, I put the seal pieces together the way they appear to fit best, and placed them in the groove. It seems to fit nicely, so that's the way I put it together. It's always possible that my pump was assembled incorrectly at the factory, which may be why it's leaked so badly for quite some time now.

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[bombfactory]

Yes, both the plastic and the rubber butterfly seals need to be used. I don't quite remember, but I think I mounted the plastic piece inside the rubber piece when I did mine.



The only real difficulties I had with the pump reseal were breaking the little c-clip that holds the shaft in place - I couldn't find another c-clip small enough to fit in the small space available, so I ended up grinding off the ends of a regular size c-clip. Seems to be working.



Also, while I was dealing with the c-clip adventure, I accidentally dumped all the little sliding metal vanes (the things that actually move the fluid - not sure what they're called) out of their slots. This wouldn't be a problem except they have one squared-off edge and one slightly radiused edge, and I didn't observe which side faces out before they all fell out. This is not addressed in the YouTube video other than 'don't let these little pieces fall out'. I should have taken pictures!



So, does anyone know for sure which way these metal pieces are supposed to face? I put mine back in square edge facing out, and now I'm worried that might be backwards. Or maybe it doesn't matter?



Here's a drawing of what I'm talking about:

   

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[Cloud9...68]

Austin,



Good point - amazing graphic, too - how the heck do you do that?!. I had the same thing happen; getting that clip out was a real bear - must have taken me a solid hour - and in the process of the rebuild, I dropped all of those little metal vanes out of their slots. Many are the pitfalls of disassembling parts from a 19-year-old German sports car. I didn't notice that there was a difference in their edges, so you raise a great question, but one I can't answer, I'm afraid. Anybody else done this?

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[bombfactory]

Hopefully I'm stressing over nothing, but at first I thought, maybe there's a reason why the slots that the metal vanes fit into are rounded on the inside, maybe the rounded edges of the vanes face inward to match. Then I thought, centrifugal force pushes the outer edge of the vanes against the wall of the pump, maybe the rounded edges face outward so they slide along the wall easier. Then I thought, maybe the vanes all started out with square edges on BOTH sides and the outer edges got worn down and rounded off by 120k miles of friction, so in the end I put the square edges facing out. I have no idea which way is correct - someone please ease my suffering!



-Austin

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[Cloud9...68]

Austin,



Did you ever get an answer to your question about the correct direction of the the metal vanes in the power steering pump? My power steering doesn't work - no noise, not jerking or inconsistent feel, just no power assist whatsoever, so I'm wondering if I guessed wrong as to the direction of these vanes when I put the pump back together. Anybody know the answer to this? Don't imagine it will be showing up on Jeopardy anytime soon...

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[Cloud9...68]

I sent an email to Travis from Rennbay asking him about the direction of the vanes, and he said the rounded ends should be pointed outward, and that doing it the other way could significantly reduce the output pressure of the pump. After I figure out my tail light problem (or throw in the towel on it), I'll start troubleshooting my power steering.

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[bombfactory]

Glad we got a definitive answer on this - thanks Cloud! Guess I'll be re-opening my ps pump - I faced the square edges out dammit!

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[Lear35A]

The Baka-yoke method of design would not allow such a reversal to even be possible. Porsche was late coming to that table. Wiedeking pushed them to it kicking and screaming, but too late for the 968.

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[bombfactory]

Agreed. Why not just make both edges curved??

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