993 Power steering pump removal

[macula]

Im relatively new to 911's and unfortunately my PS pump is leaking. I was hoping to find a DIY on an engine-in power steering pump removal. Is it necessary to remove the cam shaft gear wheel? Or can I just try to remove the three M6's on the PS pump gear wheel and slide the pump back?

Thanks

[Green993]

This is a very tough DIY because it's hard to get at the 4 bolts w/ the engine in the car. You do not need to remove those three bolts. Go over to this link.

Power steering pump DIY ? - Rennlist Discussion Forums

[Vandit]

Perelet goes over it at a high level in his oil fixes thread. Engine in the car.

http://forums.pelicanparts.com/porsche-964-993-technical-forum/644446-964-oil-leaks-fixes-thread.html

I'm assuming the 993 pump setup is similar to the 964.

[macula]

Thanks for the info. I will be addressing this issue over the weekend if parts are delivered on time. I believe that the 964 and 993's setup is similar. I think most 964 pumps were ZF and most 993 pumps were by LUK. Some 95 993's came with ZF pumps which can be rebuilt by the kit Pelican sells. To best of my understanding, this kit doesn't work on LUK pumps.

[aigel]

Unless I'd own a lift, I'd just drop the engine. Usually there are more things you can address while the engine is out. If you read that 964 article, you can see that an awful lot of stuff is coming off for access.

That's just me - I certainly would give posters who have done a pump replacement engine-in-car more weight. I will be curious to hear how you went about it this weekend. Good luck!

G

[iamtheari]

Dropping the engine is pretty intimidating, from my perspective, because you have to disconnect so many things and connect them correctly weeks or months down the road when you've had time to finish all the projects. Plus, without a lift, a lot of the parts you have to remove to go through Perelet's oil leak fixes with the engine in the car would have to come off to get the engine out anyhow, probably including the rear bumper.

I am also curious how the steering pump will go. I am planning to do that on my 964, as well, and hope I have the presence of mind to take pictures to share to either scare away or encourage future brave souls.

[aigel]

Did the heat exchanger come off in the 964 writeup for access to the pump or was it for other reasons? That's one part that can stay on when you pull the engine. It is also a part that can really ruin your day, if the hardware does not want to budge.

True - the rear bumper needs to come off either way, unless you have more than standard jackstands and a few wooden boards.

G

[iamtheari]

Perelet indicated the HE's came off to get to the oil pipe from the filter console to the engine. But he indicated that they were already off when discussing the steering pump, so they probably do need to come off to get to it from below.

[macula]

This was not a fun job. Good thing is that most of the work was possible to do from the top. I do have the advantage of a lift at home which helped. Once the three nuts were off and power steering pump gear removed, the four mounting screws were accessible (especially the bottom two) and pumped was pulled back.

[iamtheari]

What all did you have to remove first? Shock absorber? Heat exchangers? I am not looking forward to taking mine (964) apart at all.

[Vandit]

I honestly don't think the heat exchanger needs to be dropped. Hopefully perelet can chime in.

[perelet]

Sorry, sometimes I do not read forums often. Email is best way to reach me.

I also, don't think you'll need to take HE's off, I already had them off when I got to pump. On 964 i had to take rear strut off.

But overall, it takes less time to take wheel off and see what's there on 993 compared to week long discussion on the net.

You are looking for enough clearance to fit impact on lower (camshaft) bolt, or if your wife is nice enough to sit in the car and push brakes - you just need breaker bar.

When puting things back - please put lower gear same way it came off (is is assymetrical and will break) and you WILL need your wife to push brakes when you torque it.

Oleg.

[macula]

The HE's didn't need to come off for my car. Neither did the cam shaft pulley. The passenger rear wheel and Shock assembly was out as I am in the process of replacing all four shocks and springs. This is on a 993, not sure how much the 964's differ.

[perelet]

Originally Posted by macula

... Neither did the cam shaft pulley...

You probably want to take pulley off and replace seals - seal will leak oil, no way around it.

Oleg.

[macula]

100% agree with you, Oleg. In this particular situation, the PO had the O-ring and seal replaced at the dealer recently while the engine was out for a reseal. I just wished that the PS pump leaked while the motor was out.

[iamtheari]

How much removal, hassle, and/or special tools are required to get the shock out of the way to get to the pump (and back in again)? I am not replacing my shocks, just fixing leaks.

[IL75]

I managed to get pump out with removing engine. Was a big pain
Rubber seal at pulley end I guess shrank and didn’t provide a tight enough seal so dumped all the power steering fluid on the floor.
I did have to drop engine slightly to help remove the pulley cover off. I have a 95 c2 cab and it was one piece with this annoying ledge that protudes out. Engine drop was necessary to create space to remove that. In 964 the pulley cover is 2 piece which would have made life a lot lot easier.
Also the belt is pretty tight so I put it all back with the belt on the pulley. I can provide more detailed instructions if needed. Bought replacement seals from powersteeringseals.com. Expensive but service was great.
Oddly Bentley instruction manual says it’s possible to get access to the pump by removing the wheel lining?

[IL75]

PS - would also recommend loosening rear seat bar to help with access to the cover plate from underneath

[IL75]

*sway