Power steering hose replacements/substitutes

[1991 Corvette ZR-1]

Originally Posted by Roadster

I don't thing that is anything to be concerned about Jamall....I have the same on mine in that area....I think that is the color of the sealant that was used for the heads and cam covers when assembled.....

I believe it is leaking around the bolt. I cleaned this whole area up over a week ago and it was all nice and dry. I came out today to find a tiny wet area where the oil has drained onto. I think this might be why it was rough back behind the PS pump. Attached a photo of what it looked like when I removed the PS pump last week.

[A26B]

That is a plug for the hole in the cylinder head used to access the Secondary Cam Timing Chain Guides. There is one on the front of each head.

They are sealed with a dowty washer which usually doesn't leak. You could try tightening it up to see if it might be a little loose.

Here are a couple of links for the Plug/Bolt and the Dowty Washer seal.

https://www.jerrysgaskets.com/plug-s...new-90-95-7b1/

https://www.jerrysgaskets.com/seal-s...t-90-95-7-5c2/

[1991 Corvette ZR-1]

Originally Posted by A26B

That is a plug for the hole in the cylinder head used to access the Secondary Cam Timing Chain Guides. There is one on the front of each head.

They are sealed with a dowty washer which usually doesn't leak. You could try tightening it up to see if it might be a little loose.

Here are a couple of links for the Plug/Bolt and the Dowty Washer seal.

https://www.jerrysgaskets.com/plug-s...new-90-95-7b1/

https://www.jerrysgaskets.com/seal-s...t-90-95-7-5c2/

Thanks, Jerry. I will try and tighten but it sounds like I might get the washers seals to use while I have access. So sounds like I can remove that bolt without issue to install the new washer. Good to know!

[Roadster]

Originally Posted by 1991 Corvette ZR-1

I believe it is leaking around the bolt. I cleaned this whole area up over a week ago and it was all nice and dry. I came out today to find a tiny wet area where the oil has drained onto. I think this might be why it was rough back behind the PS pump. Attached a photo of what it looked like when I removed the PS pump last week.

Was thinking about a slightly different area....my bolt is dry....so hopefully no future leaks.....

[1991 Corvette ZR-1]

Alright, guys time to come clean. I chickened out of reusing my factory pump. I was confident in every part of the teardown and rebuild except for that dowel pin in the bottom of the housing. And the FSM provides no instruction on how the pressure plate orients onto it. So I ordered a new pump from Corvette Central specified for the 90-95. There is just one problem: it is NOT for a ZR-1. No threaded holes on the housing and the back is squared off instead of having clearance needed to fit into the recess on the cylinder head as it is bolted to the engine with the bracket. Do not buy from the following.

https://www.corvettecentral.com/c4-8...ump-new-564425


I will inform them that it does not fit....who knows if they will actually remove it. So on Monday, I will have to send it back for a refund. May I ask if anyone knows a reputable source that actually sells rebuilt/new PS pumps that will for a fact fit? Before anyone suggests just sending mine to Turn One, I would rather not wait a month to get it back. Good news is the rack came back today. What I MAY do, is give Jr or a tech a call there to discuss the vague rebuild info concerning the dowel pin to pressure plate connection.

[Roadster]

How did the rack rebuild turn our Jamall....was it just the standard rebuilt or were any other parts found that needed replacement???

[1991 Corvette ZR-1]

Originally Posted by Roadster

How did the rack rebuild turn our Jamall....was it just the standard rebuilt or were any other parts found that needed replacement???

It was the standard rebuild. The rack rebuild must have went well because they never called me. I just got an update via email that a shipping number was generated for me. They installed the urethane bushings I sent in my box. One thing, and this is not a big deal, is the aluminum housing was not cleaned. It actually looks like the rack was never opened, except for the new bushings and new dust boot tie straps. I know they ran all the parts through a liquid cleaning process, but not the extra step of blasting the aluminum this time.

If I had to guess, it probably was not Jr who rebuilt my rack this time. I spoke with him over the phone on an 85 rack years ago that had some custom quick ratio parts put into it and he was doing that one personally. When I got that one back, it looked like a brand new rack. Again, not a big deal, as long as it does what it is supposed to. If you or anyone send a rack in, best to include a note that you want that extra cleaning step even if it cost a little extra, if you want that factory fresh look.

[1991 Corvette ZR-1]

Alright, my cynical side says there was at least one person watching me flail around in this thread that knew the answer to my question but was giving me some tough love letting me figure it out. Well I got in contact with someone at Turn One, exchanged some emails with pictures and got my answer. The dimples on the side of the pressure plate which face the front of the housing: either one can be used to place onto the dowel pin recessed into the housing.

Also, the FSM states this with pictures but I?ll also add the pump (part which contains the vanes) has a side that is a smooth bore (counter bore) and a side with teeth. The toothed side of the pump faces the back of the PS pump. Posting this with pictures on the random chance someone else was on the fence about rebuilding their PS pump. It was not hard at all. So it is going back together and going back on the car.

[Roadster]

Originally Posted by 1991 Corvette ZR-1

Alright, my cynical side says there was at least one person watching me flail around in this thread that knew the answer to my question but was giving me some tough love letting me figure it out. Well I got in contact with someone at Turn One, exchanged some emails with pictures and got my answer. The dimples on the side of the pressure plate which face the front of the housing: either one can be used to place onto the dowel pin recessed into the housing.

Also, the FSM states this with pictures but I?ll also add the pump (part which contains the vanes) has a side that is a smooth bore (counter bore) and a side with teeth. The toothed side of the pump faces the back of the PS pump. Posting this with pictures on the random chance someone else was on the fence about rebuilding their PS pump. It was not hard at all. So it is going back together and going back on the car.

So did you do anything specific when you took the pump apart??? still thinking about if I should attempt to do mine...

[1991 Corvette ZR-1]

Originally Posted by Roadster

So did you do anything specific when you took the pump apart??? still thinking about if I should attempt to do mine...

Nothing too bad. I replaced all the O rings and the bearing on the drive shaft. I used compressed air on the tube coming from the bottom of the pump to pop the rear cover off. The only thing with this is everything else came out with the cover. The vanes are rounded on both sides, so there is no specific way they have go into the pump.