90-95 Power steering pump solution
 

Howdy. Passing this information onto the brotherhood. Cliff please save this info. When sourcing a power steering pump for an early 90 or 91 Z a power steering pump appears the same as a standard pump on all C4s 84 up to a 91. You will see this at Ecklers and Rock auto for instance.

They are not.. The power steering pumps ARE ZR-1 specific. if you are not getting a cast iron vs aluminum body its not the right pump as the bosses and threaded portions are wrong.

So. SOLUTION?.. Volvette.com has a 90-95 Power Steering rebuilt pump part number 4PS80D there is a core charge but its is a cast iron body like the original. To the left you see the rebuilt cast iron pump. Pics 2 and 3 are the aluminum incorrect replacement next to the old pump.


BOTTOM LINE UP FRONT?.. Power Steering pumps for ZR-1s are ALL ZR-1 specific for the 90-95 model years.
GC. :cheers:

Re: 90-95 Power steering pump solution
 

Thanks for the heads up.

Re: 90-95 Power steering pump solution
 

No problem..if I can save a forum brother time and effort..it is worthwhile. Even GC buys the wrong part from time to time.

The pump is buried under the motor?.. So until you are in there and you have the part in hand, it is hard to know. GC

Re: 90-95 Power steering pump solution
 

GC,

Did your power steering pump fail? Any idea what caused the failure? If due to age, how many miles?

Re: 90-95 Power steering pump solution
 

Thanks, GC.
That's great info!

Re: 90-95 Power steering pump solution
 

Yes it was leaking at the 154k point

Re: 90-95 Power steering pump solution
 

Great information. Yep, avoid the ?Fits 1990-1995 ZR-1? from places like Corvette Central. I picked one up and had to promptly send it back. Indicated in great detail that they are carrying the wrong part. Still up for sale on their website. Not sure who is in charge of their parts supply but they aren?t familiar with ZR-1s. Just rebuilt mine like I should have in the first place.

Re: 90-95 Power steering pump solution
 

It's the same all around EBay, Rockauto, autozone etc... fits ZR-1

This is why this information needs to reside HERE as the subject matter experts for the ZR-1 brotherhood. This is why this is here to SHARE....

GC :saluting:

Re: 90-95 Power steering pump solution
 

91 CorvetteZR-1: Did you use a rebuild kit ? If so where did you source it?

Re: 90-95 Power steering pump solution
 

Hi. I need to replace my pump apparently and just read the post about the aluminum replacement pumps not fitting correctly. I see that Corvette Central advertises the pumps for ZR-1s now on their website. They look to me to be aluminum ones..can you advise if these would then not fit now or do you think they may have corrected the fit since 2 yrs ago when the original post was written??

Re: 90-95 Power steering pump solution
 

I would not take the chance and suggest getting your leaking OEM pump rebuilt.

The one I ordered from volvette was reversed geared as for a Cadillac Northstar. I informed them of the problem and returned em for a refund. Did they correct them ? I have no idea. I would not want to relive the 4 installations it took me to determine the problem but the place I had the original rebuilt determined the components were reversed internally by design. Again for a Cadillac Northstar vs a LT5 ZR-1 Corvette. Bluntly it was a total PITA.

Re: 90-95 Power steering pump solution
 

Hello all,
I just installed a modified aluminum ps pump that was modified by TurnOne in Saginaw, MI (989-759-4206). I talked with Mark and he was extremely helpful.
The whole process was not a particularly easy job (5 hrs), but the TurnOne modified ps pump fit perfectly and, so far, is performing flawlessly. I'm very pleased after reading the ps posts here and being unable to find either a used or OEM replacement. Fair warning: it's releatively costly as it's a custom modification so it fits and works.

Re: 90-95 Power steering pump solution
 

Information is saved in Post 5 - ZR1 Drive Train

Thanks Daryl :cheers:


STEERING
90-95 Power Steering Pumps Are ZR-1 Specific
Power Steering Pump Repair Kit
Replacing Power Steering Pump TIPS
Make Your Own Power Steering Lines TIPS
Sources of Fittings for Power Steering Lines TIPS
Loose steering column TIPS
Dimmer Switch TIPS
Replacing tie rods
Tie rod dust boots
Rubber bushing kit
Tilt Steering column wobbling
Removing air bag
TurnOne

Re: 90-95 Power steering pump solution
 

Thanks people!!!! Mechanice thinks it MAY just be the ps inlet hose which I just ordered and received from Corvette Central!! In the meantime just add fluid when needed :)