Power steering Pump Question. - ZR-1 Net Registry Forums

gbrtng · 09-01-2019

NAPA used to stock rebuilts ... apparently used on other GM vehicles because there was one at the local store in Naperville. NAPA did not have a way to cross reference to the other applications however. Probably a Geo or Malibu ...

Ccmano · 09-17-2019

So here’s an update. Internet/Ebay sellers were all out of stock, even though they were running current ads. I suspect many used the same source. None of the local parts outlets have stock including NAPA.

This part is IMPORTANT! The only pump currently available is the one sold by RockAuto and others manufactured by the LARES company in Minnesota. You can buy them new or rebuilt. THEY DONT FIT! The reason the don’t fit is because the two lateral mounting holes (of three) are not threaded and are too large on their pumps. I ordered one from RockAuto, opened the package and found the holes unthreaded and too large. I called LARES and the nice folks there told me it was a mistake, to send it back and another would be sent. I did that, got the pump and it was identical to the first. Called the nice folks at LARES back (they really are nice), this time they told me that based on the GM specs they use the holes are not threaded. WRONG! I’ve done a bunch of these, all three holes are threaded. That second pump is going back too. No new pump coming.

So at present if you need a PS pump you will need to either send it to TurnOne or LARES and have it rebuilt or rebuild it yourself. Mine was a bad bearing so I’m rebuilding it myself. A complete kit is less then $20.

As previously noted these pumps are unique in that the rotate clockwise (when viewed from the front) whereas L98 pumps rotate counterclockwise. Looks like we may be adding another part to the scarcity list.
H

A26B · 09-18-2019

Quote:

Originally Posted by Ccmano

......................................So at present if you need a PS pump you will need to either send it to TurnOne or LARES and have it rebuilt or rebuild it yourself. Mine was a bad bearing so I’m rebuilding it myself. A complete kit is less then $20........................................
H

Great job doing all the research to be able to solve this parts "NLA" delimma. Do you have a source & PN for the "complete rebuild kit?

Thanks Hans!

Ccmano · 09-18-2019

Quote:

Originally Posted by A26B

Great job doing all the research to be able to solve this parts "NLA" delimma. Do you have a source & PN for the "complete rebuild kit?

Thanks Hans!

The kit is from “AutoPartsGeek” via EBay, $18.96 Shipped, a US company, Parts are from USA, Mexico and Taiwan.
H

Five sources of ZR1 (90'-95' ZR-1) Power Steering Repair Kits are provided each having 7 parts (one extra "O" ring in each kit over that shown in Kit # 8401401).

Edelmann Power Steering Repair Kit 73198ZF

Gates Power Steering Repair Kit 1819XP

Sunsong Power Steering Repair Kit 8401344

Edlemann Power Steering Repair Kit 8561

Sunsong Power Steering Repair Kit 8401344[/QUOTE]

Ccmano · 09-18-2019

So I replaced the front bearing and seal. Works like a champ! The shaft and bearing are held in from the front with a C-clip. Once the C-clip is removed the shaft and bearing pops out with little effort. This exposes the front seal. The seal is a press fit, some judicious prying and it popped out. The new seal went in with an appropriately sized socket to gently hammer it in. The bearing has to be removed from the shaft with a press. The clearance from the inner race to the shoulder of the shaft has to be measured and noted before disassembly so that the new bearing can be pressed to the same clearance. A half inch drive long socket of the appropriate size to press from the inner race did the trick to press the bearing off. Similarly a socket to support the inner race of the new bearing is used when pressing the shaft on to the bearing, noting the clearance to the shoulder of the shaft. Once together the shaft and bearing pop back in and the C-clip is replace to hold it together. That’s it. The rear seals can be accessed from the other side. Mine wasn’t leaking so I left it alone. Looks like the rebuild is pretty straight forward. I think I’ll be rebuilding these moving forward. They usually just leak or have a bad bearing. BTW the full rebuild process is written up in the FSM under “Unit Repair” of the Power Steering Pump.
H

09-01-2019	#1
gbrtng Join Date: Feb 2006 Location: San Antonio area Posts: 1,179	Re: Power steering Pump Question. NAPA used to stock rebuilts ... apparently used on other GM vehicles because there was one at the local store in Naperville. NAPA did not have a way to cross reference to the other applications however. Probably a Geo or Malibu ... __________________ “Buy the best example of what you want, and pay whatever it takes. That way, you cry only once.” ~ Bruce Meyer

09-17-2019	#2
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Power steering Pump Question. So here’s an update. Internet/Ebay sellers were all out of stock, even though they were running current ads. I suspect many used the same source. None of the local parts outlets have stock including NAPA. This part is IMPORTANT! The only pump currently available is the one sold by RockAuto and others manufactured by the LARES company in Minnesota. You can buy them new or rebuilt. THEY DONT FIT! The reason the don’t fit is because the two lateral mounting holes (of three) are not threaded and are too large on their pumps. I ordered one from RockAuto, opened the package and found the holes unthreaded and too large. I called LARES and the nice folks there told me it was a mistake, to send it back and another would be sent. I did that, got the pump and it was identical to the first. Called the nice folks at LARES back (they really are nice), this time they told me that based on the GM specs they use the holes are not threaded. WRONG! I’ve done a bunch of these, all three holes are threaded. That second pump is going back too. No new pump coming. So at present if you need a PS pump you will need to either send it to TurnOne or LARES and have it rebuilt or rebuild it yourself. Mine was a bad bearing so I’m rebuilding it myself. A complete kit is less then $20. As previously noted these pumps are unique in that the rotate clockwise (when viewed from the front) whereas L98 pumps rotate counterclockwise. Looks like we may be adding another part to the scarcity list. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. Last edited by Ccmano; 09-19-2019 at 09:43 PM.

09-18-2019	#5
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Power steering Pump Question. So I replaced the front bearing and seal. Works like a champ! The shaft and bearing are held in from the front with a C-clip. Once the C-clip is removed the shaft and bearing pops out with little effort. This exposes the front seal. The seal is a press fit, some judicious prying and it popped out. The new seal went in with an appropriately sized socket to gently hammer it in. The bearing has to be removed from the shaft with a press. The clearance from the inner race to the shoulder of the shaft has to be measured and noted before disassembly so that the new bearing can be pressed to the same clearance. A half inch drive long socket of the appropriate size to press from the inner race did the trick to press the bearing off. Similarly a socket to support the inner race of the new bearing is used when pressing the shaft on to the bearing, noting the clearance to the shoulder of the shaft. Once together the shaft and bearing pop back in and the C-clip is replace to hold it together. That’s it. The rear seals can be accessed from the other side. Mine wasn’t leaking so I left it alone. Looks like the rebuild is pretty straight forward. I think I’ll be rebuilding these moving forward. They usually just leak or have a bad bearing. BTW the full rebuild process is written up in the FSM under “Unit Repair” of the Power Steering Pump. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. Last edited by Ccmano; 09-19-2019 at 09:46 PM.