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Hello Folks,
Jack here from Colorado... I'm getting a 77 back on the road and noticed that the previous owner removed the power steering pump, lines and brackets.. I ordered a pump and brackets through E-Bay and decided to work on it today... The pulley has a 5/8 in. opening with a key way in it... The pump has a 3/4 in. shaft with no key way. All these parts are suppose to fit my 77, but obviously something is wrong.
Can someone help with what pump shaft size or what pulley size came with this 77?
One last thing, was the original pump the rounder style, and does it matter if the replacement one is shaped more like the later models?
Thanks,
)))--Jackb--->
Last edited by c3vettesforever; Apr 21, 2018 at 03:25 PM.
Reason: forgot to add a question
I love EBay but they can't be trusted to get the correct yr, make, model specific.
Obviously you ordered the wrong one. The pump can be had at NAPA, rebuilt, for a song. Just have to find somebody to swap the pulley on to the rebuilt unit. Do not use a puller, you will warp it for sure. The old unit will be your core charge and save your fill cap.
Also, there are two "O" rings that install under the pump mounting studs first. Then put a dab of thread sealant on the studs, then snug them up. Those threaded holes must go into the reservoir, I guess.
Last edited by HeadsU.P.; Apr 21, 2018 at 03:29 PM.
I love EBay but they can't be trusted to get the correct yr, make, model specific.
Obviously you ordered the wrong one. The pump can be had at NAPA, rebuilt, for a song. Just have to find somebody to swap the pulley on to the rebuilt unit. Do not use a puller, you will warp it for sure. The old unit will be your core charge and save your fill cap.
Also, there are two "O" rings that install under the pump mounting studs first. Then put a dab of thread sealant on the studs, then snug them up. Those threaded holes must go into the reservoir, I guess.
Thanks...HeadsU.P.
I added another question on my post after you answered... Was the original pump the older round looking one or more like the squared off on the top type like they sent me? Or does it even matter?
I have seen there are two types. For yours and my '77, you need what I believe is called the Saginaw unit. I would call it "pear" shaped. I do not recall the shaft size.
Snoop around on some Vette supplier web sites or NAPA and you will see pictures of the two types.
Last edited by HeadsU.P.; Apr 21, 2018 at 05:03 PM.
I have seen there are two types. For yours and my '77, you need what I believe is called the Saginaw unit. I would call it "pear" shaped. I do not recall the shaft size.
Snoop around on some Vette supplier web sites and you will see pictures of the two.
And by the way, the bracket itself is cast iron.
Pear shaped might be the better description... Thanks for the info... Will visit with Napa Monday morning! The bracket they sent me is steel and it has a 2nd bracket that bolts to the motor mount...It seems to hold the pump in place, it's just since the pulley doesn't fit I thought I'd do some more research.
Thanks,
)))---Jackb--->
Its critical you purchase the correct pump or you will not have the clearance to get the filler cap on / off, and which has the dipstick too. Some of those GM pumps are too tall at the fill tube.
I had a small shop remove my old pulley. Guy just barely hit it with a torch and off it came. Then keeping the pulley hot, it slipped onto the rebuilt pump. (No nut on my '77 Saginaw) When using heat you must be carefull not to damage rubber componets.
Maybe you can get your money back from EBay. For general car parts EBay is fine. But for special or specific parts the seller is usually unaware about fitment issues.
And I do recall a steel bracket going to the pump and must be the cast iron bracket went to the ALT.
Last edited by HeadsU.P.; Apr 21, 2018 at 05:03 PM.
I'm fairly sure I have that bracket to the motor moubt on my 68. Let us know if you want some pictures.
Originally Posted by c3vettesforever
Pear shaped might be the better description... Thanks for the info... Will visit with Napa Monday morning! The bracket they sent me is steel and it has a 2nd bracket that bolts to the motor mount...It seems to hold the pump in place, it's just since the pulley doesn't fit I thought I'd do some more research.
Thanks,
)))---Jackb--->
I'm fairly sure I have that bracket to the motor moubt on my 68. Let us know if you want some pictures.
Do you all agree that the correct pump is pear shaped? Does anyone know if the power steering pump shaft is 5/8 or 3/4 in.? I bought a chrome pulley from Mr. Gasket that shows it's for a 77 Corvette... It has a key way and is 5/8 in.
Carrilijc...If you can send me a photo I'd appreciate that. jackanddiane999@msn.com
Thanks to all...I want to finish painting it soon and start enjoying it.. 2 1/2 years in the making!
)))---Jackb--->
Its critical you purchase the correct pump or you will not have the clearance to get the filler cap on / off, and which has the dipstick too. Some of those GM pumps are too tall at the fill tube.
I had a small shop remove my old pulley. Guy just barely hit it with a torch and off it came. Then keeping the pulley hot, it slipped onto the rebuilt pump. (No nut on my '77 Saginaw) When using heat you must be carefull not to damage rubber componets.
Maybe you can get your money back from EBay. For general car parts EBay is fine. But for special or specific parts the seller is usually unaware about fitment issues.
And I do recall a steel bracket going to the pump and must be the cast iron bracket went to the ALT.
Yes the cast iron bracket does hold the alternator... Sounds like I need the same pump as you have...Jackb
Just saw this.... let me go get a picture... pictures of bracket from power steering pump to motor mount are below....
I went and compared a 68 PS Pump with a 77 PS Pump on the autozone website. According to that website the 68 had a "Keyway" for the pulley and the 77 was "press on" for the pulley. Take a peek.
What is the part number on that pulley without a keyway? We can check to see what it is supposed to go to.
Originally Posted by c3vettesforever
Yes the cast iron bracket does hold the alternator... Sounds like I need the same pump as you have...Jackb
Last edited by carriljc; Apr 22, 2018 at 02:34 PM.
carriljc,
I thought I saw a speck of dust in your engine bay, but it was on my laptop monitor.
My concern is, if c3vettesforever purchased the correct pump. As I recall, one has a tall fill port, and the Saginaw I believe has a short fill port. And that one should fit. Not sure what EBay sold him.
Last edited by HeadsU.P.; Apr 22, 2018 at 03:02 PM.
I have a replacement pump on my 77 now with a different style filler neck. My original pump pictured. Both pumps give little clearance for fluid maintenance. The shaft size is 3/4". The brackets should be all small block 63-82. I rebuilt my original pump using Gates #350390 about $15.00. My pulley is pressed on.
Last edited by bmotojoe; Apr 22, 2018 at 04:52 PM.
I can see where the replacement would be a son of gun trying to get the cap off unless your Alt is on the passenger side. Even on a stock unit you only have minimal space to get your hand in there.
Just saw this.... let me go get a picture... pictures of bracket from power steering pump to motor mount are below....
I went and compared a 68 PS Pump with a 77 PS Pump on the autozone website. According to that website the 68 had a "Keyway" for the pulley and the 77 was "press on" for the pulley. Take a peek.
What is the part number on that pulley without a keyway? We can check to see what it is supposed to go to.
The pulley from Mr. Gasket via Ebay is #4948G It says it's for "Early GM & Chevy 1976-84 with keyway and 5/8" shaft.. I guess I should have ordered the pump first to see what shaft comes with it, but when it said 76-84 I thought I was home free. Not sure what # pulley to order, but at least I know the diameter.....
Thanks so much for your help!
)))---Jackb---> Colorado
I have a replacement pump on my 77 now with a different style filler neck. My original pump pictured. Both pumps give little clearance for fluid maintenance. The shaft size is 3/4". The brackets should be all small block 63-82. I rebuilt my original pump using Gates #350390 about $15.00. My pulley is pressed on.
The pump they sent me looks like yours....It measure a tad over 8 in.. from the bottom to the top where the cap goes. Thanks again for your help!
)))---Jackb---> Colorado
The pulley from Mr. Gasket via Ebay is #4948G It says it's for "Early GM & Chevy 1976-84 with keyway and 5/8" shaft.. I guess I should have ordered the pump first to see what shaft comes with it, but when it said 76-84 I thought I was home free. Not sure what # pulley to order, but at least I know the diameter.....
Thanks so much for your help!
)))---Jackb---> Colorado
I have found over the years that the asterisk should be used more often when parts suppliers state their fitment. Example:
Fits all 1976-1984 Chevys / GMs and all SBC 1963-1982 * *(except blue Corvettes, red Corvettes, yellow Corvettes, black Corvettes, Corvettes with tires, Corvettes w/ 4-speeds and Corvettes w/ auto)
77 L82 Power Steering Pump Replacement
