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Power Steering Pump Replacement - Any hidden snags?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by beefcake83, May 25, 2001.

  1. beefcake83

    beefcake83 1/2 ton status

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    Well, Gonna replace the power steering pump tomorrow... they're usually pretty straight forward, but i was just wondering if on the K5's, if there's anything in particular to watch out for or anything that I might run into that may give me trouble. Just wanna be prepared before it's all tore apart. Thanks, Gary

    Gary Graham
    '83 GMC Jimmy 350 'Beefcake'
    Eielson AFB, Alaska
    Metallica & Mountain Dew
    http://community.webshots.com/user/beefcake83
     
  2. Boss

    Boss 1/2 ton status Author

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    On your K5 it should be quite simple. (the newer models (89' to 91') with the alternator on the Driver side, are a PAIN IN THE ASSSSSS!!!!! Just got done doing this, that's whay I know. But your alternator is on the Passenger side, so yours will be much easier.
    First, Remeove belt. Then you must have a PS pulley puller/installer, and use that to remove the pulley. Remove the pressure hose/and return hoses. Then remove the bolts that hold the bracket to the reservoir and remove it all. Then unscrew the two bolts on the back of the res. Then the one large one that the pressure hose went into. There is a spring and something else in there that will fall out. remove em. Now, tap the hell out of the PS pump shaft with a rubber mallet. This may take a while, but it will go. Then reinstall the new one in reverse order. If you had a an 89' and up model...I would be worried :)
    Boss

    <A target="_blank" HREF=http://www.boss.coloradok5.com>http://www.boss.coloradok5.com</A>
     
  3. Panther

    Panther 1/2 ton status

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    OK Boss, worry for me and tell me all the snags I'll hit on my 90 when I do it.
    [​IMG]

    <font color=blue>"It's just a differentialator....Totally unnecessary" [​IMG]</font color=blue>
     
  4. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    Pain in the Ass on a 91 fer sure!
    My new rebuilt strted growling within a week of install but I will leave it until it explodes to avoid replacemnet again.
    BTW - what are the good replacements? New, rebulit, etc....
    Dave
     
  5. Blue85

    Blue85 Troll Premium Member

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    Why are you replacing the pump?
    It can be hard to get the hose disconnected from the pressure line, so you may find it easier to disconnect the other end of the pressure hose from the steering box and remove the hose with the pump. Then when you have it out on a bench, it will be much easier to get a wrench on it. If the pump you are installing is for an unknown application or an application different than a K-5, you'll probably want to swap in the pressure relief valve from the old pump (unless the reason you are replacing the pump is somehow related to it). You just unscrew the fitting for the pressure hose and the valve and spring are right inside. This is easy to do with a socket once the hose is removed.
    BTW: Autozone will rent you a pulley remover/installer tool for free.

    Also, never pry against the resevoir. It is just a thin stamping and can be punctured easily.

    <font color=green>Why does everyone worry about my gas mileage, but not think twice about an Excursion owner?</font color=green>
     
  6. Boss

    Boss 1/2 ton status Author

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    Ok, here the scoop on the 89' and later model K5's.
    The Alternator sits on top of this bracket that holds both the altenator and PS pump. The PS pump is below just like in the older models.
    http://www.zing.com/picture/p6cea2f8febce9986c57c11bee8a59c00/fe7bb786.jpg.orig.jpg

    Now, remove the bracket (not the aluminum colored one you see, but the one attatched to the back of the pump, and alternator, and also attatches to the manifold. (it's the black one you see in the pic above to the right of the pump behind it). That comes off with the pump.

    Now, once the pump is out, remove the bracket off the reservoir, and then the big stud (that the pressure hose went into. Now, you can remove the old pump...now this part is a pain too. I tried pounding the shaft with a mallet...very hard... but no luck. You don't want to damage the reservoir, b/c it will leak. You may just want to buy another reservoir with the pump.
    But I didn't go that route, I pressed the old pump out very gently. Once it was loose, I pounded the shaft and got it out.
    http://www.zing.com/picture/p0b6971f32bfb2b807fc65a748e7300e3/fe7bb78e.jpg.orig.jpg

    Now, put the bracket back on and put the pump back in in reverse order. There you have it. PIA!! :) Good luck.
    I would go with the best damn PS pump out there...I don't know who makes em, but maybe the dealer. B/c I woudn't want to do this again any time soon :)
    I went with the AGR Super P Pump. http://www.boss.coloradok5.com
     
  7. Boss

    Boss 1/2 ton status Author

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    Forgot to say...definately get the PS pulley puller/installer. either buy it or rent it somewhere for free. It will make your life so much better :)
    I got the pulley puller, but no installer....so I used the long bolt/nut/washer method. I bent 4 bolts and broke one into the shaft!!! I luckily got the broken bolt out, and then rented the pulley remover/installer. Well, it install the pulley with so much ease...way better than the long bolt/nut/washer rigger.
    Boss

    <A target="_blank" HREF=http://www.boss.coloradok5.com>http://www.boss.coloradok5.com</A>
     
  8. 90K5

    90K5 1/2 ton status

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    Yeah, its a PITA on the serpentine belt K5's. The thing is wedged in between the alternator and the frame. I had to take the alt off, and spent about 30 minutes(?) trying to squeeze it between the engine and the frame, dropping it through. Had to come up the same way with the new one. Then I broke the pulley puller from AutoZone, and realized one came with the new pump that was much better. Make sure you get a good one at NAPA, or somewher other than AutoZone becasue they will probably break again. I got mine at NAPA for less than $80 if I remember right. MAy have been more like $60

    90K5

    See my truck at <A target="_blank" HREF=http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502>http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502</A>
     
  9. beefcake83

    beefcake83 1/2 ton status

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    I'm doing the replacement because #1 my power assist went out a few weeks ago (has since come back - ???), #2 I seem to have the normal power steering whine (like when you turn max to one side - not the squeel, but whine) but it whines while driving too.. with the rpm. And #3 because I found that the reservoir is crushed in on the bottom by a previous owner.

    Gary Graham
    '83 GMC Jimmy 350 'Beefcake'
    Eielson AFB, Alaska
    Metallica & Mountain Dew
    http://community.webshots.com/user/beefcake83
     
  10. Panther

    Panther 1/2 ton status

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    Hey Blue, I don't know if you were asking me, but here goes anway.....

    My PS pump is pretty bad off. I've got 120K on the truck and I blew all the PS fluid out of the reservoir (cap popped off) out in the woods one time and didn't realize it til I got home. So the tiny bit of fluid that was left was burnt bad. I refilled it, but the pump should be replaced. I think that is one of the belt driven whines under my hood.

    Plus I am getting my other truck back so my K5 can go on the shelf for a few weeks (it's my daily driver right now). I don't have to worry about having it together in the morning so I can go to work. I bought a new, bigger radiator and when I replace that, I wanna replace everything up there (PS pump/reservoir, alternator, hoses, etc). Just thought it would be a good time to ask what's involved.

    Thanks for the great explanation Boss.

    <font color=blue>Brillance is like 4wd, it allows you to get stuck in a more remote location [​IMG]</font color=blue>
     
  11. beefcake83

    beefcake83 1/2 ton status

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    Yeah, since mine is the early eighties type, it should be alot easier. Still have to climb up on the tube bumper and lean over into the engine bay. If it was easy to do, I'd pull the grill and radiator support, just to be able to work straight ahead. But that would be crazy. I got my pump at Schuck's... through the internet at a site called partsamerica.com. If any of you guys out there have Schuck's, Kragen's, or Big Wheel/Rossi... use this site! Order through them (they even have a 1800 number), and then got to the store and pick up the parts. Big Savings! The pump if bought at the store would have cost $83, but since I ordered it online, it was only $49. Thanks for the help. - Gary

    Gary Graham
    '83 GMC Jimmy 350 'Beefcake'
    Eielson AFB, Alaska
    Metallica & Mountain Dew
    http://community.webshots.com/user/beefcake83
     

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