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Thread: Water Pump Drive Pulley Removal

  1. #1
    Zorb750 is offline Cadillac Owners Connoisseur
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    Question Water Pump Drive Pulley Removal

    Ok... I'm working on a FWD Northstar engine, space is unlimited as it is on an engine stand. How do I removal the water pump pulley from the intake camshaft on the even (front) side? I've removed these things before but this one will NOT come off. I've hit it with about 8 kinds of penetrating oil, I don't want to warp the camshaft so I'm not going to heat it excessively.

    Last time, all I did was put a small puller onto the ring at the outer side of the hub of the pulley (hub is metal, pulley is plastic), and off it came.

    Any better suggestions?


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    Raze's Avatar
    Raze is offline Cadillac Owners Enthusiast
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    Re: Water Pump Drive Pulley Removal

    naa, yeah like you said, clamp on the inner metal portion, just borrow a pulley removal kit from Autozone, Advance, NAPA, otherwise get a larger pulley remover with more arms (the 3-4 variety) and just clamp on the plastic, it'll come off and even if you break it they're not expensive to replace...

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    eldorado1 is offline Cadillac Owners Connoisseur
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    Re: Water Pump Drive Pulley Removal

    Rent a power steering pulley puller from Autozone (or Advance). It will slip on the metal collar and won't break anything.

    Once they snap they'll slip right off (relatively speaking)

  5. #4
    Zorb750 is offline Cadillac Owners Connoisseur
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    Re: Water Pump Drive Pulley Removal

    Power steering pulley puller. Ok. Will try that. I assume it has a fixed jaw size?

  6. #5
    eldorado1 is offline Cadillac Owners Connoisseur
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    Re: Water Pump Drive Pulley Removal

    yes, it just slips on the collar. It will look something like this:

    http://www.stu-offroad.com/steering/pspump/psp-2.jpg

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    Re: Water Pump Drive Pulley Removal

    It takes the same puller as the p/s pump pully.

  8. #7
    z06bigbird is offline Cadillac Owners Connoisseur
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    Re: Water Pump Drive Pulley Removal

    Good luck.

    Ed

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    Re: Water Pump Drive Pulley Removal

    Quote Originally Posted by Raze View Post
    naa, yeah like you said, clamp on the inner metal portion, just borrow a pulley removal kit from Autozone, Advance, NAPA, otherwise get a larger pulley remover with more arms (the 3-4 variety) and just clamp on the plastic, it'll come off and even if you break it they're not expensive to replace...
    not expensive to replace? try $65 to replace the plastic pulley. I broke mine just now... the junk yard wants $125!!!! for one.

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    David Olinger is offline Cadillac Owners Member
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    Re: Water Pump Drive Pulley Removal

    How do you get the pully back on once u get it removed? I am changing the belt, pump, and pully right now. Got everything disassembled but the pully is 40 bucks and I don't want to have to buy a new one by breaking it by beating it back on...any suggestions?

  11. #10
    tateos's Avatar
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    Re: Water Pump Drive Pulley Removal


  12. #11
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    Submariner409 is offline If it won't run, chrome it
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    Re: Water Pump Drive Pulley Removal

    Quote Originally Posted by David Olinger View Post
    How do you get the pully back on once u get it removed? I am changing the belt, pump, and pully right now. Got everything disassembled but the pully is 40 bucks and I don't want to have to buy a new one by breaking it by beating it back on...any suggestions?
    Don't even come close to trying to force the pulley onto that intake cam snout. You'll be buying a whole new left head valvetrain if you do.

    Use either the GM pulley removal/install tools ($300), the posted Harbor Freight (or NAPA store) power steering pulley kit, or use a proper size/length metric bolt, greased washers, and nut to press the pulley back with the hub flush with the end of the cam snout. I assume the Torx-headed plastic cam protector button is removed. Look at the diagram for the idea of how to press the pulley back onto the cam.

  13. #12
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    Re: Water Pump Drive Pulley Removal



    I'll echo that warning. Beat it on and a replacement pulley will be the least of your worries.

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    Re: Water Pump Drive Pulley Removal

    FYI folks:
    #3535846 - $53.36 (GM List price) -- $39 (forum member discount price)

  15. #14
    tjohnson20 is offline Cadillac Owners Member
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    Re: Water Pump Drive Pulley Removal

    Does anybody know the size of the bolt needed to press the Cam Pulley back on the Cam shaft? I plan on using a bolt and washers as noted.

  16. #15
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    Re: Water Pump Drive Pulley Removal

    The bolt measures to be 7.94mm - probably an 8mm bolt, fine or medium pitch thread.

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