Northstar Water Pump Replacment Steps
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  1. #1
    ipncjh1's Avatar
    ipncjh1 is offline Cadillac Owners Member
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    Northstar Water Pump Replacment Steps

    All,
    While I was replacing the water pump on my 2000 DTS I wrote down each of the steps. Hope this helps others considering the job. It is really very easy.

    If anyone wants to add anything please do so.
    Brian

    2000 Deville DTS Water Pump Replacement


    Tools, Parts and Supplies Required

    Tools:
    Northstar water pump Remover Tool
    10mm 3/8” drive deep socket
    10mm 3/8” drive socket
    3/8” drive 1” extension
    3/8” drive 3” extension
    3/8” drive ratchet
    ½” drive breaker bar
    Phillips head screwdriver
    Large flathead screwdriver
    Channel Lock Pliers

    Parts:
    New Water Pump with o-ring
    Housing Cover Gasket (dealer item)

    Supplies:
    Dex-Cool Antifreeze
    Cooling System Pellets (dealer item)

    Overview
    This is one of the easiest water pump replacements I have ever done. Below are the steps in the order I performed them.

    Remove radiator plastic cover across top front of engine bay
    Remove shield on water pump belt drive. Two 10mm nuts and one 10mm bolt.
    Remove 10mm nut holding oil dipstick to water pump housing
    Remove air filter and completely remove the air box. Set computer to the side safely. (you will be glad you did this step)
    Use large screwdriver to move belt tensioner to release tension and remove belt from water pump pulley
    Remove clamp from upper radiator hose and remove hose
    Remove clamp from thermostat housing bypass hose (do not remove hose yet)
    Loosen 4 10mm bolts with deep socket on water pump housing and let coolant drain
    After coolant drains, remove 4 10mm bolts from water pump housing and remove housing.
    Place special Water Pump removal tool on water pump cartridge and using ½” drive breaker bar turn clockwise until pump slips off housing.
    Remove pump and remove o-ring inside the water pump housing
    Clean area good with cloth rag or paper towel
    Put clear grease on new o-ring and install in water pump housing
    Install new water pump and using special tool and ½” breaker bar turn counter clockwise until new pump snaps into place
    Remove old seal from water pump housing cover
    Put clear grease on new seal and install in water pump housing cover making sure to insert the fitting inside the bypass hose by the thermostat
    Install 4 10mm bolts in water pump housing cover and tighten
    Re-install clamp on bypass hose and tighten.
    Crush up cooling system pellets and pour inside upper radiator hose
    Install upper radiator hose and clamp
    Use large screwdriver to move belt tensioner to release tension and install belt on water pump pulley
    Install water pump belt shield
    Re-attach oil dipstick to water pump housing
    Re-install airbox and computer
    Mix coolant 50/50% with water
    Start engine and fill with coolant watching closely so you do not over fill

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  3. #2
    urbanski is offline Cadillac Owners 10000+ Posts
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    Re: Northstar Water Pump Replacment Steps

    thanks

  4. #3
    chazglenn3's Avatar
    chazglenn3 is offline Cadillac Owners Connoisseur
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    Re: Northstar Water Pump Replacment Steps

    There is some clown selling these instructions on eBay...thanks for posting here!

    http://cgi.ebay.com/ebaymotors/How-t...spagenameZWDVW

  5. #4
    N-star is offline BAD EMAIL ADDRESS
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    Re: Northstar Water Pump Replacment Steps

    I don't think is really all that hard, the only thing I found difficult was to undo the water pump (it required a big round tool to twist the actual pump)

  6. #5
    dp102288's Avatar
    dp102288 is offline Cadillac Owners Connoisseur
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    Re: Northstar Water Pump Replacment Steps

    That auction is horrible! I wouldn't be surprised if the link is to this board of Caddyinfo!

  7. #6
    dennii825's Avatar
    dennii825 is offline Cadillac Owners Member
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    Re: Northstar Water Pump Replacment Steps

    Just replaced mine 1 week ago.It was quite easy,the pump turned out with no problems,with just a breaker bar and the special tool.Always remember to remove the pump,turn the pump clockwise about 1/4 inch turn.It took me about 2 hours to do,if you take your time it should be no problem.Thanks for the step by step it was very helpful.I would suggest doing it yourself if possible rather than taking it to the dealer (575$).Thats just crazy !!!!

  8. #7
    mr_mr11 is offline Cadillac Owners Member
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    Re: Northstar Water Pump Replacment Steps

    I just replaced my water pump on my 94 4.6 Liter. The "special tool" referred to in other posts is a large socket that goes on a 1/2" breaker bar and can be purchased from a local store like NAPA - I wouldn't try turning the pump off/on w/o the socket! Good luck.

  9. #8
    iametarq's Avatar
    iametarq is offline Cadillac Owners Connoisseur
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    Re: Northstar Water Pump Replacment Steps

    hmm, i just put my pump in today but didn't use any clear grease. i should be ok i would think...certainly wasn't any left on the old one. I'll add some pictures to this thread when i am completely done...

    also just realized i forgot to get my pellets from the dealer today!!

  10. #9
    iametarq's Avatar
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    Re: Northstar Water Pump Replacment Steps

    Here are some of the pictures I have:

    Drain Plug on bottom of Radiator


    Water Pump Housing & Cover


    Tools with old and new water pumps

  11. #10
    z06bigbird is offline Cadillac Owners Connoisseur
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    Re: Northstar Water Pump Replacment Steps

    Good way to save a few dollars.

  12. #11
    Drparj is offline Cadillac Owners Member
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    Re: Northstar Water Pump Replacment Steps

    where do you get the tool from?

  13. #12
    99esteees's Avatar
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    Re: Northstar Water Pump Replacment Steps

    Did you guys remove the oil dipstick piece that is in the way? I can't figure out how it comes out and it is giving me the hardest time trying to get to the bolts.

  14. #13
    Drparj is offline Cadillac Owners Member
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    Re: Northstar Water Pump Replacment Steps

    No need to remove the oil dipstick, but should take out the air filter housing and I laid the computer on top of the motor so it was out of the way. Makes it a whole lot easier to get to everything.

  15. #14
    99esteees's Avatar
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    Re: Northstar Water Pump Replacment Steps

    Mmmk I feel like I'm gonna break the water pump trying to tight it back on.

  16. #15
    Drparj is offline Cadillac Owners Member
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    Re: Northstar Water Pump Replacment Steps

    you should not need to take the dipstick out just the air filter assembly and as long as you use a reliable tourque wrench you should be good, make sure everything is seated correctly and not binding or caught on anything, should all slide together nicely

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