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Thread: need help with water pump.

  1. #1
    cadillacgirl's Avatar
    cadillacgirl is offline Cadillac Owners Member
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    need help with water pump.

    hey guys i have a 98 cadallic deville i think the water pump is going out... its a slow leak... it isnt all rushing out... anyone out there changed one?? where is it?? what tools do i need etc??? if you could help it would be highly appreciated...

    p.s. i ordered my manual but it hasnt came yet...

    ( is ranger here???)


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  3. #2
    Ranger's Avatar
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    Re: need help with water pump.

    The water pump is on the rear of the engine (drivers side) driven off the intake cam by a small narrow belt. Look under the black belt shroud. You need a special pump socket. Here is a picture of one I made. http://www.geocities.com/grandolfo/
    You can get a cheap stamped steel one from Lysle for about $20. I have heard some people say that they slip. A good machined one, like mine will run about $80 from Snap-On. Remember, it is cam locked, not threaded. It takes about 1/8 -1/4 turn clockwise to loosen it and the same counter clockwise to tighten it. Also I believe it only goes in one way, so look at it closely when you remove it. I think the tangs are unevenly spaced or something like that (I haven't had the need to use mine yet. I new making it would insure I'd never need it).

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    cadillacgirl's Avatar
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    Re: need help with water pump.

    thanks ranger..

  5. #4
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    Re: need help with water pump.

    when you sang tangs are you talking about the ridges in the water pump???

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    Re: need help with water pump.

    my husband wants to know if you have a sematic for the tool that you made, with percise measurements and i have a friend who has a machine shop....

  7. #6
    Ranger's Avatar
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    Re: need help with water pump.

    Yes I do. Keep in mind that this is my drawing or notes. A real machinist may balk at this but it worked for me.
    http://www.e-psycho.net/caddy/File0020.jpg

    When I made mine, I took it to a local parts store and "test drove" it to be sure it fit properly before I welded the back plate and modified drive socket. I did 3 "test drives" and modifications but I think the numbers on the drawing are the final ones.

    The water pump on the Northstar is just a cartridge, the impeller basically. Not the type of pump your husband is used to seeing.
    I did some reasearch and I think there is an indexing tab at about 2 O'clock (on the pump, not the socket).

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    Re: need help with water pump.

    just a note to say thanks for all your help... :-)

  9. #8
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    Re: need help with water pump.

    Ranger, how much to test drive your socket on my waterpump??

    Im in SD

    Thanks

  10. #9
    Ranger's Avatar
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    Re: need help with water pump.

    I think AutoZone will let you use them for free, or you can rent one here http://www.caddyinfo.com/toolrental.htm

  11. #10
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    Re: need help with water pump.

    Oh, thats cool....

    So if i order a waterpump, is it an impeller or do i get the whole housing??

    If so, would advance have the upgrade gasket or seal i was reading about??

  12. #11
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    Re: need help with water pump.

    On the Northstar, the water pump is basically just the impeller. The housing stays put. You do not want to change that, believe me. I am not sure if Advance has the upgraded gasket or not. I would think so but I got one from the dealer for about $10.

  13. #12
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    Re: need help with water pump.

    Ok, all i got with the waterpump is a rubber o ring about 2-3" in diameter, they didnt have any other parts to buy. Is this all i need or do i need to go to the dealer. I stay clear of the dealer ever since i priced a leather seat bottom for my eldo for $680, just for the bottom one seat!!!!!!

  14. #13
    Ranger's Avatar
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    Re: need help with water pump.

    Go to the dealer and get the cover gasket. Like I said it is about $10. The "O" ring goes on the pully side. Do a search. Someone asked not long ago for the part number and I posted it. It is shaped somewhat like the silhouette of a snowman.

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    Re: need help with water pump.

    I got a good steel water pump tool from NAPA ,cost 27.00 pump 50.00 gaset about 10.00.To take out turn right ,put in turn left. I had to grind off a little of pump tang edges, to thick to get started to turn, i thought i was going to break the pump houseing.Make sure you put some vasoline to hold silicone gaset on pump cover. It took me about 2 hours including dexcool. Not to bad of a do your self job,save about $200 big ones.

  16. #15
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    Re: need help with water pump.

    Ya, i found out they have the tool at sturdevants, $28 after i ordered one on ebay for $24. So i guess ill wait for it....

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