water pump leak after replacing pump/seal
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Northstar Engines and System Technical Discussion Discussion, water pump leak after replacing pump/seal in Cadillac Engine Technical Discussion; i'm working on a friend's 97 deville 4.6 ns trying to fix a leaking water pump. i replaced the pump, ...
  1. #1
    stockgp is offline Cadillac Owners Member
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    water pump leak after replacing pump/seal

    i'm working on a friend's 97 deville 4.6 ns trying to fix a leaking water pump. i replaced the pump, pump seal, thermostat and cover gasket.

    there is still water coming out of the pump. i can crawl underneath and watch the water coming from behind the pump pulley. and it's not a slow leak, either.

    any ideas what could be causing it?

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  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: water pump leak after replacing pump/seal

    The O ring seal was not seated properly.

  4. #3
    stockgp is offline Cadillac Owners Member
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    Re: water pump leak after replacing pump/seal

    i took it back out, cleaned the groove, used a dab of rtv to hold the ring in place, and it's still leaking. i'm thinking maybe it's the water pump shaft seal

  5. #4
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: water pump leak after replacing pump/seal

    Shaft seals don't leak that bad even when they leak after 100,000 miles of wear. If that is the case, that's one shitty pump. What brand is it? Where did you get it?

  6. #5
    stockgp is offline Cadillac Owners Member
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    Re: water pump leak after replacing pump/seal

    it's an auto zone duralast part. i don't know what else it could be if it's not the water pump itself. i've taken apart and reassembled this four times now. still can't get the leak to stop

  7. #6
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: water pump leak after replacing pump/seal

    Quote Originally Posted by stockgp View Post
    it's an auto zone duralast part.
    All bets are off!

  8. #7
    stockgp is offline Cadillac Owners Member
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    Re: water pump leak after replacing pump/seal

    lol. i don't know what to do. i'm just spinning my wheels on this thing, and not making a dollar off of it.

  9. #8
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: water pump leak after replacing pump/seal

    Considering you have gone back and double checked your work and that it is an AutoZone Don'tlast part, I'd replace it with a quality pump. ACDELCO Part # 252707 $35 at Rockauto.

  10. #9
    stockgp is offline Cadillac Owners Member
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    Re: water pump leak after replacing pump/seal

    i suggested the same thing. problem was the lady needs her car, and she didn't want to wait for one to ship in. so she bought one from auto zone. i guess i'll just have ot tell her she'll have to wait

    thanks for the input

  11. #10
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: water pump leak after replacing pump/seal

    Well, she got what she paid for.

    Rockauto ships fast OR if she wants it NOW, go to a local dealer.

  12. #11
    CadillacLuke24's Avatar
    CadillacLuke24 is offline Cadillac Owners Connoisseur
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    Re: water pump leak after replacing pump/seal

    Quote Originally Posted by Ranger View Post
    All bets are off!
    Built to fail, Don'tlast.

    Right Ranger?

    Go with a Delco part.

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