1998 Deville coolant leak
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 1998 Deville coolant leak in Past Cadillac Vehicle Discussion; Hello everyone I'm new to this forum and have a 1998 Deville with a coolant leak. I have noticed a ...
  1. #1
    autoed is offline Cadillac Owners Member
    Automobile(s): 1998 deville
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    1998 Deville coolant leak

    Hello everyone I'm new to this forum and have a 1998 Deville with a coolant leak. I have noticed a leak running behind the back of the water pump housing and dripping on the trans. My problem is I cannot see exactly where it is coming from. I see the back of the water pump housing(at the belt) and it is leaking slightly at the water pump, not as much as I see dripping behind the housing. My question is is it possible for the crossover to leak down the back of w/p housing? I don't want to put a w/p in if I have to change crossover gaskets. In the morning I will remove belt and try to get a better look at the pump, from what I've read I certainly hope it's the pump and not the crossover.
    Thanks

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  3. #2
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
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    Re: 1998 Deville coolant leak


    Pre-2000 engines where not known for crossover gasket problems. From your description it sounds more like the WP inner seal or the shaft seal.

  4. #3
    autoed is offline Cadillac Owners Member
    Automobile(s): 1998 deville
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    Re: 1998 Deville coolant leak

    Thank you, I suppose the way to go would be to get a rag under w/p pulley and see if that changes leakage

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    Thank You Ranger

  5. #4
    flyingcadillac is offline Cadillac Owners Member
    Automobile(s): 1988 Allante, 1998 Deville
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    Re: 1998 Deville coolant leak

    There is a freeze plug in the head exactly where you described. I bought 98 deville that had a major leak there. I couldn't see where it was leaking no matter how hard I tried from the top, however if you get under the car and look up you can see the freeze plug area, as well as get a better look at the water pump gasket. I'd suggest taking a look at it that way.

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