Thread: Water pump install issues

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  1. #1 Water pump install issues 
    Senior Member Grand Slam West Planner Ted_Z's Avatar
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    So I swapped in a new water pump over the long weekend. Now I have a minor leak coming from the tube that goes into the water pump housing on the driver's side. I think it is called the coolant return tube or something like that.

    Anyway I had a hell of a time getting the old tube into the new water pump with a new o-ring (the o ring came with the water pump). I must have pinched it or something because now I have a leak there.

    Anyone have any tips on this? Where can I find just the o-ring, or what size is it so I can hit up a hardware store?

    2 steps forward, 1 step back...
    -Ted Z
    '97 Grand Cherokee Laredo w/ stuff
    '02 Grand Cherokee Limited w/ less stuff
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  2. #2 Re: Water pump install issues 
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    BigDaveZJ's Avatar
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    If you find an o-ring for it, let me know. The last new pump I got for a ZJ included the o ring for that tube, the one I got last month did not so I just goobered RTV all over it. It dripped a few drops at first, but apparently the heat cycling of running the motor made it expand a bit and it doesn't leak anymore.

    The other thing I'll do with O-rings is put a bit of motor oil on them before inserting them. Dry O-rings are a major pain in a fitting like that.
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  3. #3 Re: Water pump install issues 
    Senior Member Grand Slam West Planner
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    I've always done rtv because no o-rings have worked for me.


    Because Jeep.
    "ZJ's were designed with the intention to take 1 really good hit, and fold up. As long as the occupants walked away, it was a success. In the wheeling world, we expect our vehicles to take multiple really good hits, drive out of it, and run the obstacle again!"
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