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98 5.0 mountaineer coolent leak

Discussion in 'Stock 1995 - 2001 Explorers' started by TKZ, February 9, 2011.

^^Searches ExplorerForum.com^^





  1. TKZ

    TKZ Elite Explorer

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    OK, I have a 98 5.0 with 141,000 miles and it is leaking coolant,from the front of the engine running down to the block/pan on the drivers side.I have read the posts about the timing cover gaskets leaking, do all the V8s end up leaking? I was thinking (hoping!)it mite be the water pump because there is a squeak noise that sounded like the idler pulley bearings,but replaced them-still squeaks. Does anyone have a good test to eliminate the water pump?
    does not lose a lot of coolant from the reservoir but sure does make a mess on the bottom of the truck and keep dripping after it is shut off.
    Truck does not over heat and there is no coolant in the oil.
    Thanks

    This site is great !!
     
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  3. Turdle

    Turdle Moderator Staff Member Moderator Elite Explorer

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    There are a few things to check.
    Unfortunately, in order to really see what is happening you need to remove the serpentine belt and fan. Sorry.

    There might be a leak in the oil cooler, the lower rad hose connection to it-or the short hose between the cooler and water pump.

    The water pump, or a small bypass hose could also leak.

    However, you are in luck, as you need to remove the serpentine anyway to find your squeek.

    http://www.explorerforum.com/forums/showthread.php?t=161590&highlight=chirp


    if you d see a timing cover leak, see if the corresponding bolt is snug. You might get lucky.

    It is ok during cold weather to run the truck without the fan to search for the leak, and, higher coolant temps will usually make the leak worse, making it easier to find. Just keep an eye on your temp gauge if you run the engine over 5 minutes.
     
  4. celly

    celly disturber of the peace

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    I've got a 5.0 with 80,000 miles with no coolant leaks. I've heard lots of quirks about the V8, but coolant leaks aren't one of them. Exhaust leaks are another story. :D

    Good luck.
     
  5. 2000LXS

    2000LXS Active Member

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    could be a hose clamp rusted and broke off.
     
  6. OneLever

    OneLever Active Member

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    The thermostat housing gasket in that area occasionally goes bad as well.

    Picture of the area I'm talking about:
    [​IMG]
     
  7. TKZ

    TKZ Elite Explorer

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    thank you all very much , I will remove the fan and belt tonight
    I will let you know what i find
    thanks again!
     
  8. TKZ

    TKZ Elite Explorer

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    yea, I have a Exhaust leak as well but it seals up once is hot.
     
  9. Turdle

    Turdle Moderator Staff Member Moderator Elite Explorer

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    A cracked passenger side exhaust manifold is about the most common issue with the 98 5.0
     

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