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  • coolant leak into oil pan?

    I have a 95' 4.0 litre with 180K on it and have never had a problem with it until I have noticed a significant coolant leak. I could not find the leak except it looks like it is going into the oil pan and coming over the sides of the oil pan. I think it is the head gasket or a cracked block but not sure. It still runs good with plenty of power is there any way to test these problems or could it be something else getting coolant into the oil pan. thanks

  • #2
    if it was a head gasket or a cracked block with would run rough and the jeep would be smoking like a siv.

    do you know if your burning any coolant? have you looked in the radiator to see if their is an oily film on top? also if you blew a head gasket your temps would sky rocket. how are they under normal drivin?

    luckly i think its something less major than a head gasket or a cracked block.

    a simple test for head gasket is first off check your plugs, if you burning colant you'll see a gummy reisidue on the plug, second off do a pressure test on all the cylinders.

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    • #3
      pressure test it much easier . also if head gasket is gone check it to make sure its not warpped. sure i know most of these shade tree guys are going to say a "cast iron head never warpes" sure not as easy as aluminum but it can happen so take the exart 5 mins and check it out if unsure take it to a machine shop .

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      • #4
        Shade tree? Wow.

        Go to AZ and get a renta tetser from them, you can do this right in their parking lot. Pressurize the system and crawl underneath and listen for the hissing. If you can hear it but cant tell from where, start pulling plugs. Listen with a stethoscope or piece of fuel line in each cyclinder till you can hear wich one is the loudest. If they all sound the same, its more than likely not a cylinder head (warped or gasket) problem.

        The next step after this would be to pull the pan, and refill the radiator and pressurize again. You should really be able to see where it's coming from then.

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        • #5
          I had a coolant leak that seemed similar, it was running down the block then dripping off the rim of the oil pan because it was the lowest point it came to, your situation sounds similar to mine, Mine was the water pump and or waterpump gasket. I thought mine was a headgasket at first, but then followed the trail.. to the water pump

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          • #6
            Originally posted by dkcamper
            I have a 95' 4.0 litre with 180K on it and have never had a problem with it until I have noticed a significant coolant leak. I could not find the leak except it looks like it is going into the oil pan and coming over the sides of the oil pan. I think it is the head gasket or a cracked block but not sure. It still runs good with plenty of power is there any way to test these problems or could it be something else getting coolant into the oil pan. thanks
            Have you checked the oil it's self to see if you have water in it? if you do it should be milky color like coffe with cream shade tree mech. here... or rad. to see if you have oil in there or water comming out your tail pipe? could be as small as a heater hose pissing out or a water pump leaking. headed to the lowest point of the motor and running off. with out a tree to lean on and look i cant tell for sure but if you do not have a mixture of water and oil some place or water comming out your tail pipe i would say it's not a head problem...

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