Question about 1988 Jeep Comanche

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Over heating 1988 jeep comanche

The tank pressure's up and blows over. The hoses in to the tank were leaking and the tank had a crack in it so i changed them.It seems like there is to much pressure building in the tank. when the motor is ideaing it will not overheat but if you run it down the road then let it idea for 10 min it will over heat. Can anyone help. Trying to get away from pulling the head off and checking for a cracked block or head as the compression is good.

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You'll need to find out if the system is overheating and that is causing the the antifreeze to blow-over. If it was the head-gasket it usually would blow-over as soon as you started it up. But you say it happens after ten minutes of running. Sounds like the antifreeze isnt circulating. You'll need to check the cooling components one by one. Hoses, thermostat, radiator, water-pump.

Posted on May 12, 2009

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Change the radiator for 1992 comanche radiator whit radiator cup pressure .
cut the hoses.take the water tank and put in the trash can.

believe me no more problem.
i live on sonora mexico were is hot like a mother f..r i replace al this and my truck runs like a mother fucket

Posted on Jun 10, 2011

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I had the same problem, radiator was 80% clogged, I had it remanufactered and my truck runs like a dream now.

Posted on Aug 13, 2009

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