I just got a 1989 jeep comanche 4.0l 5 speed. The engine has 279,000 miles it runs good but overheats. I raced the thermostat water pump but no luck with getting it to stop. Any clue why.

Asked by migration_Patrickjr2... Aug 25, 2014 at 08:01 PM about the 1989 Jeep Comanche Eliminator

Question type: Maintenance & Repair

I ordered a new radiator also but if it
dosent work what year engines are
compatabe with it and where can I
buy a complete new engine?

2 Answers
46,155

Michael answered 9 years ago

I believe Jeep used the 4.0 inline 6 motors in the Cherokee up till 2001 and in the wrangler into the mid 2000's.

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pef459 answered 9 years ago

My comanche overheated when I incorrectly connected the heater hoses to heater core, swapped the two around all was good after that. If I remember right top heater hose off the thermostat housing ends up on the top heater core connection.

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