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mj overheating (wrong section MOD please delete)


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I just picked up my 88 mj from the exhaust shop and got the exhaust all buttoned up, new header cat and muffler, on the way home it was a notch over normal on the high way. when I got in stop and go traffic the temp started climing slowly. I need to get this fixed asap.it almost got into the red. I have a brand new flowkooler water pump on it along with new hoses new overflow bottle, High flow thermostat, thermostat housing, and I has been flushed. The only thing that has not been replaced is the radiator and the fan clutch. When I rev the engine, the fan clutch seems as if it is catching...

 

Could this be a head gasket issue also? seems to be running normal, however I dropped it off at the muffler shop with a open header on it, they welded on the high flow cat and magnaflow muffler and I felt a good loss of power after that was welded on...

 

 

So know I need yalls opinions.

Also I need to find a radiator to buy at a good price that is a upgrade from the stock one row, and how much beet will it cool the engine.

 

And I need the same suggestion for a flan clutch. I would like to upgrade from stock if possible

 

the mj is a 1988 auto 4.0 and has 101,000 miles

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