high speed over heating

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06-29-2009, 01:34 PM

Sapoman85

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Year: 1991

Model: Cherokee

Engine: 4.0 in line 6

high speed over heating

I have a 91 jeep cherokee 4x4 sport. I have changed the radiator, thermostat and water pump. I also chang

ed th

e electrical fan. The car runs fine on fresh days and hot days. When I drive on the highway for over ten minutes the temperature needle starts to creep up to the boiling point.

Can anybody help me out.

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06-29-2009, 02:55 PM

jd4x426

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Year: 1996

Model: Cherokee

Engine: 4.0

how high does it actually go number wise does it go over 220 you may also want to check into your mechanical fans clutch they are known to have issues

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06-29-2009, 03:08 PM

4.3L XJ

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Year: 1986

Model: Cherokee

Engine: 4.3L with headers and full 3" exhaust system

Do you have a winch?

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06-29-2009, 03:50 PM

Sapoman85

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Year: 1991

Model: Cherokee

Engine: 4.0 in line 6

It goes up to the 3/4 mark. I have the original temp gauge. I usually pull over when it gets that high. It only happens on the high way since i put in the new parts. on the streets it works fine. The other day it wouldn't start. And when it finally did it had trouble staying on..And the past two days it has been runing like a champ. except for the overheating.

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