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Ok. I think I'm going to buy a new heater core and replace this fall. In the mean time I'm going to bypass the hoses. Sounds like this could help not only with the cooling issue but to help determine if it is in fact the core itself. Since all have the dash ripped out might as well replace the...

The efan comes on at 210 as well as when I turn on the Ac. All of this was replaced with new parts when the new motor was dropped in. Even though am not using the heater during this time of year. Would a plugged heater core cause this? :banghead:

****UPDATE**** Took some advice and dumped the coolant out and did a 50/50 mix. Seemed to run cooler. Az has been 105-110° consistently lately. I'm starting to suspect ac might be my issue. Early mornings to work are nice and cool so ac is not necessary. The jeep runs about 190° at highway...

I really appreciate all the input guys. The Jeep is overheated on me since day one when I purchased it 10 years ago. I thought replacing a whole new motor and a lot of cooling components would be a cure-all. I have both these items you mentioned a hook up my scanner today and bust out the...

Thank you for the advice. I will definitely try that first. I read the exact same thing during a Google search.

I own a 2001 jeep cherokee xj. I recently dropped a reman motor with no miles into it.also replaced the water pump with a hi-flow, thermostat (195°), thermo housing, electric fan, temp sensor, radiator cap and fan clutch. Radiator is approximately 3 years old from cfs 2 row. It's not leaking...