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Originally Posted by vroom20
I overhauled my cooling system a while back on my 97 XJ. I replaced the radiator, thermostat, and water pump. This repair fixed the leaks and prevented the high temps but I still run warm (220 while driving slow). Does anyone have feedback on the high flow water pumps? Do they really keep you running cool in slow conditions? How about louvers in the hood?
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If you dont currently need a water pump, dont bother getting one, they dont make much, if any, difference. Ive got a FlowKooler water pump, high flow thermostat housing and a three core radiator and my 96 still goes above 220 while sitting still for long periods. If I have the air on it'll stay down around 210 because the aux fan cycles on and off for the A/C.
Louvers will keep it cooler. The heat problem with XJs is the smallish radiator area, smallish underhood compartment and poorly ventilated underhood compartment.