Running Hot on 1999 Land Rover Discovery

My car run hot and I do not know why. I changed the thermastat. Do you think it may be the water pump or radiator. My car runs fine besides it runs hot.

by in Houston, TX on April 07, 2011
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1 answer
ANSWER by , April 07, 2011
If the system is full of antifreeze, drive the vehicle for about 10-15 minutes on the highway. Then reinspect. CAREFULLY feel the upper and lower radiator hoses, they should feel abouth the same temperature. If not suspect a flow problem (water pump, stuck thermostat, headgasket causing air pockets). Also feel the radiator fins, it should be aroundf the same temperature all around. If it only runs hotter at highway speeds, suspect a clogged radiator.