Car is running hot. on 1999 Nissan Pathfinder

I have a 1999 Nissan Pathfinder. I'm having a problem with it running hot. If I drive somewhere within 15 miles, it runs at normal temp, but it seems like whenever I drive further it runs hot. My brother says there's no pressure in the cooling system. I bought a new radiator cap, and we vacuumed the radiator out thinking there may be an air pocket. Neither have worked. I bought a thermostat for the car, but I don't want to put it on if it's not the problem. I've also noticed a crack in one of the air intake tubes. Was wondering if that could be the problem. Any help would be appreciated.

by in Louisville, KY on May 12, 2014
1 answer
ANSWER by , May 12, 2014
it could be a number of things but I would pressure test the cooling system for leaks ,then replace the t -stat and go from there. !!!