I have an 02 third gen. with a cooling issue. I replaced the radiator for the third time on this truck and since this last time the temp starts going up after i drive it for a bit when at an idle. I since then have replaced the water pump, thermostat, cap, fan clutch, and now the radiator again! Still same issue. There is alot of pressure in the system. It does leak past the cap out the lil hose so I figured I would run for a bit with the cap loose to let it bleed itself. Well when i got home the darn thing pushed a gallon of the coolant out! I dont know what else to do! I'm thinking of a coolant test to see if i have a bad head gasket but its not blowing water just oil.(185,000 beaten miles)Can anyone help???