Has anyone ever experienced excess pressure in their cooling system? (enough to blow an upper radiator hose) I'm at my wits end with this truck and it's driving me crazy. - I bought this truck with a blown head gasket and a cracked head. Bought a new head and had it tested by the machine shop, decked, plugged and complete valve job completed. Bolted it down with OEM head gasket in five upsteps following the sequence until I hit 90lbs consistent. Replaced radiator with a brand new one (all metal), new thermostat (Stant) and new radiator cap OEM. Running green coolant 1/2 and 1/2 mixture with distilled water. Elevated front of truck and ran with heater on until all bubbles were gone. Truck runs normal op. Temps for 15-20 minutes and than starts heating up rapidly when stopped at lights. Cools off once i start moving again. Haven't come close to overheating into the red, but haven't really driven it long enough to heat it up either. New waterpump (Bosch). All new hoses. New fuel pump/screen/ filter. Injectors serviced/balanced, passed emissions flying colors... Runs well... Just has excess pressure in the damn cooling system! Is the only thing that causes it to build pressure the water pump? What would you do in this situation? Is it possible the compression gases are leaking into my coolant passages? I have put on 105miles since it was redone ( very short trips) and the oil and coolant both look clean. (no milky color at all. The overflow bottle doesnt seem to move at all... It always reads full. Considering doing a block test tonight for hydrocarbons in the coolant, but don't know what I could do if they were in there? (torque down the head another ten pounds and pray?) What should I do... I have just over $3000.00 dollars wrapped up into something so close to working correctly, but so far from the mark.... Sigh... Any words of advice much appreciated. Thank you. Brandon 602-448-5852
