ALnut said:but the problem is.. the bottom hose is NOT even warm or anything.. should i just leave it running for a longer time??.. like 30minuts??
whats happening is the coolant in the engine heats up. then the thermostat opens up allowing the hot coolant out of the engine to the radiator (top hose). hence the top hose is hot while the bottom one is cool. as the cooler coolant enters the engine the thermostat closes until it exceeds the thermostat rating and then it opens up again and lets that coolant out. this happens several times until all of the coolant is the same temp. when all of the coolant is the same temp (195 degrees i think).. then the coolant temp. is regulated by the thermostat and the fan