I have a boosted 97 civic DX HB with a d16 vtec. So, I changed my radiator cap, changed the thermostat, changed out the radiator fan, took off the water pump (it looked fine and spins freely so I put it back on) and changed out the temp sensor for the coolant. The thing keeps over heating . I can drive it for about 35 minutes before it overheats. It keeps boiling out all of the coolant. The head gasket is intact for now...but I need to fix this problem before it gets blown. Any ideas?

 

have you back flushed the radiator, and block. Also the top of the radiator could all be clogged. 13 yr old radiator if the fluid was not changed often, the tops of the radiator gets plugged up. you can have the radiator rodded out. ( shop work )