i just finished swaping out my head from a d15b8 to a 16 valve from a d15b2, i didnt change the waterpump or thermostat cus they were working before.

the guage is saying it isnt running hot but something is up when you pop the hood the radiator is super hot and the top hose is very hot but the bottom hose is ice cold so i dono , i am going to change the thermostat but does anyone know anything else?

LMK thanks