Need help. I have a 92 honda accord I have change out everything possible, I have a new head, new radiator, new hoses new switches and still my car is overheating. I don't know what else to do. The fans won't turn on until it's too late and the car is overheating and smelling they turn on however when I turn on the air conditioning. I've changed the fan switch but nothing. What else can I do?

Did you fill the radiator properly, with the heat control slide set to max heat? Failure to do this can trap air in the system and lead to a blown head gasket. With the heat control slide set to max heat, fill the radiator until coolant comes out the opened air bleed bolt--this should purge the system of air and allow the cooling fan to operate properly. For more on this, read your Owner's Manual on how to change the coolant.