Home » Cooling Perfomance » Where Is The Thermostat Housing On A 2002 Buick Century Custom Where Is The Thermostat Housing On A 2002 Buick Century Custom MY 2002 Buick Century Custom was overheating after about 5 minutes the car is on, I’m sure it’s the thermostat but I am where it is. Tags:2002, Buick, century, Custom, Housing, Thermostat Related Questions Thermostat in my car that has a 3.1 V6 Sticks- Cost $200 -I thought Thermostats were easy to replace This is a 97 Chev Malibu. I thought most thermostats were by the radiator – why should it take 2 hours worth of labor plus the cost of the K&N Fuel Injection Performance Kit Does the K&N Fuel Injection Performance Kit really gain you 26 HP? It says up to 26 but I am figuring it means on a regular car about 5-10. One Respons for The Question onebadpooh2001 If you have the 3100 engine,the thermostat is below the throttle body where the upper radiator hose is going. If you have the 3800 engine,it is toward the front of the car from the throttle body where the upper radiator hose is. One note is,no engine overheats in 5 minutes.The coolant will not get hot enough in 5 minutes to be able to open the thermostat. I would bet you have a head gasket problem. Most likely it would be the rear head gasket pumping cylinder pressure and heat into the coolant. Incoming search terms: 2002 Buick Century Thermostat Replacement,2002 Buick Century Thermostat Housing,Hiw Much Can A 2002 Buick Century Tow?,Why I Have No Thermostate In 3100 Sfi Vs ?