if you have cooiling problems you should upgrade get the koya radiator it cools 30% more than stock-get all fluids changed out-maybe a transmission and oil cooler system-and if you wanna go extreme maybe get a front mount intercooler even though you have no turbo it will still cool the engine-and a cai if you dont have one already that should keep your engine real cool and maybe give some extra ponies
doesn't make a Celica radiator.
2. The only fluid that needs to be changed is the coolant.
3. His transmission fluid and oil aren't getting too hot, and never will without serious abuse.
4. Intercooler on an NA car. Hmmmmm...
5. A CAI
has no engine cooling properties.