Well guys, i had a small radiator leak by the water neck and hose and so i replaced the thermo(w/ a 180* from autozone notthe cheap one the oem approved one) put on a new gasket w/ sealent and filled up the coolant with some 50/50mix. Well my car used to run at a constant 220 degrees and never really went much over. The guy i bought the car off of took out the computer and carbed it. It also has to switches on the inside forthe fans but dont seem to work. Well sicne replaing the thermo the car gets almost into the 250-260 zone and then the fan will kick on. and it will run around 225. I dont want this it never did this before i replaced the thermo. The thermo is in right with the point up. What could the problem be? ANd y is the fan kicking on so late ? thanks

 

Leak at the radiator or the thermostat housing?
make sure you got all the air pockets out of the cooling system and you'd better fix your fans so they work properly.
They need a thermostatic switch and a relay to supply battery power to the fans.
Once you get the adjustable thermostatic fan switch, you turn the dial until the fans come on when you want.

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Sounds like your temp gauge sending unit needs replaced.

The factory fan switch is designed to turn the fan on at around 230°. With a 180° thermostat, the head temp will be around 200°. Sounds to me like your temp gauge is reading around 30° high.