I have a 1992 Coupe 5.0 and it seems to be running hotter than I think it should. I have a new 3 row radiator, 180 degree t-stat, new water pump, new clutch and fan assembly, and a new heater core installed. I don't have a manual temp gauge, only the factory one in the cluster. It runs all over the "O" in "NORMAL" and I thought it should run somewhere around the "M". Am I wrong or does anyone have any suggestions.

 

A180 degree thermostat can mess the computer up. Newer electronic cars are Ok with a 192 on the low side. If it reads normal I wouldn't worry. You could try a stick shift 4 row radiator for extra cooling (and seperate the tranny. coolerfor automatic transmission). Basically though it depends if you have money to burn or not. Be careful not to install the thermostat backwards. Timing also affects temperature if it is incorrect. Another problem can be non-stock spark plugs firing too hot or stock plugs incorrectly gapped.