two easy answers are: 1. the coolant isn't at its' proper mixture (ie. too much water, or not enough coolant) 2. your radiator has gotten too plugged up to allow the coolant to pass slowly enough through to cool the engine, the coolant is being force through 10 ports fast instead of 50 ports slowly.
Heater Core
Can you put a 1994 thunderbird motor in a 1996 thunderbird?
There will be air trapped in the system. The car may overheat and boil the coolant, causing damage.
1996 ford thunderbird pcm power relay location?
Engine coolant temperature is cooled by the radiator, moved by a water pump and controlled by a thermostat. If there are troubles with any of those components the coolant will boil Also if the head gasket goes bad gasses from combustion inside the engine will get into the coolant and cause it to boil.
5W-30 is the preferred oil , according to the 1996 Ford Thunderbird Owner Guide
It is located on the coolant reservoir. This part cost $70.00
According to the 1996 Ford Thunderbird Owner Guide : ( 18.0 U.S. gallons / 68.1 liters )
on the thermostat housing
On a 1996 Ford Thunderbird : In the Power Distribution Box ( which is " live " ) located in the engine compartment next to the engine coolant reservoir ( fuse # 13 is a 20 amp fuse for the fuel pump )
no
No