Engine overheating is the most common engine trouble attributed to the radiator. The 1966 Ford Mustang was equipped with a single front-mounted radiator. Inside the radiator are a number of vertical metal tubes through which the antifreeze flows. Rust and scaling that builds up inside the radiator can clog many of these tubes over time and lead to overheating. If the damage is not extensive, the radiator can often be repaired. In extreme cases, the radiator must instead be replaced.
Tools Used: Wrench, Screwdriver, Antifreeze
Replace the Radiator
Drain the radiator by removing the bolt on the engine side of the base of the radiator with a wrench.
Slacken the hose clamps that secure the two radiator hoses to the radiator with a screwdriver.
Pull the hoses off of the radiator.
Disconnect the two metal cooler lines from the engine side of the base of the radiator with a wrench. This is only necessary if the Mustang has an automatic transmission.
Remove the four bolts that secure the radiator to the radiator support with a wrench. Two bolts are located on each side of the radiator.
Lift the radiator out of the engine compartment.
Lower the new radiator into the engine compartment. Take care not to damage the engine side of the radiator on the fan blades.
Install each of the four bolts that secure the radiator to the radiator support with a wrench.
Position the two metal oil cooler lines onto their fittings on the bottom of the radiator, if the Mustang has an automatic. Tighten the lines onto the fittings with a wrench.
Press the two radiator hoses onto their fittings on the radiator.
Fill the radiator with antifreeze through the radiator cap opening.
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