The 1966 Mustang's cooling system includes a radiator, a thermostat, a water pump and two radiator hoses. As the engine rotates, the water pump draws coolant into the engine from the radiator via the bottom radiator hose. The coolant circulates throughout the engine and then returns to the radiator via the top radiator hose. The coolant then trickles down a series of tubes where the its temperature is reduced. If these tubes become clogged, the radiator will not cool the fluid enough and the engine will overheat. Fortunately, replacement radiators are available and installation is straightforward.
Tools Used: Wrench, Screwdriver, Coolant, Water
Change the Radiator
Wait for the engine to cool, then remove the radiator's filler cap by turning the cap counterclockwise.
Open the drain plug at the base of the radiator with a wrench, or disconnect the bottom radiator hose by slackening its clip with a screwdriver, to drain the radiator.
Slacken the clip on the upper hose with a screwdriver and pull it off the radiator. Remove the bottom hose, if it was not removed to drain the radiator.
Rotate the tips of the two oil cooler lines on the base of the radiator in a counterclockwise direction with a wrench until they disconnect from the radiator.
Remove the four bolts that secure the sides of the radiator to the front panel with a wrench, then lift the radiator upwards and away from the engine bay.
Lower the replacement radiator into position within the engine bay. Install the four bolts that secure the sides of the radiator to the front panel with a wrench.
Position the tips of the oil cooler lines onto their respective fittings on the base of the radiator, then tighten the lines with a wrench.
Press the two radiator hoses into their fittings, then tighten the two hose clips with a screwdriver. Fill the radiator with an equal mixture of water and coolant and install the radiator cap.
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