REMOVAL & INSTALLATION
- Drain the radiator and remove the hoses.
- Disconnect and plug the automatic transmission cooler lines.
- On six cylinder engines, remove the finger guard.
- Remove the upper retainers with the fan shroud attached (V8 models) and rest the fan shroud over the engine.
- Lift the radiator out of the lower retainers.
- Installation is the reverse of removal. Fill the cooling system, check the automatic transmission fluid level and run the engine, checking for leaks.
- Drain the radiator. On some 1973 models, you will have to detach the lower radiator hose. Most models are equipped with a drain cock.
- Disconnect the hoses and automatic transmission cooler line. Plug the cooler lines.
- Disconnect the coolant recovery system hose.
- If the vehicle has a fan shroud, detach the shroud and hang it over the fan to provide clearance.
- Remove the mounting panel from the radiator support and remove the upper mounting pads.
- Lift the radiator up and out of the truck. Lift the shroud out if necessary.
- Installation is the reverse of removal. Fill the cooling system and check the automatic transmission fluid level, and run the engine, checking for leaks.
COOLANT DRAINING, FLUSHING & REFILLING
Never add cold water to a hot engine. A cracked engine block or head could result.
- With the engine cold and the heater on, open the petcock at the bottom rear of the radiator. If your radiator doesn't have one, detach the lower hose. Remove the radiator cap. Let the coolant drain into a container.
- Remove the single engine block drain plug on the left side of a six cylinder engine. Remove the block drain plugs from both sides of a V8 engine.
- Fill the radiator with water and let it run out the radiator and engine drains until it comes out clean.
- Close the petcock and replace the block drains.
- Pour in the required amount of antifreeze. Fill the radiator with water.
- Leave the radiator cap off, turn the heater on and start the engine. Run it until the thermostat opens, adding water as necessary. Without a coolant recovery system, the level should be 1 1 / 4 inch below the filler neck hot and 3 in. below cold. With a coolant recovery system, the radiator should be full and the level in the catch tank should be between FULL COLD and FULL HOT.
- Replace the radiator cap.