When adding or changing the fluid in the system, create a 50/50 mixture of high quality ethylene glycol antifreeze and water.
The fluid level may be checked by observing the fluid level marks of the recovery tank. The level should be below the ADD mark when the system is cold. At normal operating temperatures, the level should be between the ADD and the FULL marks. Only add coolant to bring the level to the FULL mark.
DRAINING AND REFILLING
- With a cool engine, slowly rotate the radiator cap counterclockwise to the detent without pressing down on the cap.
- Wait until any remaining pressure is relieved by listening for a hissing sound.
- After all the pressure is relieved, press down on the cap and continue to rotate the radiator cap counterclockwise.
- With a suitable container to catch the fluid under the radiator, open the radiator draincock. If equipped, remove the engine block drain plugs to drain the coolant from the block.
- Loosen or slide the recovery tank hose clamp at the radiator filler neck overflow tube and remove the hose. Holding the hose down to the drain pan, drain the recovery tank. Attach the hose to the filler neck overflow and tighten the clamp.
- Close the radiator draincock and install the engine block drain plug.
- With the engine idling, add coolant until the level reaches the bottom of the filler neck. Install the radiator cap, making sure that the arrows on the cap line up with the overflow tube.
- Add coolant to the recovery tank.
- After filling the radiator and recovery tank, run the engine until it reaches normal operating temperature, to make sure that the thermostat has opened and all the air is bled from the system.
FLUSHING AND CLEANING THE SYSTEM
See Figure 1