3-6. RADIATOR/COOLING SYSTEM - Continued
Open cylinder block drain cocks on each side of cylinder block at rear, below exhaust manifolds and at
front of engine.
Open oil cooler housing drain cock at extreme bottom.
Close radiator drain cock (2), cylinder block drain cocks, and oil cooler housing drain cock.
Fill radiator with soft clean water and install radiator cap (1).
Reconnect batteries (para 4-114). Start and run main engine for 15 minutes.
Shut down main engine.
Open radiator drain cock (2), engine block drain cocks, and oil cooler housing drain cock, and drain
Close radiator drain cock (2), engine block drain cocks, and oil cooler housing drain cock.
Compressed air used for cleaning and drying purposes will not
exceed 30 psi. Use only with effective chip guarding and
personal protective equipment.
Using compressed air, clean exterior of radiator and remove foreign matter obstructing passage of air.
Remove radiator cap.
Fill radiator with solution of 50 percent water and 50 percent permanent antifreeze (Item 29,
Radiator is full when coolant is visible through sight glass (3).
Install radiator cap (1).
Start and run main engine at 1/2 throttle for approximately 5 minutes. Check for coolant leak at drain
cock (2), and tighten if necessary.
Stop main engine after 30 minutes and check coolant level through sight glass (3).
To remove radiator cap when engine is hot, turn radiator cap
slowly with a glove or rag to first stop position to relieve pressure
before removing cap. This ill prevent painful burns.
Add coolant as needed.