Radiator Drain Plug: Service and Repair

Removal Procedure

Caution: Under pressure, the temperature of the solution in the radiator can be considerably higher, without boiling. Removing the radiator cap while the engine is hot (pressure is high), will cause the solution to boll instantaneously, with explosive force. The solution will spew out over the engine, fenders, and the person removing the cap. Serious bodily injury may result. Flammable antifreeze, such as alcohol, is not recommended for use at any time. Flammable antifreeze could cause a serious fire.





1. Install a suitable length of hose on the drain cock nipple.
2. Place a drain pan under the radiator drain cock hose.
3. After the engine cools down, remove the radiator cap.
4. If equipped with diesel engine, using a 1/4 inch drive extension, partially open the radiator drain cock (2) in order to drain the coolant from the radiator.
5. Completely open and remove the drain cock from the radiator.
6. If equipped with gas engine, turn the drain cock (1) until the metal pin on the drain cock is aligned with the opening slot.
7. Pull the drain cock out of the radiator.

Installation Procedure





1. If equipped with diesel engine, install the drain cock (2) using a flat-head screwdriver, close the drain cock.
2. If equipped with gas engine, align the metal pin on the drain cock (1) with the opening slot on the radiator.
3. Push the drain cock into the radiator slot. and close the drain cock.
4. Fill the cooling system.
5. Inspect the system for leaks.