Removal Procedure
- Drain the coolant from the radiator. Refer to 
Cooling System Draining and Filling 
.
 
- Remove the radiator drain
stem and seal. The seal usually comes out attached to the stem.
 
- Remove the body of the drain cock. Use your fingers or needle
nose pliers to disengage the locking tangs from the side tank.
 
- Clean the drain.
 
Installation Procedure
- Install the drain cock
body. Ensure that the body is fully seated in the side tank and that the locking
  tangs are engaged.
 
- Install the seal on the drain cock stem.
 
- Install the drain cock. Turn the stem clockwise to lock.
 
- Refill the coolant to the proper level. Refer to 
Cooling System Draining and Filling 
.
 
- Start the engine. After the engine reaches normal operating temperature,
check for coolant leaks.