Radiator Drain Plug: Service and Repair

Drain Cock Replacement

Removal Procedure





1. Drain the coolant from the radiator.
2. Remove the radiator drain stem and seal. The seal usually comes out attached to the stem.
3. Remove the body of the drain cock. Use your fingers or needle nose pliers to disengage the locking tangs from the side tank.
4. Clean the drain.

Installation Procedure





1. Install the drain cock body. Ensure that the body is fully seated in the side tank and that the locking tangs are engaged.
2. Install the seal on the drain cock stem.
3. Install the drain cock. Turn the stem clockwise to lock.
4. Refill the coolant to the proper level.
5. Start the engine. After the engine reaches normal operating temperature, check for coolant leaks.