GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1996 🢒 Corvette 🢒 Engine 🢒 Engine Cooling 🢒 Radiator Drain Cock Replacement

Removal Procedure

    Notice: When adding coolant, use DEX-COOL® coolant. If silicated coolant is added to the system, premature engine, heater core or radiator corrosion may result. In addition, the engine coolant will require change sooner-at 50 000 km (30,000 mi) or 24 months.

  1. Drain the coolant from the radiator. Refer to Cooling System Draining and Filling .
  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. Refer to Cooling System Draining and Filling .
  5. Start the engine. Check for coolant leaks.