(5.7L - Camaro & Firebird)
- Refill cooling system to half capacity with 100 percent concentration of coolant. Refill remaining system capacity with water, until fluid reaches bottom of filler neck.
- Start engine. With pressure cap removed, idle engine until normal operating temperature is reached. Close air bleed screw when coolant is visible dripping from bleed screw. With engine still idling, add coolant to radiator until coolant level reaches bottom of fill neck. Install pressure cap.