This JEGS combustion leak detection fluid finds head gasket leaks through the cooling system of a gasoline engine. The blue fluid reacts to exhaust gases, turning green for a minor or intermittent leak and yellow for a confirmed head gasket leak.

JEGS 555-BT600 Combustion Leak Detection Fluid Features:

• Detects combustion leaks quickly through the cooling system
• Reacts to exhaust gases, changing the blue fluid to green, then yellow
• A green result indicates an intermittent or very minor combustion leak
• A yellow result indicates a confirmed head gasket leak
• 16 oz. (0.473L) bottle

JEGS 555-BT600 Combustion Leak Detection Fluid Notes:

• For gasoline engines only
• Store in a cool, dry place out of direct sunlight