Accurate & Fast Diagnosis of cylinder head gasket leaks Diagnose cylinder head leaks by detecting the presence of CO2 in the cooling system Fluid colour change indicates the presence of CO2 Quick connector for use with 315 / 316 / 317 Series Cap Adaptors Suitable for use with both Petrol & Diesel Engines Supplied with both Standard & Sensitive Reaction Fluid, for accurate diagnosis of cooling system faults A strong colour change from blue to yellow, using either the standard or sensitive reaction fluid, indicates the presence of carbon dioxide in a vehicle’s cooling system.