Combustion Leak Tester Fast, Economical and Accurate method to test for combustion gas leaks from: . Head gasket leaks . Cylinder head leaks . Engine block leaks NEW & IMPROVED! Dual-Chamber for Higher Accuracy Test The tester features a dual-chamber design for higher accuracy to eliminate false readings. The first chamber will filter out any alkaline particles that could result in a false indication of a combustion leak. Test results in the second chamber will provide a true indication of a combustion leak. Works on: Gasoline and Diesel engines! Kit Includes: . Dual-chamber tester . Tester Fluid (16 oz./480 ml) . Operating instructions Positive Proof that a leak is present when the Tester Fluid changes color 560000 No -