Block Tester BT-700 Combustion Leak Test Kit in Hard Case - Made in USA;

The Block Tester by Test Tools is a complete combustion leak tester and comes in a kit with enough fluid for 16 tests. There are no additional tools needed, and no need to tap into an engine vacuum source. Works with virtually any liquid-cooled internal combustion engine or generator with a closed cooling system including: gasoline, diesel, propane, natural gas and other alternative fuels. Large, single-chamber design provides greater accuracy and uses less test fluid.