Block Test Fluid for Block Tester
Now you can detect exhaust gases in the radiator header tank and check for gasket or block damage, cracked heads or cylinder warp.
Block tester is a blue coloured reagent that turns yellow when exhaust gases are present. This simple diagnosis can save you £s. Suitable for petrol and diesel.
Buy Full Block Tester Kit for Petrol and Diesels Cylinder Heads / Gaskets here.
See the How Do I Flush and Refill My Cooling System? and How To Quick Check Head Gasket With Block Tester articles in the Technical Articles section.