Gunson, brand leader in automotive diagnostic tools, know that the cylinder leakage test is the simplest way to identify damaged valves, worn piston rings, blown head gaskets or a cracked cylinder head. Their new dual-gauged Leak Detection unit (Part 77005), priced around £80 has a 3/16" Flexi hose (200psi), 14mm and 18mm adaptors plus fixed short M14 X 25mm and fixed long M14 X 220mm connectors. The Leak Detection Unit is a valuable addition to every workshop and the extra long adaptor makes it suitable for Ford Zetec and GM Ecotec deep seated engines.