4. DISASSEMBLY, INSPECTION AND REASSEMBLY OF ENGINES 82E-5 – 98E-5 SERIES 4-7 No. Instrument name Application Illustration 14 Nozzle tester For measuring injection spray pattern of fuel injec- tion nozzle and injection pressure 15 Digital thermometer For measuring temperatures 16 Speed- ometer Contact type For measuring revolution by contacting the mor- tise in the revolving shaft Photoelec- tric type For measuring revolution by sensing the reflecting mark on the outer periphery of the revolving shaft 17 Circuit tester For measuring resistance, voltage and continuity of electrical circuits 18 Compression gauge kit For measuring compression pressure