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Measurement of Compression Pressure 1. Warm up engine and switch off the ignition switch. 3. Fit compression gauge adapter to cylinder head. Compression gauge adapter: : 15 - 20 N ⋅ m (1.5 - 2.0 kg-m, 11 - 14 ft-lb) 4. Ensure the ignition switch is in the “LOCK” position and discon- nect harness connector (gray colored) from injection pump. 5. Crank engine, then read gauge indication. I Always use a fully-charged battery to obtain specified I Engine compression measurement should be made as Compression pressure: Unit: kPa (bar, kg/cm 2 , psi)/200 rpm Standard 2,942 (29.4, 30, 427) Minimum 2,452 (24.5, 25, 356) Differential limit between cylinders 294 (2.9, 3, 43) 6. If cylinder compression in one or more cylinders is low, pour a small amount of engine oil into cylinders through the glow holes I If adding oil helps the compression pressure, piston rings I If pressure stays low, valve may be sticking or seating I If cylinder compression in any two adjacent cylinders is SEM618B NEM005 SEM355F COMPRESSION PRESSURE TD27Ti EM-103 |