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7. Crank engine and read compression gauge indication. Cranking speed: 200 rpm 2 , psi) Standard 3,138 (31.4, 32, 455) Limit 2,452 (24.5, 25, 356) Limit of difference between cylinders 490 (4.9, 5, 71) 8. If the pressure appears low, pour about 3 m (0.11 Imp fl oz) of engine oil through nozzle holes and repeat test. Gauge indication during tests Trouble diagnosis ● Piston rings are worn or damaged. ● If two adjacent cylinders are low, gasket is damaged. ● Valve is sticking. ● Valve seat or valve contact surface is incorrect. COMPRESSION PRESSURE CD20T EM-127 |