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02-11 0000-00 3. CHECK AND INSPECTION 1) Cylinder (1) Compression pressure test Specified value ▶ Compression ratio 16.5 : 1 Test condition at normal operating temperature (80˚C) Compression pressure Standard 32 bar Minimum 18 bar Differential limit between cylinders Maximum 3 bar The compression pressure test is to check the conditions of internal components (piston, piston ring, intake and exhaust vale, cylinder head gasket). This test provides current engine operating status. Before cranking the engine, make sure that the test wiring, tools and persons are keeping away from moving components of engine (e.g., belt and cooling fan). Park the vehicle on the level ground and apply the parking brake. Do not allow anybody to be in front of the vehicle. - - - (2) Cylinder pressure leakage test If the measured value of the compression pressure test is not within the specifications, perform the cylinder pressure leakage test. Specified value ▶ Perform this test in the sequence of firing order. Do not test the cylinder pressure leakage with wet type test procedure. (do not inject the engine oil into the combustion chamber) - - Test condition: normal engine operating temperature (80˚C) Specified value Whole engine below 25% at valve and cylinder head gasket below 10% at piston ring below 20% |