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EM-60 [QG] CYLINDER HEAD CYLINDER HEAD PFP:11041 On-Vehicle Service EBS00QEN CHECKING COMPRESSION PRESSURE 1. Warm up engine thoroughly. Then, stop it. 2. Release fuel pressure. Refer to EC-52, "FUEL PRESSURE RELEASE" (WITH EURO-OBD), (WITHOUT EURO-OBD). 3. Remove ignition coil and spark plug from each cylinder. EM-27, "Removal and Installation" and SPARK PLUG . 4. Connect engine tachometer (not required in use of CONSULT-II). 5. Disconnect fuel injector harness connector so that no fuel is injected. 6. Install compression tester with adapter onto spark plug hole. ● Use compression gauge whose picking up end inserted to spark 7. With accelerator pedal fully depressed, turn ignition switch to Compression pressure [kPa (bar, kg/cm 2 , psi)/rpm] CAUTION: Always use a fully changed battery to obtain specified engine speed. ● If the engine speed is out of specified range, check battery liquid for proper gravity. Check engine speed ● If compression pressure is below minimum value, check valve clearances and parts associated with com- ● If some cylinders have low compression pressure, pour small amount of engine oil into the spark plug hole – If the added engine oil improves the compression, the piston rings may be worn out or damaged. Check – If the compression pressure remains at low level despite the addition of engine oil, the valves may be mal- ● If two adjacent cylinders have respectively low compression pressure and their compression remains low 8. Install spark plug, ignition coil and harness connectors. KBIA1402E Standard 1,324 (13.24, 13.5, 192) Limit 1,128 (11.28, 11.5, 164) Difference limit among cylinders 98 (0.98, 1.0, 14) SEM387C |