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EM-78 [YD] CYLINDER HEAD CYLINDER HEAD PFP:11041 On-Vehicle Service EBS00SO0 CHECKING COMPRESSION PRESSURE 1. Warm up engine thoroughly. Then, stop it. 2. Using CONSULT-II, make sure no error codes are indicated for self-diagnosis items. Refer to . ● Do not disconnect CONSULT-II until the end of this operation; it will be used to check engine rpm and 3. Disconnect the negative battery cable. 4. To prevent fuel from being injected during inspection, remove 5. Remove glow plugs from all the cylinders. Refer to . CAUTION: ● Before removal, clean the surrounding area to prevent ● Carefully remove glow plugs to prevent any damage or ● Handle with care to avoid applying any shock to glow 6. Install adapter to installation holes of glow plugs and connect 7. Connect battery negative terminal. 8. Set the ignition switch to “START” and crank. When gauge ● Always use a fully-charged battery to obtain specified engine Unit: kPa (bar, kg/cm 2 , psi)/rpm ● When engine rpm is out of the specified range, check the specific gravity of battery liquid. Measure ● If engine rpm exceeds the limit, check valve clearance and combustion chamber components (valves, ● If compression pressure is low in some cylinders, apply engine oil from glow plug installation hole. Then – If compression pressure becomes normal after applying oil, piston ring may be worn or damaged. – If compression pressure is still low after applying oil, valve may be malfunctioning. Check valve for mal- ● If compression pressure in adjacent two cylinders is low after applying oil, pressure may be leaking 9. Complete this operation as follows. a. Turn the ignition switch to “OFF”. b. Disconnect negative battery cable. PBIC0738E : 18 - 21 N·m (1.8 - 2.2 kg-m, 13 - 15 ft-lb) Standard Minimum Difference limit between cylinders 2,991 (29.99, 30.5, 434)/ 200 2,452 (24.52, 25.0, 356)/ 200 490 (4.90, 5.0, 71)/200 SEM112G |