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ENGINE 273 MPFI 109 ENGINE VALVE GUIDES: • In case of valve stem sticking in valve guide before or excessive clearance between them, remove valve guide alongwith valve guide seal fromcylinder head using drift (Part No.2868 5890 06 05). Size Valve type Valve guide bore Valve guide OD Valve guide ID Valve guide in cyl. Head in mm in mm in mm Length in mm Normal Inlet 11 H7 11.055 mm 5.5 ±0.05 33 Exhaust 11 H7 to 11.065 mm Normal 1 Inlet 11.1 H7 11.155 mm 5.5 ±0.05 33 Exhaust 11.1 H7 to 11.165 mm • Using micrometer & bore gauge, take diameter readings on valve stems & guides to determine the stem clearance in the guide. CAUTION Be sure to take a reading at more than one place along the length of each stem & guide. VALVE STEM TO VALVE GUIDE CLEARANCE (INTAKE) STANDARDVALUE WEAR LIMIT 0.025 to 0.051 mm 0.07 mm VALVE STEM TO VALVE GUIDE CLEARANCE (EXHAUST) STANDARDVALUE WEAR LIMIT 0.057 to 0.083 mm 0.09 mm • Check valve guide bore diameter in cylinder head and if necessary, ream valve guide bore in cylinder head to next over size. VALVE GUIDE BORE DIAMETER IN CYLINDER HEAD STANDARDVALUE OVERSIZEAVAILABLE 11 mm H7 11.1 mm H7 • Install matching size valve guide in cylinder head using drift (Part No.2868 5890 06 05) and spacer (Part No.2834 5890 06 02) • Ream valve guide inside diameter. It should be within specified limit . • Fit valve guide oil seals using drift (Part No.2868 5890 06 05) and spacer (Part No. 2834 5890 06 04). VALVEGUIDE INSIDE DIAMETER 6 mm H7 2868 5890 06 05