ENGINE. 57 VALVE GUIDE SIZE VALVE GUIDE BORE IN CYLINDER HEAD VALVE GUIDE OD, mm VALVE GUIDE ID, mm VALVE GUIDE LENGTH,mm Normal Ø 10 + 0.04/ + 0.023 Ø10.0 x 6 + 0.043/ + 0.034 5.4 45.5(Inlet/Outlet) Normal 1 Ø 10.25 + 0.04/ + 0.023 Ø10.25 x 6 + 0.051/ + 0.040 5.4 45.5(Inlet/Outlet) VALVE SEAT INSERT & BORE DIAMETER IN CYLINDER HEAD SIZE VALVE SEAT INSERT BORE DIA. IN CYLINDER HEAD VALVE SEAT INSERT OUTSIDE DIA. (mm) INLET NORMAL 30.7H7 30.81 H6 NORMAL 1 30.9 H7 31.01 H6 OUTLET NORMAL 26.8H7 26.91 H6 NORMAL 1 27H7 27.11 H6
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