Surface Variation - Head-to-Block

Dimensions
Chamfering Of Cylinder Bores: See Note
Height "H" Of Crankcase When New: 282.25 - 282.35 mm
Minimum Height After Necessary Stock Removal [1]: 281.95 mm
Permissible:
Deviation:
Of Parallelism Of Upper-To-Lower Contact Surface Of Crankcase In:
Longitudinal Direction: 0.10 mm
Transverse Direction; 0.05 mm
Unevenness:
Lower Crankcase; 0.04 mm
Upper Crankcase: 0.03 mm
Peak-To-Valley Height (Hz):
Lower Crankcase: 0.025 mm
Upper Crankcase: 0.005 - 0.020 mm
Test Pressure With Air In Water In Bar Gauge: 1.5 bar

[1] The stock removal at the crankcase and at the cylinder head of an engine must together not be more than 0.4 mm.

NOTE:
^ Face crankcase together with the timing case cover.





^ After facing, chamfer the cylinder bores as shown in the illustration above.





^ Chamfer cylinder bores with a suitable hand-milling cutter as shown in the illustration above. Equalize bottom edge of chamfer with polishing stone.