ENGINE 25 Fig. 5 VALVE SEAT INSERTS: Fig. 5 INLET EXHAUST Standard Repair Standard Repair Repair size-I size-II size-I size-II O.D. of valve seat 45.880 46.180 46.380 38.080 38.380 38.580 insert 'I' mm 45.870 46.170 46.370 38.070 38.370 38.570 Basic bore in cylinder head 45.825 46.125 46.325 38.025 38.325 38.525 for valve seat insert 'I' mm 45.800 46.100 46.300 38.000 38.000 38.500 Interference of valve seat insert in cylinder head. mm 0.045-0.080 0.045-0.080 Depth of parent bore in cylinder head 'J' mm 11.2 - 11.0 11.2 - 11.0 Height of valve seat insert 'K' mm 8.0 - 7.9 8 2 - 8.1 Distance of parting surface of of cyl. head from face of valve seat insert 'G' mm 3.3 + 0.2 3.1 + 0.2 -10' -10' Valve seat angle in cyl. head 450 -20, 45 0 -20, Valve seat free cutting angle – 150 Width of valve seat in cyl. head 'H' mm 1.6-2.0 2.0-2.5 Maximum diameter of the valve seat in cylinder head 'F' mm 43.4 - 43.38 35.4 - 35.38
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