To mm to in Select a new guide bush STD or OS

Bush size

Bush bore diameter

Use STD

10.285 to 10.306 mm (0.4049 to 0.4057 in.)

Use O/S 0.05

10.335 to 10.356 mm (0.4069 to 0.4077 in.)

If the bush bore diameter of the cylinder head is greater than 10.306 mm (0.4057 in.), machine the bush bore to the dimension of 10.335 to 10.356 mm (0.4069 to 0.4077 in.) to install a O/S 0.05 valve guide bush. If the bush bore diameter of the cylinder head is greater than 10.356 mm (0.4077 in.), replace the cylinder head.

(b) Heat the cylinder head to 80 to 100°C (176 to 212°F).

(c) Place the cylinder head on wooden blocks.

(d) Using SST and a hammer, tap in a new guide bush to the specified protrusion height.

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