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139. If the clearance is incorrect the adjustment shims
are to be changed as follows: Turn the valve
pusher so that the groove is at right angles to the
camshaft's length.
140. Fit tool 999 5022 and depress the valve pressers.
Screw the tool spindle down and adjust its length
so that the presser's groove lies over the edge
and is accessible with the pliers.
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141. Remove the shim with pliers 999 5026.
142. Measure the thickness of the shim with a micro-
meter. Calculate the thickness of the shim which
gives the right clearance.
Ex: Measured clearance: 0.30 mm, (0.012 in.),
correct clearance: 0.40 mm (0.016 in).
Clearance difference: –0.10 mm (0.004 in.).
Measured thickness on the existing shim:
3.80 mm (0.150 in.).
Correct thickness of the new shim:
3.80–0.10 = 3.70 mm. (0.150–0.004 = 0.146 in.).
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