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Head unit: checks and adjustments
Checking closing clearance (Sc) at exhaust/intake
When checking closing clearance, use a screwdriver to overcome the preload of closing rocker arm spring, thus taking
up any clearance between camshaft and rocker arm. Fit the feeler gauge between closing rocker arm (D) and shim
(1): closing clearance (Sc) corresponds to gauge thickness when it allows the shim to freely turn, with no remarkable
play.
Clearance must be within the specified limits (Sect. C 1.1, Timing/valves).
If not so, remove the closing shim (1) as described in paragraph
the adequate size to obtain specified assembly clearance.
Note
Spare closing shims are available in 2.2 - 3.1 size: the size is punched on the shim.
Refit the opening and closing shims as described in paragraph
file:///C|/Documents%20and%20Settings/F4i/My%...manual/wsm/usa/Mon695_MY07_N_4A9_00.62.1.html (4 of 8) [10/7/2008 8:45:21 PM]
"Removing the
valves", Sect. N 4.4, and fit a shim of
"Refitting the
valves" Sect. N 4.4.
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