DESCRIPTION AND OPERATION
Page 59
Rocker Arm Improvements Effective January
2003
Effective January 2003, the following new and
improved components were introduced into
production.
Rocker Arm Shaft
앫 Heavier wall thickness for added strength
앫 Increased radius in all retainer ring grooves,
also for strength improvement
앫 Shaft end closure by pipe plugs, to provide a
more secure closure than the previously
used cup plugs
앫 The shaft has two additional oil supply holes
to each rocker for directed lubrication to the
rocker arm tip-end and adjusting screw
66
Figure 66 — Rocker Arm Shaft
Rocker Arms
앫 Increased casting thickness for added
strength
앫 Carbonitrided steel bushing in shaft bore for
wear resistance
앫 Revised oil passage drilling eliminates the
adjusting screw bore closure plug
5-111.bk Page 59 Monday, July 10, 2006 2:26 PM
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