Impreza Brighton Coupe AWD F4-2.2L SOHC (1997)
Rocker Arm Assembly: Description and Operation
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The rocker arm has a special surface treatment to improve the resistance to wear which would result from its movement on the rocker shaft.
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The valve side of the rocker arm is provided with a valve rocker adjust screw and nut. Turning of this screw can adjust valve clearance.
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The exhaust valve rocker arms have a "Y" letter design, and each arm operates two exhaust valves.
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The rocker shaft has an oil passage in it.
