Impreza L Sport Wagon F4-2.2L SOHC (1999)
Rocker Arm Assembly: Description and Operation
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The intake valve rocker arms and the exhaust valve rocker arms are installed on the respective rocker shafts which are retained by the camshaft
caps.
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The valve side of the rocker arm is provided with a valve rocker adjust screw & 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 shafts have an oil passage in it.
