FA20D Subaru EngineThe FA20D engine had an aluminium alloy cylinder head with chaindriven double overhead camshafts. The four valves per cylinder two intake and two exhaust were actuated by roller rocker ar
fa20d subaru enginethe fa20d engine had an aluminium alloy cylinder head with chaindriven double overhead camshafts. the four valves per cylinder two intake and two exhaust were actuated by roller rocker arms which had builtin needle bearings that reduced the friction that occurred between the camshafts and the roller rocker arms (which actuated the valves).
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