Sohc definitions

SOHC

Single overhead camshaft: SOHC engines use one camshaft in each cylinder head to operate both the exhaust valves and the intake valves.
Found on http://www.caranddriver.com/reviews/glossary-of-terms-info

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SOHC

Single Over Head Cam. A single cam shaft found in the head or top of the engine that activates the valves.
Found on http://www.encyclo.co.uk/local/22062

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