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Mechanic said I would need to replace the valve cover gasket, which fair enough there is some leakage by a bolt or spark plug tube, but there is also a pool of oil under the cylinder plug, that drips all the way down to the transmission. Guessing I need to replace the plug as well? Also some leakage at the front of the engine near the exhaust manifold. Would that be solved by fixing the valve cover leak?
Oil on top of the valve cover is almost certainly just from spilled oil when filling. If it were me I would just replace the valve cover gasket, the cylinder head plug cap at the end, and the VTEC solenoid (if applicable). They are all relatively cheap and could be the cause.