At this time the two valves for No.one cylinder need to be closed. The rocker arms ought to be unfastened. Alter No.one&3 Consumption, No.one&2 Exhaust valves. Dilemma: Modifying valves on this motor just isn't uncomplicated. With the toe of the rocker arm the feeler gauge is rather loose. Then since the feeler gauge goes in, it suddenly tightens u