During a valve adjustment, cylinder 6, the companion of cylinder 1, should have two tight rocker levers at TDC for number 1 cylinder because both the valves should be open as the engine moves through the _______ position.

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During a valve adjustment, when cylinder 1 is at TDC (Top Dead Center) on the compression stroke, its companion cylinder (cylinder 6 in this case) should be at TDC overlap, where both the intake and exhaust valves are slightly open.

During a Valve Adjustment, Cylinder 6, the Companion of Cylinder