If you are refering to the 17mm hex "pivot pin" that attaches the pivot arm to the timing case cover it is not supposed to move. It is a pin that is inserted through the pivot arm that the arm rotates around.

The spring is what provides tension, the shock is the damper.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)