Cam follower removal and installation procedure for smart fortwo 454 engine 639.939, showing cylinder head and hydraulic valve clearance compensation elements.

Engine bay photo, cylinder head diagram, and cam follower component with numbered callouts and service steps table.

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See all Powertrain figures for the Fortwo / Forfour (453), or browse the full figure library. Part numbers and callouts are community-sourced and cross-referenced against the manuals — confirm with your VIN before ordering.