Tag Archives: 4cam

Porsche 904 Race Car Cylinder Heads

I recently repaired / rebuilt a pair of Porsche 904 / Carrera 4cam/rs61 historic race car cylinder heads, photos of the project below…

Porsche 904 Cylinder Heads 1

The work included the repair/welding/machining of damage to the combustion chambers.Fitting new valve guides and valve seats.Re-cutting multi-angle valve seats and re-machining of head gasket sealing faces. Continue reading