The component with the lowest price in the CRANK-PISTON schematic is the Cir Clip (655).
Parts such as the Crank-piston: Washer, Plate (647), Crank Ass'y, Piston Ring Set (std), Circlip 132116340000 are included in the 6j/8j 1986 Crank-piston parts fiche.
On this parts fiche the Circlip 132116340000 is the most specified component.