Installed Position Of Piston And Piston/Cylinder Allocation

WARNING: This page is about a different car, the 2006 Volkswagen Jetta and 2005 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Valve Position

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Pistons in cylinder 1 and 2:

Large valve pocket for intake valve toward flywheel side -arrows-

Pistons in cylinder 3 and 4:

Large valve pocket for intake valve toward belt pulley side -arrows-

NOTE:

On new pistons, the cylinder allocation is stamped on the piston face in paint.

Pistons for cylinder 1 and 2: identification 1/2

Pistons for cylinder 3 and 4: identification 3/4