Piston: Description and Operation

Pistons

The pistons are of a symmetrical design; arrows are provided on the piston crown to indicate the installation position. When installing the pistons, it must be ensured that these arrows point in driving direction.

Piston Rings

Three-part rail rings are used as oil scraper rings on the new 911 Turbo in order to reduce the "blow by" gases, which results in a reduction of oil consumption. These very thin rings are able to adapt themselves optimally to the cylinder shape, thereby optimizing sealing quality.