Belt Drive

Belt Drive

The belt drive in the new 911 engines has been improved compared with previous models through the following measures in particular:

- Dual poly V-belt
- Light-alloy torsional vibration damper
- Maintenance-free hydraulic belt tensioner







The use of a 6-groove dual poly V-belt makes it easier to drive the auxiliary units. As a result, two deflection rollers used on the previous models are no longer needed, thereby reducing the weight and torsional mass. The use of plastic pulleys (on auxiliary units) and a redesigned torsional vibration balancer with improved dynamic properties also reduces the weight and torsional mass.







Markings and fixing bores have been applied to the pulley and crankcase to facilitate various maintenance and repair work.