WM 477601 Checking Vacuum Pump (Except Cayenne, Cayenne GTS, Cayenne Turbo S, Cayenne S, Cayenne S E-Hybrid, Cayenne Turbo, Cayenne S Diesel, Cayenne (3.0)): Information

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2018 Porsche Cayenne, 2017 Porsche Cayenne, 2016 Porsche Cayenne, 2015 Porsche Cayenne, and 2014 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

Information

The vacuum pump creates the necessary vacuum for the following components and functions:

The variable intake system on naturally aspirated engines (secondary load).
Sports flap exhaust system (secondary load).
The tank leakage test on US vehicles (secondary load).
Wastegate control on turbo vehicles (secondary load).
Brake booster (main load - large connection)

Defects in the specified systems can be caused by a defective vacuum pump. To avoid replacing components based on suspected defects and repeat repairs, the function of the vacuum pump must be checked.

The vacuum pump -1- is fitted at the rear of the right cylinder head on V-engines.

Fig 1: Identifying Vacuum Pump (Mechanical)

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Fig 2: Identifying Vacuum Pump With Connections

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Vacuum pump
Screw, M6 x 25
Sealing ring
Sealing ring
Secondary load connection