WM, 477601 Checking Vacuum Pump: Information

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.

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Vacuum pump (mechanical)

Fig 1: Vacuum Pump Components Location

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Vacuum pump with connections