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Vacuum Solenoid and Change Over Valve Replacement
 
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Pelican Technical Article:

Vacuum Solenoid and Change Over Valve Replacement

Steve Vernon

Time:

1 hour1 hr

Tab:

$30 to $100

Talent:

**

Tools:

T20 Torx

Applicable Models:

Porsche 955 Cayenne (2008-10)
Porsche 955 Cayenne GTS (2008-10)
Porsche 955 Cayenne S (2008-10)
Porsche 955 Cayenne Turbo (2008-10)
Porsche 955 Cayenne Turbo S (2009-10)
Porsche 970 Panamera 4S (2010-14)
Porsche 970 Panamera GTS (2013-14)
Porsche 970 Panamera S (2010-14)
Porsche 970 Panamera Turbo (2010-14)
Porsche 970 Panamera Turbo Executive (2014)
Porsche 970 Panamera Turbo S (2012-14)
Porsche 970 Panamera Turbo S Executive (2014)

Parts Required:

Solenoid, change over valve

Hot Tip:

Work carefully on the plastic pieces

Performance Gain:

Working variable intake

Complementary Modification:

Oil and filter

There is a solenoid and change over valve on the rear of the intake manifold that works with the variable intake runner system on the Porsche Cayenne. Replacement of these parts is simple once you have the manifold off of the motor.

You will need to remove the engine covers as well as the intake manifold so please see our articles on those procedures before starting this job.

With the manifold loose, lift it up and slide it forward enough to get access to the rear.
Figure 1

With the manifold loose, lift it up and slide it forward enough to get access to the rear.

There is a small vacuum line (yellow arrow) and wiring connection (red arrow) that you need to disconnect from the change over valve at the rear of the manifold.
Figure 2

There is a small vacuum line (yellow arrow) and wiring connection (red arrow) that you need to disconnect from the change over valve at the rear of the manifold.

This photo illustrates the vacuum line to the change over valve; do not forget to reinstall this vacuum line (red arrow) when reinstalling the manifold.
Figure 3

This photo illustrates the vacuum line to the change over valve; do not forget to reinstall this vacuum line (red arrow) when reinstalling the manifold.

To replace the change over valve simply unplug the other vacuum line (yellow arrow) and slip the valve off the rear of the manifold (red arrow).
Figure 4

To replace the change over valve simply unplug the other vacuum line (yellow arrow) and slip the valve off the rear of the manifold (red arrow). Installation is the reverse of removal.

To replace the vacuum solenoid disconnect the vacuum line from the top of the solenoid (red arrow).
Figure 5

To replace the vacuum solenoid disconnect the vacuum line from the top of the solenoid (red arrow).

Use a T20 Torx and remove the five Torx screws (red arrows) holding the rear plate and vacuum solenoid in place.
Figure 6

Use a T20 Torx and remove the five Torx screws (red arrows) holding the rear plate and vacuum solenoid in place. The plate and solenoid are one piece.

The solenoid is connected to the plastic aperture in the rear of the intake manifold.
Figure 7

The solenoid is connected to the plastic aperture in the rear of the intake manifold. Gently open the plate and use a long flathead screwdriver to gently pry the ball and cup apart (red arrow).

You will need to press the ball of the new solenoid onto the ball when installing the new piece (red arrow) but you can do this through the access port in the plate.
Figure 8

You will need to press the ball of the new solenoid onto the ball when installing the new piece (red arrow) but you can do this through the access port in the plate.

This photo illustrates the armature for the variable intake runners (red arrow) as well as the ball socket (yellow arrow).
Figure 9

This photo illustrates the armature for the variable intake runners (red arrow) as well as the ball socket (yellow arrow).

When installing the new piece do not forget to seat the ball and cup socket by gently pushing the ball socket through the open port on the plate (red arrow).
Figure 10

When installing the new piece do not forget to seat the ball and cup socket by gently pushing the ball socket through the open port on the plate (red arrow). Installation is the reverse of removal.

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