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Engine Air Filter Replacement
 
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Pelican Technical Article:

Engine Air Filter Replacement

Casey Gervig

Time:

10-15 minutes

Tab:

$30 to $130

Talent:

*

Tools:

13mm Socket, 7mm Nut Driver, Philips screwdriver, Ratchet

Applicable Models:

Porsche 996 GT2 (2002-05)
Porsche 996 Turbo (2001-05)
Porsche 996 Turbo S (2005)

Parts Required:

Air filter

Hot Tip:

Do not lose the air box mounts when removing the air box.

Performance Gain:

Better air flow

Complementary Modification:

Performance air filter install

Every 15,000 miles or so, you should change the air filter in your 911. The air filter protects the fuel injection system and the air intake system from dust and debris that can be sucked in under normal operation. A free flowing air filter is vital for efficient engine operation.

Begin by loosening the 13mm air box-mounting bolt (red arrow).
Figure 1

Begin by loosening the 13mm air box-mounting bolt (red arrow). 

Next loosen the intake boot hose clamp (red arrow) with your 7mm nut driver or flat blade screwdriver.
Figure 2

Next loosen the intake boot hose clamp (red arrow) with your 7mm nut driver or flat blade screwdriver. You only need to loosen the end that holds the air box.

Disconnect the mass airflow sensor wire harness.
Figure 3

Disconnect the mass airflow sensor wire harness. Squeeze the release lever on the connector (red arrow), and pull the connector up out of the air box.

To remove the air box you will rotate the air box using the intake boot as a pivot point.
Figure 4

To remove the air box you will rotate the air box using the intake boot as a pivot point. 

Once the air box is rotated to this point in the picture you will pull the air box out of the air boot and up out of the engine compartment.
Figure 5

Once the air box is rotated to this point in the picture you will pull the air box out of the air boot and up out of the engine compartment. You will need to push the upper part (blue arrow) toward the front of the car while continuing to rotate the air box (yellow arrow) to get it out without scraping it on the edge of the engine compartment.

With the air box removed make sure that the air box mount bushings (red arrows) are accounted for and properly seated in the sheet metal.
Figure 6

With the air box removed make sure that the air box mount bushings (red arrows) are accounted for and properly seated in the sheet metal. You can see here that during the removal one of the bushings was pulled out of its place (blue arrow). Also, replace if broken the wire holders for the oxygen sensor wires (yellow arrows). If these are broken the wires for the passenger side oxygen sensors could rub on the power steering pulley and cause check engine light to come on in the future. Part numbers for these are: 999-507-544-40-OEM.

With the air box on your work surface, loosen the 9 Philips screws (red arrows) holding the air box together.
Figure 7

With the air box on your work surface, loosen the 9 Philips screws (red arrows) holding the air box together.

Remove the lid of the air box.
Figure 8

Remove the lid of the air box. Remove the old air filter element, and lay the new one in its place. Make sure to replace any broken wire holders (red arrow) if yours are broken. Part number for this one is: 999-507-544-40-OEM. Installation is the reverse of removal.

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