Porshe 911 (997). Manual - part 16

Plug for engine compartment temperature sensor (intake distributor 4-6)

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11. Unclip fuel ring pipe on the engine eyelet and unscrew two M6 x 16 Torx screws, remove engine

eyelet.

12. Detach holder for the throttle body on the servo pump. To do so, unscrew an M6 hexagon nut.

Unplug cable plug for potentiometer and line for crankcase venting.

13. Undo holder for servo supply tank on intake distributor 4-6.

3.6l intake distributor

14. Only for 3.6l engine: Remove the relevant six M6 x 35 (micro-encapsulated) fastening

screws for the intake distributor on the intake pipe supports on the left and the right. Pull off
one vacuum line and remove the intake distributor completely.

Intake pipe support

15. Only for 3.6l engine: Remove intake pipe support. Unscrew four M6 x 35 screws, unscrew one M6 x 12

screw for ground strap on cylinder bank 4 - 6. Take off intake pipe support, seal intake openings on
cylinder head (e.g. with adhesive tape).

Intake distributor screw connection

16. Only for 3.8l engine: Unscrew the four M6 x 35 Torx screws. Completely remove the intake distributor.

Seal intake openings on cylinder head (e.g. with adhesive tape).

Diagnostic system: reading out fault memory and activating systems

Disassembling engine - up to crankcase

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17. Remove belt pulley from servo pump. Unscrew three fastening screws and remove belt pulley.

Three-phase generator

18. Remove generator . Undo the fastening screw on the deflection roller -1- and unscrew approx. three turns.

Using an aluminium mandrel, tap lightly on the screw head to undo the pilot bushing in the generator
swivel arm. Unscrew the screw and remove with the deflection roller. Unscrew the second screw -2- and
carefully take out the generator.

Electrical connections on generator

19. Lift the generator out of the bracket and disconnect the two electrical connecting leads -Arrows- .

20. Remove mount for the coolant vent line. Unscrew one M6 x 16 (micro-encapsulated), remove

mount, replace screw.

Oil mist collector - line connections

21. Unplug all vent lines for oil mist collector.

Diagnostic system: reading out fault memory and activating systems

Disassembling engine - up to crankcase

222

Oil mist collector screw connection

22. Unscrew the two M6 x 20 Torx screws on the oil mist collector mount and pull off collector. Replace two

O-rings during installation. The screws tighten the secondary-air line on the cylinder head 4-6 at the same
time.

Wiring harness on secondary air pump

23. Unscrew one fastening screw for the wiring harness guide on the bracket for the secondary-air pump -1-

and unclip the guide -2- on the bracket -Arrow- .

Secondary air pump with bracket

24. Remove the secondary air pump. Unplug cable plug, usncrew three M6 x 20 Torx screws on the

bracket -1- and completely take out the pump with bracket and line. Use new seals when installing.

Diagnostic system: reading out fault memory and activating systems

Disassembling engine - up to crankcase

223

Wiring harness on the heat exchanger

25. Release the wiring harness on the holder before the heat exchanger. Then unscrew the plastic

holder.

Releasing wiring harness

26. Undo the wiring harness on the centre of engine (connections to starter) -Arrow- and unclip on the

heat exchanger -1- . Unplug cable plug for knock sensors -2- and oil-level sensor. Then completely
remove the engine wiring harness.

Oil filler neck

27. Remove the oil filler neck. Unscrew 2 M6 x 16 Torx screws (micro-encapsulated), pull out oil filler neck,

check the O-ring and replace if necessary.

28. Remove oil/water heat exchanger. Unscrew the four inner M6 x 16 Torx screws, take off heat

exchanger. Replace O-rings during installation.

Diagnostic system: reading out fault memory and activating systems

Disassembling engine - up to crankcase

224