Content .. 133 134 135 136 ..

Porshe 911 (997). Manual - part 135

Removing hoses

5. Unclip the two coolant hoses -1- and aluminium pipe of the brake booster -2- from the holders on the

transverse member and carefully lay to one side.

Fuel distributor pipe

6. Remove cable plug from switch-over valve -3- . Pull vacuum pipes off the switch-over valve

-4-

Cable plug for injection valves

7. Remove cable duct on the fuel distributor pipe. To do this, pull cable plug from camshaft position

sensor -2- and lift up cable duct.

8. Remove fastening screws for fuel distributor pipe -1- and pull fuel distributor pipe together with

fitted injection valves from the intake distributor. Check sealing rings of injection valves and replace
if necessary.

ATTENTION

Material damage through lowering engine

Cables and coolant hoses can be stretched and torn

•

→ Lower the engine with a jack no more than 40 mm maximum

Diagnostic system: reading out fault memory and activating systems

Removing intake distributor, cylinder bank 1-3

697

9. Support the engine with a jack. Unscrew the two collar nuts of the rear engine mounts. Lower the

engine by 30 - 40 mm . Should the period between removal and installation be extended, the engine
must be lifted back into position and temporarily secured with the collar nuts. Attach an appropriate
warning notice.

Screws for intake distributor

10. Remove the four fastening screws of the intake distributor (illustration shows cylinder bank 4-6)

-arrows-

. If necessary, use a mirror to remove the front-most screw. When removing the intake

distributor, leave the fore-most screw in its bore in the intake distributor. Carefully remove the intake
distributor from the engine compartment (carefully release vacuum lines to the switch-over valve).
Replace seals.

Note

Cover engine openings (e.g. intake openings, crankcase, oil lines, open reservoirs etc.) cover with a cloth to
avoid dirt and foreign bodies falling in.

11. Cover engine openings with a cloth.

Removing intake distributor, cylinder bank 1-3

Installing intake distributor, cylinder bank 1-3

1. Clean the sealing surfaces of the intake distributor and crankcase.

Intake distributor seals

Diagnostic system: reading out fault memory and activating systems

Removing intake distributor, cylinder bank 1-3

698

2. Replace the seals in the intake distributor and insert correctly into the grooves of the intake

distributor → Intake distributor seals .

3. Place intake distributor in installation position. At the same time, pull through and lay the vacuum

lines to the switch-over valve -4- .

Note

If necessary, to ease installation of the intake distributor, insert the rear fastening screw in its bore in the
intake distributor before commencing installation.
The socket for tightening the fastening screws of the intake distributor should be secured with a strip of
insulating tape to prevent them falling out.
If necessary, carry out the work using a small mirror.

4. Screw in and tighten fastening screws of the intake distributor, using a magnet if necessary → Tightening

torque: 7.5 ftlb.

Fuel distributor pipe

5. Check sealing rings of injection valves and replace if necessary. Clean sealing surfaces with a lint-free

cloth and apply a thin coat of silicone spray. Insert fuel distributor pipe together with fitted injection
valves into the appropriate openings of the intake distributor and screw in the fastening screws of the fuel
distributor pipe to the intake distributor -1- . Tighten screws → Tightening torque: 7.5 ftlb. .

6. Lift engine into position with the car jack and fasten → Tightening torque: 63 ftlb. .

Cable plug for injection valves

7. Move cable duct into position on the fuel distributor pipe and clip in. Connect cable plugs for

switch-over valve -1- and camshaft position sensor -2- .

Diagnostic system: reading out fault memory and activating systems

Installing intake distributor, cylinder bank 1-3

699