Component overview
1 - Fastening screw M6
2 - Protective cap
3 - Bleeder valve
4 - Fuel injectors
5 - Sealing ring; replace
6 - Retaining clip; check that clip is seated securely
7 - Fuel supply connection
8 - Fuel distributor (or fuel distributor pipe)
9 - Cable plug; check that plug is seated securely
10 - Wiring harness for fuel injectors; clip into place
Note. Please read the most important working regulations and warning notes. Refer to 10 01 AW The most important working regulations and warning notes - as of MY 2003 (All Models Except Cayenne S TIO Titan) .
Scheme 1
1 - Intake-air distributor
2 - Positive crankcase ventilation to cylinder head cover
3 - Sealing ring; replace
4 - Positive crankcase ventilation valve
5 - Fastening screws for bearing cover
6 - Bearing cover for switch-over roller
7 - Fastening screw M8
8 - Vacuum connection for brake booster
9 - Vacuum connection
10 - Vacuum connection for secondary air injection
11 - Vacuum connection for carbon canister solenoid valve
12 - Fastening screw M8
13 - Throttle unit
14 - Fastening screw M6
15 - Vacuum modulator for intake pipe switch-over valve
16 - Vacuum connection for intake pipe switch-over valve
17 - Fastening screw
18 - Changeover lever for switch-over roller
19 - Switch-over roller
20 - Seal for intake-air distributor; check that installation position is correct
21 - Dowel sleeve for fixing gasket; the dowel sleeves must be fitted into the seal when replacing the seal
22 - Fastening screw for intake distributor, M7 x 40
Scheme 2
1. Pull off cable plug on the throttle housing and pull cable out of the clip -arrows-. (Scheme 2)
Scheme 3
2. Loosen the four screws on the throttle housing -arrows-. Remove throttle housing and check condition of sealing ring. Replace sealing ring if necessary. (Scheme 3)
Note. Please read the most important working regulations and warning notes. Refer to 10 01 AW The most important working regulations and warning notes - as of MY 2003 (All Models Except Cayenne S TIO Titan) .
1 - Intake-air distributor
2 - Positive crankcase ventilation to cylinder head cover
3 - Sealing ring; replace
4 - Positive crankcase ventilation valve
5 - Fastening screws for bearing cover
6 - Bearing cover for switch-over roller
7 - Fastening screw M8
8 - Vacuum connection for brake booster
9 - Vacuum connection
10 - Vacuum connection for secondary air injection
11 - Vacuum connection for carbon canister solenoid valve
12 - Fastening screw M8
13 - Throttle unit
14 - Fastening screw M6
15 - Vacuum modulator for intake pipe switch-over valve
16 - Vacuum connection for intake pipe switch-over valve
17 - Fastening screw
18 - Changeover lever for switch-over roller
19 - Switch-over roller
20 - Seal for intake-air distributor; check that installation position is correct
21 - Dowel sleeve for fixing gasket; the dowel sleeves must be fitted into the seal when replacing the seal
22 - Fastening screw for intake distributor, M7 x 40
Scheme 4
1. Release wiring harness to the left and right on the intake distributor. To do this, remove cable clips -arrows- carefully with a small screwdriver and release cable. (Scheme 4)
2. Pull off cable plug on the throttle adjuster and pull cable out of the clip -arrows-. see scheme 210
Scheme 5
3. Disconnect positive crankcase ventilation plug on cylinder head cover -1-. (Scheme 5)
4. Press in plastic connectors on the flange and pull off wires -3 and 4-. (Scheme 5)
5. Unscrew fastening screw for vacuum unit (M6 x 20. hexagon socket) -2- and remove vacuum unit. (Scheme 5)
Scheme 6
6. Pull off cable plug on vacuum flange of intake-air distributor -arrows-. (Scheme 6)
Scheme 7
7. Press in plastic connectors on the vacuum flange and pull off wires -arrows-. (Scheme 7)
8. Lay plastic lines aside.
Scheme 8
9. Unscrew three M8 hexagon socket head bolts on exhaust side -arrows- (two at the side and one fastening screw on center of heat shield). (Scheme 8)
Scheme 9
10. Pull off the vacuum line on the vacuum modulator on the inlet side. To do this, press on the connector.
Scheme 10
11. Unscrew two M6 nuts -1 and 2- from vacuum unit holder. Pull out oil dip stick and remove vacuum unit from its rubber mounts and set it aside. (Scheme 10)
Note. A mirror is very useful when screwing out the fastening screws on the intake distributor.
12. Unscrew all nine hexagon socket head bolts (M7 x 40) on the inlet side of the intake distributor.
13. First raise the intake distributor on the exhaust side and then lift it off on the inlet side.
14. Cover the openings of the cylinder head with a cloth so that nothing can fall into it.
Scheme 11
15. Remove intake distributor seal as well as the seal from the dowel sleeves.