Intake Manifold Overview
Intake Manifold Overview
The fuel system is under pressure!
• Before opening the high pressure side components, the fuel pressure must be relieved to a residual pressure. Refer to => [ High Side Fuel Pressure, Releasing ] Service and Repair.
1 Bolt
• 5 Nm
2 Intake Air Temperature Sensor (G42)
3 EVAP Canister Purge Regulator Valve 1 (N80)
• With a double check-valve - item 15 -, as a single component.
• To remove and install, remove the intake manifold. Refer to => [ Intake Manifold with Fuel Rail ] Intake Manifold with Fuel Rail.
4 Intake Manifold
• Removing and installing, refer to => [ Intake Manifold with Fuel Rail ] Intake Manifold with Fuel Rail.
• Bolt tightening specification, refer to - item 15 - in the => [ Fuel Rail and Injectors Overview ] Fuel Rail and Injectors Overview.
• Fuel rail, separating from the intake manifold. Refer to => [ Fuel Rail, Separating from the Intake Manifold ] Intake Manifold with Fuel Rail.
5 Vacuum Actuator
• For the variable intake manifold.
• Checking, refer to => [ Variable Intake Manifold, Checking ] Testing and Inspection.
6 Bolt
• M6 threads - 8 Nm + an additional 90° (1/4 turn. Always replace.
• M8 threads - 20 Nm
7 Connection
• For the fuel supply line from the fuel tank.
8 Fuel Pressure Regulator Valve (N276)
• See the => [ High Pressure Pump Overview ] High Pressure Pump Overview.
9 High Pressure Pump
• With the fuel pressure regulator valve.
• An electric fuel pump , located in the fuel tank, supplies fuel to the mechanical high pressure pump at a pressure of approximately 7 bar.
• When installing the high pressure pump, make sure that no dirt enters the fuel system.
• The fuel system must be pressureless to install the high pressure pump, releasing the high side fuel pressure. Refer to => [ High Side Fuel Pressure, Releasing ] Service and Repair.
• Install the fuel line to the fuel rail free of tension.
• High pressure pump overview. Refer to => [ High Pressure Pump Overview ] High Pressure Pump Overview.
• Removing and installing, refer to => [ High Pressure Pump ] High Pressure Pump.
10 Cam Follower
• Remains in the cylinder head after removing the high pressure pump, it is removable.
11 Connection
• 22 Nm
• Always replace.
• For the high pressure fuel line.
- Check the tightening specification for the connection before installing the high pressure fuel line.
12 High Pressure Fuel Line
• 18 Nm
- Tighten the union nut on the high pressure fuel line hand tight at first. Align so it is free of stress.
13 Intake Manifold Runner Control Valve (N316)
14 Fuel Injectors
• Cylinder 1 fuel injector (N30).
• Cylinder 2 fuel injector (N31).
• Cylinder 3 fuel injector (N32).
• Cylinder 4 fuel injector (N33).
• With a combustion chamber seal (Teflon seal), always replace. Refer to => [ Fuel Injector Seal ] Fuel Injector Seal.
• Replace the O-rings.
• Note the correct installed position.
• Removing and installing, refer to => [ Fuel Injectors ] Fuel Injectors.
• Cleaning, refer to => [ Throttle Valve Control Module, Cleaning ] Procedures.
15 Double Check-Valve
• Deleted
16 Intake Manifold Support
17 Bolt
• 23 Nm
18 Nut
• 10 Nm
19 Bolts
• 5 Nm
• Quantity: 4
20 Throttle Valve Control Module (J338)
• With the EPC throttle drive (G186) , EPC throttle drive angle sensor 1 (G187) and EPC throttle drive angle sensor 2 (G188).
• After replacing, it must be readapted to the Engine Control Module (ECM). Refer to "Guided Functions" in the vehicle diagnostic tester.
• Removing and installing, refer to => [ Throttle Valve Control Module (J338) ] Removal and Replacement.
• Cleaning, refer to => [ Throttle Valve Control Module, Cleaning ] Procedures.
21 Seal
• Always replace.
• The rim of the seal must fit into the groove inside the intake manifold.