Intake manifold (CFKA, SRMA) — removal and installation (Audi A4 B8)

Table of contents: Fuel rail ↓ Removal and installation the upper… ↓ Removal and installation the lower… ↓ Removal and installation of the cold… ↓

Intake manifold (CFKA, SRMA)

1. Intake air temperature sensor bolt "G42": 9 Nm.
2. Intake air temperature sensor "G42".
3. Electromagnetic valve 1 of the activated carbon absorber "N80".
4. Intake manifold: tighten to a torque of 9 Nm.
5. Vacuum reservoir for charge air regulating flaps (intake manifold regulating flaps).
6. High pressure pump bolts: tighten crosswise to 5 Nm and then tighten to 20 Nm.
7. The connection for the fuel supply line coming from the tank.
8. Fuel pressure regulator "N276".
9. High pressure pump: with fuel pressure regulating valve "N276"; there is an electric heater in the fuel tank. fuel pump, which supplies fuel to the mechanics. high-pressure pump; when installing a high pressure pump, it is necessary to ensure that the fuel. no dirt got into the system; before installing the high pressure fuel pump. the system should not be under pressure, relieve the pressure; install fuel lines without distortions.
10. Roller tappet: can remain inserted after removing the injection pump in the vacuum pump, removable.
11. Fuel supply line nipple: not a spare part, but a component of the high-pressure pump; do not weaken; depending on the design, an adapter is installed between the connecting nipple and the fuel supply. highway; if the adapter is installed, it should be replaced; 40 Nm.
12. Fuel supply union nut. highways: Install fuel lines without distortions; 20 Nm.
13. Intake manifold flap valve "N316".
14. Injectors: replace the seal. and Teflon rings, take into account the installation. position.
15. Fastening nut for intake manifold pipe: 10 Nm.
16. Intake manifold support.
17. Intake manifold pipe bolt: 23 Nm.
18. Throttle body bolts "J338": 10 Nm.
19. Throttle valve control unit "J338", throttle valve drive "G186", throttle valve drive angle sensor 1 "G187" and throttle valve drive angle sensor 2 "G188": After replacing the throttle valve control module "J338", it must be re-aligned with the engine control unit "J623", use the tester for this.
20. Gasket: replace.

Clamp

Tightening torque: 10 Nm.

Starting injector "N17"

Tightening torque: 10 Nm.

Fuel rail

1. Injector: always replace together with the combustion chamber seal (Teflon seal. ring); replace the seal. rings, take into account installation. position.
2. Support ring.
3. Fuel rail: 10 Nm.
4. High pressure pump: with fuel pressure regulating valve "N276"; there is an electric heater in the fuel tank. fuel pump, which supplies fuel to the mechanics. high-pressure pump; when installing a high pressure pump, it is necessary to ensure that the fuel. no dirt got into the system; before installing the high pressure fuel pump. the system should not be under pressure, relieve the pressure; install fuel lines without distortions.
5. Roller pusher.
6. Fuel pressure regulator "N276".
7. High pressure pump bolts: tighten crosswise to 5 Nm and then tighten to 20 Nm.
8. Fuel supply nipple. highways to fuel. ramp: replace, 40 Nm.
9. Fuel supply union nut. highway: 20 Nm.
10. Compression valves (intake manifold flaps).
11. Gasket: replace.
12. Intake manifold.
13. Vacuum reservoir for charge air regulating flaps.
14. Throttle valve control unit "J338", throttle valve drive "G186", throttle valve drive angle sensor 1 "G187" and throttle valve drive angle sensor 2 "G188"; after each removal and installation, or after replacing the throttle control unit "J338", it is necessary to re-adapt it to the engine control unit "J623"; 7 Nm.
15. Intake manifold bolts: 9 Nm.
16. Intake manifold flap potentiometer "G336": when replacing the intake manifold flap potentiometer "G336", it is necessary to adapt the intake manifold flap potentiometer "G336" to the engine control unit "J623"; after each removal and installation of the intake manifold flap potentiometer "G336" or the intake manifold, it is necessary to adapt the intake manifold flap potentiometer "G336" to the engine control unit "J623" using an automotive tester.
17. Fuel pressure sensor "G247": 27 Nm; lubricate the threads with clean oil; always replace the nipple and tighten to 40 Nm.

Starting injector "N17" "1"

Removal and installation the upper part of the intake manifold

To access the injectors, you need to remove the intake manifold from the fuel. ramp. Replace the combustion chamber seal (Teflon) and O-ring. The fuel in the fuel system is under pressure! Disconnect the (-) terminal from the battery. Remove the engine cover. Disconnect the vacuum line "arrow" to the activated carbon absorber. Disconnect the following connectors.

1. Electromagnetic valve 1 of the activated carbon absorber "N80"; 2. Knock sensor 1 "G61"; 3. From the intake manifold flap valve "N316", fuel pressure sensor "G247" and Hall sensor "G40"; 4. From the injectors; 5. Throttle control unit "J338"; 6. Intake air temperature sensor "G42".

Unscrew bolts "1 and 2" and remove the bracket for electrical connectors.

Disconnect the electrical. connector "2" from the low-pressure fuel pressure sensor "G410." Disconnect connector "4" from the Hall sensor "G40." Open clamps "1" and remove both fuel lines. Remove clamp "3".

Disconnect the activated carbon line from the top of the intake manifold and remove the "arrows" at the disconnection point. Remove the el. magnetic valve 1 of the activated carbon absorber "N80" "5". Remove the activated carbon line under the fuel lines and set it aside. Open the clamp "arrow" of the air duct hose and disconnect the hose from the throttle valve module "J338" downwards.

Open the fuel cap union nut. high-pressure lines - bottom arrow - on the fuel injection pump. Unscrew the union nuts and remove the high-pressure fuel line. Open the union nut of the high pressure fuel line on the fuel. ramp.

Remove the coolant line bolt "arrow" from the top of the intake manifold.

Remove screw "2". Loosen the bolts using the "T10347" socket on the wrench from the top of the intake manifold. Disconnect the upper intake manifold from the lower intake manifold.

Remove the N17 starting injector connector. Cover the intake ports with a clean rag. Remove the lower part of the intake manifold.

Install

Replace the high-pressure fuel line connector on the injection pump and fuel rail. Install the intake manifold using the mounting pins (left and right below) onto the cylinder head. Hand-tighten the high-pressure fuel line union nuts. Tighten the intake manifold to torque (Tighten the bolts from the inside out). Tighten the high pressure fuel line to the specified torque. Installation in reverse order.

Removal and installation the lower part of the intake manifold

When removing or replacing the lower section of the intake manifold, it is necessary to re-adapt the intake manifold valve potentiometer "G336" to the engine control unit "J623". Remove the upper section of the intake manifold. Remove the vacuum line "arrow" from the intake manifold flap valve "N316". Remove the intake manifold flap valve "N316" from the holder.

Loosen the oil filter "arrow" using the key "3417" and remove it.

Loosen the crankcase ventilation "arrow" bolts by several thread turns.

Disconnect the engine crankcase ventilation hose "1". Unscrew the connecting nipple "3". Remove the lower part of the intake manifold.

Disconnect electrical connector "1" from the intake manifold flap potentiometer "G336".

Install

Ensure that the injectors are installed correctly. Always replace both fuel supply line fittings. Reconnect the plug connection of the intake manifold flap potentiometer "G336". Install the intake manifold. Installation in reverse order.