Nissan Altima 2007-2012 Service Manual: Intake manifold

Removal and Installation

1. Intake manifold

2. Gasket

A. Follow installation procedure


WARNING: To avoid the danger of being scalded, never drain the coolant when the engine is hot.

1. Remove the engine cover with power tool.

2. Release the fuel pressure. Refer to EC-1579, "Inspection".

3. Remove intake manifold collector. Refer to EM-130, "Removal and Installation".

4. Disconnect fuel tube quick connector at vehicle piping side.

5. To remove the quick connector cap, hold the sides of the connector, push in the tabs and pull out the tube.

CAUTION: • The tube can be removed when the tabs are completely depressed. Do not twist it more than necessary.

• Do not use any tools to remove the quick connector.

• Keep the resin tube away from heat. Be especially careful when welding near the tube.

• Prevent acid liquids such as battery electrolyte, etc. from getting on the resin tube.

• Do not bend or twist the tube during removal or installation.

• Do not remove the remaining retainer on the tube • When the tube is replaced, also replace the retainer with a new one.

• To keep the connecting portion clean and to avoid damage and foreign materials entering, cover the ends of the fuel tubes with plastic bags or something similar.

NOTE: If the connector and the tube are stuck together, push and pull several times until they start to move. Then disconnect them by pulling.

6. Remove the fuel rail with the fuel injectors attached, from the intake manifold. Remove the fuel injector O-rings and use new O-rings for installation.

7. Loosen the bolts in the order as shown, and remove the intake manifold with power tool.


Surface Distortion

• Using straightedge and feeler gauge, inspect the surface distortion of the intake manifold. Inspect the surface distortion of the intake manifold collector. Refer to EM-130, "Removal and Installation".

Standard : 0.1 mm (0.004 in)


Installation is in the reverse order of removal. Follow the procedure below for specific tightening sequences and procedures.

• Install intake manifold bolts in two steps in the numerical order as shown.

NOTE: After installation, it is necessary to re-calibrate the electric throttle control actuator as follows: 1. Perform the "Throttle Valve Closed Position Learning" when harness connector of the electric throttle control actuator is disconnected. Refer to EC-1053, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement".

2. Perform the "Idle Air Volume Learning" when the electric throttle control actuator is replaced. Refer to EC- 1053, "IDLE AIR VOLUME LEARNING : Special Repair Requirement".

• Install the quick connector as follows: - Make sure no foreign substances are deposited in and around the fuel tube and quick connector and that there is no damage.

- Align the center to insert the quick connector straight onto the fuel tube.

- Insert the fuel tube until a click is heard.

- Install the quick connector cap on the quick connector joint. Align the arrow mark on the quick connector cap to the upper side.

- Install the fuel hose into the hose clamp.


Make sure there is no fuel leakage at connections as follows: 1. Apply fuel pressure to fuel lines by turning ignition switch ON (with engine stopped). Then check for fuel leaks at connections.

2. Start the engine and rev it up and check for fuel leaks at connections.

CAUTION: Do not touch engine immediately after stopping as engine is extremely hot.

NOTE: Use mirrors for checking on connections out of the direct line of sight.

    Intake manifold collector
    Removal and Installation 1. Power valve (RH) 2. Intake manifold collector 3. Gasket 4. Power valve (LH) 5. Electric throttle control actuator REMOVAL WARNING: • To avoid the danger of bein ...

    Exhaust manifold and three way catalyst
    Removal and Installation 1. Exhaust manifold heat shield (RH) 2. Air fuel ratio (A/F) sensor 1 (bank 1) 3. Exhaust manifold (RH) 4. Gaskets 5. Heated oxygen sensor 2 (bank 1) 6. Three way cata ...

    Other materials:

    Heater & cooling unit assembly
    Removal and Installation COMPONENTS 1. Steering member 2. Heater and cooling unit 3. Blower unit REMOVAL 1. Discharge the refrigerant from the A/C system. Refer to HA-24, "HFC-134a (R-134a) Service Procedure". 2. Drain the engine coolant from the cooling system. Refer to CO-1 ...

    Power distribution system
    System Description INPUT/OUTPUT SIGNAL CHART SYSTEM DESCRIPTION • PDS (POWER DISTRIBUTION SYSTEM) is the system that BCM controls with the operation of the pushbutton ignition switch and performs the power distribution to each power circuit. This system is used instead of the mechanical ...

    Air conditioning cut control
    System Diagram System Description INPUT/OUTPUT SIGNAL CHART *1: This signal is sent to the ECM through CAN communication line. *2: ECM determines the start signal status by the signals of engine speed and battery voltage. SYSTEM DESCRIPTION This system improves engine operation when ...