Intake Manifold: Installation

Install the intake manifold onto cylinder heads.
NOTE: Use a new gasket.

Tightening torque:

25 N.m (2.5 kgf-m, 18.4 ft-lb)

Fig 1: Locating Cylinder Head, Intake Manifold And Mounting Bolts
Courtesy of SUBARU OF AMERICA, INC.
Connect the fuel delivery hose, fuel return hose, and evaporation hose.
NOTE: If fuel hoses or clamps are damaged, replace them with new parts.

Fig 2: Identifying Fuel Delivery Hose, Fuel Return Hose And Evaporation Hose
Courtesy of SUBARU OF AMERICA, INC.
Connect the connector (A) from oil level switch.
Connect the connector (B) to ignition coil, and secure the engine harness or oil level switch harness to the rocker cover with clips (C) and bolt (D).
Tightening torque:

6.4 N.m (0.7 kgf-m, 4.7 ft-lb)

Fig 3: Identifying Oil Level Switch Connector With Clips And Bolt
Courtesy of SUBARU OF AMERICA, INC.
Connect the connector to the intake oil flow control solenoid valve.

Fig 4: Locating Intake Oil Flow Control Solenoid Valve Connectors
Courtesy of SUBARU OF AMERICA, INC.
Connect the connector to the intake camshaft position sensor.

Fig 5: Locating Intake Camshaft Position Sensor Connector
Courtesy of SUBARU OF AMERICA, INC.
Connect the connector to the knock sensor.

Fig 6: Locating Knock Sensor Connector
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Secure the generator cord to the intake manifold protector LH with a clip.

Fig 7: Locating Generator Cord
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Connect the connectors to front oxygen (A/F) sensor (A) and rear oxygen sensor (B).

Fig 8: Identifying Front Oxygen (A/F) Sensor And Rear Oxygen Sensor Connectors
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Connect the connector to the engine coolant temperature sensor (A), oil pressure switch (B) and crankshaft position sensor (C).

Fig 9: Identifying Engine Coolant Temperature Sensor, Oil Pressure Switch And Crankshaft Position Sensor
Courtesy of SUBARU OF AMERICA, INC.
Install the engine harness connector to the engine rear hanger.

Fig 10: Locating Engine Harness Connector
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Connect the bulkhead harness connector to the engine harness connector (black), and install the bolt securing the bulkhead harness connector bracket.
Tightening torque:

6.4 N.m (0.7 kgf-m, 4.7 ft-lb)

Fig 11: Locating Bulkhead Harness Connector Bracket And Mounting Bolt
Courtesy of SUBARU OF AMERICA, INC.
Connect the bulkhead harness connector to the engine harness connector (brown).

Fig 12: Locating Bulkhead Harness Connector Bracket
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Install the nuts securing the PCV pipe to the intake manifold protector RH, and connect the vacuum hose (A) and vacuum control hose (B) to the PCV pipe.
Tightening torque:

6.4 N.m (0.7 kgf-m, 4.7 ft-lb)

Fig 13: Locating Intake Manifold Protector PCV Pipe Mounting Nuts
Courtesy of SUBARU OF AMERICA, INC.
Install the blow-by pipe to the intake manifold protector RH, and connect vacuum hose to the blow-by pipe.
Tightening torque:

6.4 N.m (0.7 kgf-m, 4.7 ft-lb)

Fig 14: Locating Intake Manifold Protector RH Nuts
Courtesy of SUBARU OF AMERICA, INC.
Connect the vacuum hose to the rocker cover.

Fig 15: Locating Vacuum Hose And Rocker Cover
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Connect the brake booster vacuum hose.

Fig 16: Locating Brake Booster Vacuum Hose
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Connect the preheater hoses to the throttle body.

Fig 17: Locating Preheater Hoses And Clamp
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Install the intake duct to the throttle body, and install the bolts which secure the engine harness and PCV pipe to the intake manifold.
NOTE: When installing the intake duct to the throttle body, align the protrusion (a) on the intake duct to the installation position mark (b) on the throttle body to install.

Fig 18: Identifying Intake Duct Installation Position Mark
Courtesy of SUBARU OF AMERICA, INC.

Tightening torque:

T1: 3 N.m (0.3 kgf-m, 2.2 ft-lb)

T2: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)

Fig 19: Engine Harness And PCV Pipe Mounting Bolts With Torque Specifications
Courtesy of SUBARU OF AMERICA, INC.
Connect the vacuum hose to PCV valve.

Fig 20: Locating PCV Valve Vacuum Hose
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Install the A/C pressure hoses to A/C compressor. Refer to HOSE AND PIPE .
Install the intercooler. Refer to INTERCOOLER .
Install the air intake duct. Refer to AIR INTAKE DUCT .
Lift up the vehicle.
Connect the connectors to the wastegate control solenoid valve, and secure the engine harness with clip (A).

Fig 21: Identifying Engine Harness Clip
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Connect the connectors to exhaust oil flow control solenoid valve (A) and exhaust camshaft position sensor (B).

Fig 22: Identifying Exhaust Oil Flow Control Solenoid Valve And Exhaust Camshaft Position Sensor
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Install the under cover. Refer to FRONT UNDER COVER .
Lower the vehicle.
Connect the battery ground terminal.

Fig 23: Connecting Battery Ground Terminal
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Fill engine coolant. Refer to ENGINE COOLANT .
Charge the A/C system with refrigerant. Refer to REFRIGERANT CHARGING PROCEDURE .
Install the collector cover.