Intake Manifold: Installation

WARNING: This page is about a different variant/trim than selected.

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 Bolts And Intake Manifold From Cylinder Head
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 connectors 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 connectors to the intake camshaft position sensor.

Fig 5: Locating Intake Camshaft Position Sensor Connector
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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 To Intake Manifold Protector LH And Clip
Courtesy of SUBARU OF AMERICA, INC.
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
Courtesy of SUBARU OF AMERICA, INC.
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 To Connectors
Courtesy of SUBARU OF AMERICA, INC.
Install the engine harness connector to the engine rear hanger.

Fig 10: Locating Engine Harness Connector To Engine Rear Hanger
Courtesy of SUBARU OF AMERICA, INC.
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 Bolt Securing Bulkhead Harness Connector Bracket
Courtesy of SUBARU OF AMERICA, INC.
Connect the bulkhead harness connector to the engine harness connector (brown).

Fig 12: Locating Bulkhead Harness Connector To Engine Harness Connector
Courtesy of SUBARU OF AMERICA, INC.
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 Nut Securing PCV Pipe To Intake Manifold Protector RH
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 Vacuum Hose From Blow-By Pipe And Bolt
Courtesy of SUBARU OF AMERICA, INC.
Connect the vacuum hose to the rocker cover.

Fig 15: Locating Vacuum Hose From Rocker Cover
Courtesy of SUBARU OF AMERICA, INC.
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 Hose To Throttle Body
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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 To Throttle Body
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: Identifying Intake Duct To Throttle Body And Bolts
Courtesy of SUBARU OF AMERICA, INC.
Connect the vacuum control hose to the PCV valve.

Fig 20: Locating Vacuum Control Hose To PCV Valve
Courtesy of SUBARU OF AMERICA, INC.
Install the A/C pressure hoses to A/C compressor. Ref. to INSTALLATION , Hose and Pipe.
Install the intercooler. Ref. to INSTALLATION , Intercooler.
Install the air intake duct. Ref. to INSTALLATION , 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: Locating Wastegate Control Solenoid Valve Connectors And Clip
Courtesy of SUBARU OF AMERICA, INC.
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 Connector And Exhaust Camshaft Position Sensor Connector
Courtesy of SUBARU OF AMERICA, INC.
Install the under cover. Ref. to INSTALLATION , Front Under Cover.
Lower the vehicle.
Connect the ground cable to battery.

Fig 23: Identifying Ground Cable And Battery
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Fill engine coolant. Ref. to FILLING OF ENGINE COOLANT , REPLACEMENT, Engine Coolant.
Charge the A/C system with refrigerant. Ref. to PROCEDURE , Refrigerant Charging Procedure.
Install the collector cover.