Engine Intake System / Exhaust System: Overview Subaru BRZ ZC

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1. Visual inspection Make sure that there is no air suction at the locations shown in the figure. NOTE: If the any of the parts on the intake side is disconnected, cracked or damaged, improper idling will be caused.
2. Check of air cleaner filter element sub-assembly Remove the two clips from the air cleaner case (rear). Lift the air cleaner case (rear) and release the two claws which engage in the air cleaner case (front). Lift the air cleaner case (rear) at an angle as shown in the figure and remove the air cleaner filter element. Check the air cleaner filter element for excessive dirt. Criteria: Not excessively dirty CAUTION: If it is excessively dirty, replace the air cleaner filter element. When cleaning the air cleaner filter element, clean it by blowing air. Lift the air cleaner case (rear) at an angle and install the air cleaner filter element. Engage the two claws of air cleaner case (rear) to the air cleaner case (front). Install the two clips. CAUTION: Make sure that the positioning protrusions at the right and left sides of the air cleaner case do not ride over. Be sure to engage the two claws at the lower side of air cleaner case.

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1. CHECK FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK (Refer to «FUEL SYSTEM (FA20)»(ref-619185-S34644980412014053000000) )
2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL (Refer to «WORKING PRECAUTIONS AND NOTES»(ref-619149-S01292846772014053000000) )
3. REMOVE AIR CLEANER CAP WITH AIR CLEANER HOSE (Refer to «REMOVAL»(/subaru/brz/zc-2012-2016/remont/mechanical/#engine-mechanical) )
4. REMOVE THROTTLE WITH MOTOR BODY ASSEMBLY Remove the 4 bolts and the throttle with motor body assembly.
5. DISCONNECT FUEL HOSE No. 1 (Refer to «INSTALLATION»(ref-619185-S10565260972014053000000) )
6. DISCONNECT FUEL HOSE No. 2 (Refer to «INSTALLATION»(ref-619185-S10565260972014053000000) )
7. DISCONNECT PURGE HOSE (Refer to «INSTALLATION»(ref-619185-S10565260972014053000000) )
8. REMOVE INJECTOR DRIVER (Refer to «INJECTOR DRIVER (FA20)»(ref-619185-S31282493802014053000000) )
9. REMOVE INTAKE MANIFOLD PROTECTOR (for Bank 2) (Refer to «INSTALLATION»(ref-619185-S10565260972014053000000) )
10. REMOVE INTAKE MANIFOLD PROTECTOR (for Bank 1) (Refer to «INSTALLATION»(ref-619185-S10565260972014053000000) )
11. DISCONNECT FUEL DELIVERY PIPE SUB-ASSEMBLY Remove the bolt and disconnect the fuel delivery pipe sub-assembly. Disconnect the No. 2 fuel vapor feed hose and move the fuel delivery pipe toward the front of the vehicle.
12. REMOVE NO. 1 ENGINE COVER SUB-ASSEMBLY Disengage the 3 Claws and remove the No. 1 engine cover subassembly. NOTE: Release the tabs from the front side of the vehicle.
13. DISCONNECT NO. 2 VACUUM HOSE (for Manual Transmission) (Refer to «REMOVAL»(ref-619168-S01330687542014053000000) )
14. DISCONNECT VENTILATION HOSE Disconnect the ventilation hose.
15. REMOVE INTAKE MANIFOLD Disconnect the manifold absolute pressure sensor connector. Disconnect the purge control solenoid valve connector. Disengage the 5 clamps and disconnect the battery cable. Disengage the clamp and disconnect the engine wire harness. Disengage the 2 clamps and disconnect the 4 connectors. Disconnect the fuel pump connector. Remove the 6 bolts, intake manifold and 2 gaskets.

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1. REMOVE MANIFOLD ABSOLUTE PRESSURE SENSOR Remove the bolt and manifold absolute pressure sensor from the intake manifold. Remove the O-ring from the manifold absolute pressure sensor.
2. REMOVE PURGE CONTROL SOLENOID VALVE Disconnect the No. 1 fuel vapor feed hose from the intake manifold. Remove the nut and purge control solenoid valve.
3. REMOVE CAP (for Automatic Transmission) Remove the cap from the intake manifold.
4. REMOVE FUEL DELIVERY PIPE (for Bank 2) Disconnect the No. 3 fuel delivery pipe sub-assembly from the fuel delivery pipe (for bank 2). CAUTION: If the connector and pipe are stuck, pinch the fuel delivery pipe No. 3 by hand and push and pull the connector to disconnect it. Do not allow any scratches or foreign matter on the parts when disconnecting them, as the No. 3 fuel delivery pipe joint contains the O-rings that seal the plug. Do not use any tools to separate the pipe and connector. Do not forcibly bend, twist or turn the nylon tube. If the pipe and connector are stuck together, pinch the tube between your fingers and turn it carefully to free it. Then, disconnect the main tube. Protect the disconnected part by covering it with a plastic bag and tape after disconnecting the main tube. Check that the top hat cannot be pulled out. Remove the 2 bolts and the fuel delivery pipe (for bank 2) from the intake manifold.
5. REMOVE FUEL DELIVERY PIPE (for Bank 1) NOTE: Use the same procedure described for the fuel delivery pipe (for bank 2).
6. REMOVE NO. 3 FUEL DELIVERY PIPE Disengage the 3 clamps and remove the No. 3 fuel delivery pipe from the intake manifold.

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1. INSTALL NO. 3 FUEL DELIVERY PIPE Install the No. 3 fuel delivery pipe to the intake manifold with the 3 clamps.
2. INSTALL FUEL DELIVERY PIPE (for Bank 2) Apply a gasoline to the contact surfaces of the new O-ring on each fuel injector assembly. Install a new O-ring to each fuel injector assembly. Install the fuel injector assembly to the intake manifold with fuel delivery pipe (for bank 2). CAUTION: Do not damage the fuel injector assembly or the O-ring. Do not twist the O-ring. Install the fuel delivery pipe (for bank 2) with the 2 bolts. Standard value: T=19N.m {194kgf.cm} {14ft.lbf} Check that the fuel injectors rotate smoothly. CAUTION: If the fuel injectors do not rotate smoothly, the probable cause is incorrect installation of the O-rings. Replace the O-rings. Position the fuel injector connector outward.
3. INSTALL FUEL DELIVERY PIPE (for Bank 1) NOTE: Use the same procedure described for the fuel delivery pipe (for bank 2).
4. INSTALL CAP (for Automatic Transmission) Install the cap to the intake manifold.
5. INSTALL PURGE CONTROL SOLENOID VALVE Connect the No. 1 fuel vapor feed hose to the intake manifold. Install the nut and purge control solenoid valve to the intake manifold. Standard value: T=6.4N.m {65kgf.cm} {4.7ft.lbf}
6. INSTALL MANIFOLD ABSOLUTE PRESSURE SENSOR Apply engine oil to the contact surfaces of the new O-ring on manifold absolute pressure sensor. Install a new O-ring to the manifold absolute pressure sensor. Install the manifold absolute pressure sensor to the intake manifold with the bolt. Standard value: T=4.0N.m {41kgf.cm} {3.0ft.lbf}

See also:
• REMOVAL