Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Intake Manifold: Assembly
- Apply liquid gasket to the nipple threads, and install the nipple to the intake manifold.
Liquid gasket:
THREE BOND 1105 (Part No. 004403010) or equivalent
Tightening Torque:
T1: 17 N.m (1.7 kgf-m, 12.5 ft-lb)
T2: 25 N.m (2.5 kgf-m, 18.4 ft-lb)
- Install the tumble generator valve assembly onto intake manifold.NOTE: Use a new gasket.
Tightening Torque:
8.3 N.m (0.8 kgf-m, 6.1 ft-lb)
- Install the air intake duct to the intake manifold.
Tightening Torque:
17 N.m (1.7 kgf-m, 12.5 ft-lb)
- Install the fuel pipe assembly to the intake manifold.
Tightening Torque:
6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
- Install the fuel injector pipe LH and connect the LH side fuel hose to the fuel injector pipe LH. Ref. to FUEL INJECTION (FUEL SYSTEMS) (STI)>Fuel Delivery, Return and Evaporation Lines>INSTALLATION>CONNECTING THE FUEL DELIVERY HOSE, FUEL RETURN HOSE AND FUEL HOSE .NOTE: Use a new fuel hose.
- Install the fuel injector pipe RH and connect the RH side fuel hose to the fuel injector pipe RH. Ref. to FUEL INJECTION (FUEL SYSTEMS) (STI)>Fuel Delivery, Return and Evaporation Lines>INSTALLATION>CONNECTING THE FUEL DELIVERY HOSE, FUEL RETURN HOSE AND FUEL HOSE .NOTE: Use a new fuel hose.
- Install the engine harness to the intake manifold and attach the harness brackets holding the engine harness.
Tightening Torque:
19 N.m (1.9 kgf-m, 14.0 ft-lb)
- Install the fuel injector.NOTE: Use new O-rings, rubbers and seal rings.
- Install the bolts which hold fuel injector pipe.
- Connect the connector to the tumble generator valve assembly.
- Connect the connectors to the fuel injector.
- Secure the engine harness to the fuel injector pipe with the harness band (A).
- Install the throttle body to the intake manifold.NOTE: Use a new gasket.
Tightening Torque:
8 N.m (0.8 kgf-m, 5.9 ft-lb)
- Secure the engine harness and vacuum hose using the clip (A), and secure the engine harness to the engine harness stay using the clip (B), and install the bolt which holds the engine harness to the intake manifold.
Tightening Torque:
19 N.m (1.9 kgf-m, 14.0 ft-lb)
- Connect connector (A) to the throttle position sensor and connector (B) to the manifold pressure sensor.
- Install the engine ground terminal to intake manifold.
Tightening Torque:
19 N.m (1.9 kgf-m, 14.0 ft-lb)
- Install the solenoid valve bracket together with the wastegate control solenoid valve.
Tightening Torque:
T1: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
T2: 19 N.m (1.9 kgf-m, 14.0 ft-lb)
- Connect the vacuum hose (B) to the intake duct, then connect the connector (A) to the wastegate control solenoid valve.
- Install purge control solenoid valve 1 and purge control solenoid valve 2.NOTE: Connect the vacuum hose and vacuum control hose as shown in the figure.
Tightening Torque:
T1: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
T2: 19 N.m (1.9 kgf-m, 14.0 ft-lb)
- Attach the connector to the PCV hose assembly.
- Install the connector to the intake duct.
- Install the fuel pipe protector LH.
Tightening Torque:
19 N.m (1.9 kgf-m, 14.0 ft-lb)
- Install the fuel pipe protector RH, and secure the engine harness to the fuel pipe protector RH using the clip (A).
Tightening Torque:
19 N.m (1.9 kgf-m, 14.0 ft-lb)
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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