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.
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HOMESERVICE MANUALSHONDA2008CIVIC SI, 4D SEDANREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 3 (INTAKE AIR SYSTEM (R18A1 ENGINE))IMT VALVE REPLACEMENT
2008 Honda Civic Si, 4D Sedan
IMT Valve Replacement
2008 Honda Civic Si, 4D SedanSECTION IMT Valve Replacement
WARNING: This page is about a different variant/trim than selected.
- Remove the IMT actuator (see IMT ACTUATOR REMOVAL/INSTALLATION ).
- Remove the IMT cover (A).
- Remove the bolts (B) and the IMT valve (C).
- Install the parts in the reverse order of removal with new O-rings (D).
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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.