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.
2009 Acura CSX Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Intake Air Bypass Control Thermal Valve Replacement
- Remove the engine cover (see step 2 on REMOVAL-K20Z2 ).
- Remove the air intake duct.
- K20Z2 engine (see K20Z2 ENGINE )
- K20Z3 engine (see K20Z3 ENGINE )
- Disconnect the hoses (A).
Courtesy of AMERICAN HONDA MOTOR CO., INC.
* : This illustration shows K20Z2 engine.
- Remove the intake air bypass control thermal valve (B).
- Install the parts in the reverse order of removal.NOTE: Position the valve angle as shown.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.