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.
PCV System: Description
Honda uses a closed system to prevent blow-by gases from escaping into the atmosphere. Carbureted system components include a blow-by filter (located in air cleaner), breather chamber, PCV valve, and connecting hoses. The PCV valve is located in valve cover on Accord, and in breather chamber on Civic and Prelude.
Fuel injected system components include a breather chamber, PCV valve and connecting hoses. The PCV valve is located in the PCV hose leading from the crankcase to the intake manifold.
Use the Manual With the Right Hardware
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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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