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 Valve Inspection
- Disconnect PCV valve from cylinder head cover and install plug in head cover hole.
- Run engine at idle speed.
- Place your finger over end of PCV valve (1) to check for vacuum.
If there is no vacuum, check for clogged valve referring to step 4).
- Stop engine and remove PCV valve (1).
Install clean hose to valve and check that there is air flow when blowing air into hose from [a] to [b] and that there is no air flow when blowing air into hose from [b] to [a] as shown in figure.
If faulty condition is found, replace PCV valve.
- Remove head cover hole plug.
- Tighten PCV valve to specified torque, see CYLINDER HEAD COVER REMOVAL AND INSTALLATION .
NO RELATED
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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.