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.
2001 Chevrolet MetroFACTORY OEM SERVICE PROCEDURE
Checking PCV Valve Function
NOTE:
Engine must be sealed for PCV system to function as designed. If leakage, sludging or dilution of oil is noted and PCV system is functioning properly, check engine for cause and repair as necessary to ensure PCV system will continue to function properly.
- Disconnect PCV valve vacuum hose from cylinder head cover. Run engine at idle. Place thumb over end of PCV valve vacuum hose to check for vacuum. If vacuum does not exist, remove hose and check for obstruction. If PCV valve vacuum hose is okay, go to next step.
- Turn ignition off. Remove PCV valve. Visually inspect valve for varnish or deposits which may cause PCV valve operation to be sticky, restricted, or cause incomplete seating of valve. Shake valve and listen for rattle of check valve inside. If a clear rattle is not heard, replace PCV valve.
Factory Service Tools
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.