PCV Valve Oil Separator
Positive Crankcase Ventilation (PCV) valve and oil separator function to separate oil from entering combustion chamber. If oil enters combustion chamber, oil consumption will be high and white smoke coming out from the exhaust.
- There are two modes of PCV failures,
- PCV valve is stuck at open position symptoms:
- engine misfires at idle
- lean air-fuel mixture (too much air)
- presence of engine oil in PCV valve or hose
- increased oil consumption
- hard engine start
- rough engine idle
- PCV valve is stuck at close position symptoms:
- Increase in internal engine pressure
- Failure of one or more oil seals or gaskets
- Engine oil leaks
- Moisture and sludge buildup inside the engine
- Engine surges and possibly black smoke
Experiencing any of these?
Rough, high or surging idling?
Strange loud intake noises such as whistling, air surge sound?
With or without CEL?
These are signs that you might have a bad PCV/oil seperator.
Contact and consult Autohauz Technik for your free inspection and diagnosis.
Minor or major repairs?
No worry, no job too big for Autohauz Technik to handle.
🔧 A Passat B7 came in for oil seperator and bonet damper replacement, and timing cover leak repair.
🔧 A CC Sport checked in for interval service with Mannol Elite 5W-40 oil change.
🔧 A Golf MK7 1.4TSI came in for window regulator replacement.