is it possible to suddenly get a major oil leak from a faulty pcv valve?

Asked by Mar 11, 2015 at 03:56 AM about the Mitsubishi Lancer

Question type: Maintenance & Repair

My car has been slowly leaking oil for a while now. Two days ago I discovered that the
valve cover gasket needed replacing and so I did that. In the process I took out the
PCV valve and noticed that it was a bit oily and so I tried to dislodge some of the build
up. I put everything back together and it was all going fine until today when my car
started leaking profusely. I've driven quite a bit over the past two days with no
problems so I can't imagine what it is and it only makes sense that it has something to
do with my maintenance. Apart from the gasket (which I know is not the problem), the
only thing I know that I touched was the PCV valve.

Is it possible for a PCV valve to cause such a major oil leak?

1 Answer

228,615

It's possible, only way to know is re-check your work and see where the oil is coming from.

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