My girlfriend just purchased a 2007 audi A4 2.0T Quattro last week (45, 000 kms). Upon purchasing it I noticed that the valve cover gasket was leaking, and I researched about how the PCV valves fail and cause the crankcases to pressure up.

I replaced the PCV valve - previously had the "E" revision valve in it, new replacement valve is a "P" valve. I also replaced the valve cover gasket, and the PCV gasket.

After cleaning off the engine and driving around for a couple of more days it appears that I still have oil leaking somewhere on the passenger side of the engine bay. I am curious as to what extent of damage this failing pcv valve could have caused. Is it common for the PCV valve to cause other engine seals to leak ie camshaft seals?

It is hard to tell exactly where the oil is now coming from I am going to watch it very closely... But at this point it looks like it could potentially be from the cam seals, and potentially something on the turbocharger (below the Diverter Valve is wet with oil).

Edit: I forgot to mention that the intial leak was drastically decreased after replacing the PCV valve.

 

dont know what other damage would have been caused... hoping someone else can answer that for you. as for PVC if had mine go once and is common in this car. for me it squealed something awful when it was starting to go and got right into Stealership and the swapped it out and cleaned up the oil and been AOK since.