Sludging of the oil pickup screen is common... this causes low oil pressure (at idle or higher rpms).
Removing the oil pan on these engines is easy, so you might want to do that first to check for a restricted pick-up screen.
The other cause is a bad Chain Tensioner (have to remove valve cover and camshafts to replace it.
I removed one on a Passat no too long ago to change the gasket under it:
Make sure that enough oil is in the system (don't over fill, and use VW Approved Synthetic oil) as low oil level will cause the lifters
to also be noisy (it's the hydraulic lifters that you are hearing).
Sunday, July 28th, 2013 AT 11:32 AM