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· PassatWorld Elder
8,379 Posts
You need to verify that you have sufficient oil flow and pressure. If not, the oil pickup screen would be high on my list of suspect issues.

How is the cam chain tensioner under the valve cover? Ever been replaced? How many miles on engine?

This is a 1.8 turbo engine, those were notorious for oil coking from the heat of the turbo when using conventional oil.
Make sure you are using VW spec oil that's 100% synthetic.

The two top things I would suspect are cam chain tensioner shoes and or burnt oil, especially if conventional oil has been used for any length of time.
The reason I mentioned cam chain tensioner is because conventional oil attacks the plastic shoes the cam chain rides on leading to deteriorating plastic that breaks off in little pieces and plugs up the pickup screen on the oil pump.
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