Golf IV R32 :: 2004 - CEL For 17755 / 17748 And Rattle Noise

I just purchased a 2004, knowing it had some issues and I'm trying to get to the bottom of them. The car is throwing a CEL for 17755 and 17748 (more info in my first thread here). I had APR look at the car for a pre-purchase inspection and the tech there felt sure that the issue was that both of the "cam adjusters" were failing and needed to be replaced.

After doing some research here and on Google I really couldn't find much if any information on those parts, so I started wondering if that was really the problem! After finding a TSB online related to the codes I was getting.. it would appear that, according to the VW TSB at least, my timing chain may have elongated and needs to be replaced.

However, I have seen many reports that this is unlikely because the bad timing chain issue was just a Euro thing and was supposed to be fixed before the .:R's were sold in the US.

The symptoms of the car other than the CELL are weak power in upper RPMs (but the low end seems pretty good if not fine) and some rattle noise coming from under the hood in the 1200-2200 RPM range.

This noise goes away in the upper RPM's which makes me think that the tensioner bolt could be bad (spring failure?) so it isn't working well in the low RPMs with low oil pressure.. but then the high oil pressure causes the tensioner to work ok in the upper RPMs. BUT, then why would the car be out of timing in the upper RPMs (I'm assuming poor timing is the reason the power is not there).

If it is just the bolt.. is it as simple as removing it and installing a new one in it's place? Is there a way to check to see if the bolt is bad?

Ok and one more thing! Lastly, when I was trying to hold the RPM's in that range (1200-2200) where the rattle happens, the oil pressure light kept coming on and the cluster said "STOP" the engine. Could these things be related? The oil light has never come on normally. I hope to figure this out without having to tear the engine apart.