Common problem on the PD engines associated with poor quality oil.
Have you been using 505.01 rated oil?

You will need more than just the camshaft.  lifters, cam bearings,
rocker arm & bearing cap bolts (1 time use TTY).  Might as well do the
timing belt while your in there if it hasn't been serviced lately.
If you run a good quality oil (as in better than the dealer Castrol)
it shouldn't be a problem after repair.  I've spoken with a few people
in Europe and they've never seen this problem there.  Its just our
crap North American oil....

There are a few online venders that sell a complete repair kit.  I
refer to it as a "TDI Tuneup".  lol  I know of one car (2004 PD
engine) with almost 600k kms on it.  It's never had the valve cover
off and runs like a top.   I've seen others chew up the camshaft in
100k.  Proper oil is the key.

Jason

On Mon, May 23, 2011 at 10:33 AM, Mark Dearing <VWBrain@aol.com> wrote:
> hey guys have a 05 TDI engine that has eatten up one of the lobes on �the
> camshaft. � Is this a common problem and what causes just one lobe �to get
> eatten up. where is the best place to buy a new one. dealer wants $800 �for
> it. �I was thinking of installing this in a vannie but am having second
> thoughts � later �mark d
>