Well I was all set to take my new old westy for it's first run to the
mountains. Everything was packed so I went to drive it behind the garage to
plug in the fridge overnight.  Started it up and there was a real clatter
coming from the engine. Consistant loud,tap tap tap like a really loose
lifter or rocker arm. I thought, dry lifter. It'll go away in a few seconds.
No such luck. Drove it around the block a couple of times. No change.

So the westy stayed home and we took the Caravan. Bummer.

I recall reading a recent discussion on the benefits of Marvel Mystery oil.
Is this something I should try? Or... can it be something more serious? What
to do first and where to start looking.

I'm new to things VW, Lots of Triumph experience so mechanicals are not a
mystery. Any help as to what to look for and where  appreciated.
*# water boxer. 249,000 KM. No engine service history available. DH series
digijet.

TIA
Don