I was being a little bit sarcastic. For the performance minded some longevity is often given up. However there are different theories as to the value of valve rotation and most engines do not do it including the VW in line 4 engines. 

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Tom Stone
Sent: Sunday, September 09, 2012 3:31 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Low compression, more test results

"Back in the old beetle days "swivel feet" adjusting screws were also used to reduce valve rotation.

Dennis"

I thought valve rotation was essential to keeping valves from burning.  I had a bad experience with burned valves in an air-cooled '76 bus back in the day and the root cause I was given was that the valve wasn't spinning on its seat.  Not true?

Tom