Cut it off and throw it away. The confused your wire set with a set for the air cooled engines. Serves no purpose on the Waterboxer. 

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Dan N
Sent: Saturday, April 09, 2016 8:15 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Spark plug wire and rubber ring

hi all,

there's a large rubber ring on the spark plug wire...

that's that for? Should I push it all the way in against the the spark plug hole or let it hang about 4" from the hole? Pro and con?

thanks

dan