George, I always put a light coating of RTV silicone on all O-rings 
before installing them.  Keeps them in place while fumbling with the parts, 
insures a perfect seal, keeps corrosion at bay and just all around good 
protection.  Been doing this for many years on all sorts of mechanical 
devices I've worked on.

Cheers��

Frank Condelli
Almonte, Ontario, Canada
<A HREF="http://members.aol.com/BusFusion/bfhome.htm">BusFusion</A> a VW Camper camping event, Almonte, ON, June 12 ~ 15, 2003
'87 Westy & Lionel Trains
Member: <A HREF="http://www.vanagon.com/">Vanagon List</A>, <A HREF="http://www.bcn.net/~limbo/">LiMBO</A>, <A HREF="http://www.westfalia.qc.ca/">IWCCC</A> & Capital City VW Club 
Vanagon/Vanagon Westfalia Service in the Ottawa Valley
<A HREF="http://members.aol.com/Fkc43/stebro.htm">STEBRO/Vanagon Stainless Steel Mufflers</A> �
<A HREF="http://members.aol.com/Fkc43/busindex.html">Frank Condelli & Associates</A> or http://frankcondelli.com