So thom fitzpatrick says:
> 
> What was the problem?  When I put the new engine lid seal on, it started
> pulling all the air thru the vents, instead of partially thru the
> engine lid.   Well, the air thru the engine lid was _warm_, which alleviated
> the icing problem!  By re-opening the hole in the tin, I started pulling hot
> air from behind the muffler, and it stopped the icing!

Just remember to cover up the hole in the spring-time!  You don't want 
to have to get another engine *that* soon.

Steven 

sjohnson@pcocd2.intel.com