I bought a set of gaskets for the adapter plate on my weber carb and in reading the instructions that come with the gaskets/adapter plates they tell me to coat the gaskets with grease. That sounds like a good idea but I've never heard of this before. Has anyone here heard of this? I'm replacing the gaskets because I have a bad vacuum leak at these gaskets. These are the adapter plates that mount to the intake, and then the carb is mounted on top of the adapter plates. There are 2 plates about 1/2" thick... so there's a gasket at the manifold...then the first plate, then a gasket on top of the first plate, then the 2nd plate goes on, then a gasket on top of that and then the carb. I've used grease in this fashion on my Polaris Razor at the belt housing to help keep water out. And I've read that these plates have imperfections in them because they're a "cast" aluminum plate rather than a milled aluminum plate. I'm thinking the grease makes up for the imperfections in the plates.