I just did this yesterday. I think the pan rails go under on one end and over on the other. I don't remember which one is over and which one is under. I did trim the cork at a little angle to match the front tab. I used prematex #2. I used silacone on the one I had taken off and the cork was split and bulging out the side where it met the front and rear tabs. I think I over tightened the bolts with the silicone. I started it today and no leaks. The silicone pan did not leak either.
