Howdy Dan Ok, them 2150's have two screws on the BOTTOM that when bolted down to SOME plates interfere with the sealing!!! Pull it off and when upside down hold the plate in position and I'm betting your problem is excess air. The solution is to simply modify the PLATE so the screws no longer interfere with it and the seal can be effective..
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />


professional bovine relocation specialist