Did a search, still have a few questions please.......... I'm trying to clean the exhaust silencer on the 348. Tried the caustic soad soak x 24 hours......very little if any grunge came out. Still looks oily inside. What is inside a 348 silencer for packing? Thinking of trying a propane torch and burning any crud out. Seems others have cut through the silencer and replaced packing material.......but on a 348?? Not wanting to spend $200 plus on a new one at this time. Thoughts? Want to pain