On a project car a Chrysler LeBaron convertable with a 2.2L turbo there was one or more exhaust leaks by the manifold and turbo. Removed head , ex manifold, and turbo. Many broken studs to replace. Milled turbo facing to exhaust manifold but did not mill exhaust manifold facing. Everything back together and leaking. DON'T want to undo everything. IS there a silicone that won't burn off or a way to weld the the two plates at the leak? TIG MIG or BRAZING !