2002 Winnebago Journey DL, Freightliner chassis, 350 HP CAT. On the way through Mexico we encountered some very bumpy roads and the exhaust system came apart. The separation was right at the exhaust ...
I would push air through and then you will hear the leak. Stay away from the fluid as it's probably toxic. Then slide a smaller hose through the bigger one with some sealer around the smaller one so it sets up and seals the leak. Then give the sealer time to harden and then reconnect the line and add fluid.