Leaky K Line smoke units in GS6 and GS4

Well, one of two things, ….either the smoke unit itself isn’t sealed, or the top of the smoke unit’s exhaust isn’t quite making a good seal against the shell,…..the residue you’re seeing is more than likely the result of the smoke itself condensing back to liquid form, not a physical liquid leak.  It’s hard to tell from the pics if you’re saturated to the point you need to do something or not……This’ll depend on how much it worries you….if the residue is making a mess, ie; you’re constantly having to clean track, pilot trucks, drips hanging down, etc. then yeah, you’ll have to open them up. If it’s minimal, and presents no real added maintenance chores, then why let it worry you to death?… if the engines run good, and you’re happy with the smoke output, kick the tires, & light the fires….just occasionally wipe them down as best as you can with a lint free rag, …repeat…

Pat

I have a chunk of adhesive backed 1/8" foam that I make gaskets for the stack in these locomotives to minimize the smoke leakage.  As pat says, you also want to make sure the gasket on the smoke unit is intact and the screws holding the PCB on are secure.