When starting a load I usually cut the air for a couple minutes and let the flames die down, but I've occasionally closed the bypass with some big flame in the box. I'm guessing you'd say that's not a good idea, as I'm dumping a bunch of flame heat into the cat suddenly..Anytime a substrate is heated, it expands, as it cools, it contracts.
The binding agent (washcoat) can develop fractures from rapid expansion and contraction as well as rapid temperature changes (thermal shock). Try to keep air leaks and rapid temperature changes to a minimum.
Have you been running some flame in the box, throughout the burn?Not really. Tell me more
Nope....when I called BK today I was told any 7/8 gasket would work...where I bought it they carry BK...if it was a house brand or BK I dont know.
This could be a source of more confusion. True, you don't have to shovel it out as often but you still have to remove all the ash sooner or later. The need to remove them is not minimized.I addressed this topic with the office staff. Our gaskets are definitely different than off the shelf materials. Apologies for the confusion.