when i got my D i had a lot of work done on it. My cat guts were pretty much dust. So, yes, the honeycomb can be destroyed, but from what I hear its not very common. Erik --- In dmcnews@xxxxxxxxxxxxxxx, "content22207 <brobertson@xxxx>" <brobertson@xxxx> wrote: > Am on Xmas vacation, so this is first time I've seen list all week... > > It is indeed possible to melt the guts of a honeycomb style catalytic > converter. Not sure why (stuff has consistency of ceramic), but I did > so when my car ran too LEAN (remember guys: fuel cools. Until Martin > G's PRV man diagnosed my re-tuned, hence over-advanced engine -- still > getting used to life without a carburetor -- was so rich I could > actually hold exhaust tips in my hands). Telltale sign of stopped up > converter is glowing exhaust AFTER the the thing. I think it's heat > from added resistance. > > Do you live in an area with emissions testing? You'd be amazed how > much restriction a converter puts on exhaust flow. And even when > properly functioning is unreasonably hot. > > Bill Robertson > #5939