[san rensho]

Well, it doesn't sound good. I'm assuming that your exhaust is split, in other words, cylinders 1-3 only exhaust out of one tailpipe and the 4-6 out of the other.

If that's the case, then if the AOS were bad, you would get smoke out of both tailpipes. The fact you only get smoke out of one, unfortunately, leads to the conclusion that one bank has a bad cylinder, either oil or coolant is getting out. Hopefully, it's just a cracked head, fairly comman and not an overly expensive fix.

But since you have metal in the filter, I would not start the car. Drop the sump plate and see what's in there and then do a leak down test and then a boroscopy to rule out a bad cylinder.

Hope for the best!