exhaust rust/dirt pile after starting
In the last couple of months I have been traveling alot and haven't driven my D-90 for weeks at a time. Today after driving my Defender, upon returning home, I noticed an area of dirt and rust particles scattered on the floor a foot or so away from where the exhaust tail pipe is when parked. I remember finding similar dirt/rust a few weeks back, also after starting the car after 10 days of being parked. At that time I just thought it had blown in under the garage door, but now I am pretty sure it is the result of starting the engine and the exhaust pipe blowing out this stuff.
I was just wondering if this is something to be concerned about or is it due to my truck being parked for an extended period? The dirt, dust or rust particles that I find on the floor are a very fine brown/redish powder with a hint of a rust odor.
Thanks for any ideas.