So I was off today and decided to play with the car and figure out, and get rid of the smell. First attempt was to copy the "tsb fix" so I bought some clear 3/8" poly tubing and some weather proof 3M tape. Took off the little tube from the tank, pushed the tubing into the hole and taped it down, then taking an idea from nascar I ran the tube out in the corner of the hood and taped it to my wiper. My thought was if it purged, I might see the steam, hot vapor come out the end. Sorry no pic of it taped to my wiper arm LOL.
Went for a trip up the interstate, results, smell seemed less but still noticeable, no visible purge from the tubing. Returned home and opened the hood back up, and could smell it, not overly strong but noticeable, and no coolant in the tube. Kind of disappointed, I would of placed good money on the tank purging, and the vapors being sucked into the cabin air intake.
So I decided to at least try and stop breathing it inside my car, so started looking at how this smell from under the hood was making it to my cabin air intake. I noticed 2 opening one where the back hood seal ends, about 3/4" from the fender and the fender, hood gap. So that got a piece cut from some foam pipe insulation....
Then I taped up the other hole that's under the back hood seal, no before pic, but if you look at your car where I taped you'll see it...
Result of doing this.... No smell INSIDE my car. Now I know this is not a fix or elimination of the real problem, but there doesn't seem to be one of those currently anyways. Something I did notice, before with the car up to full temp, when the heater fan was on 1 with the heat selector all the way up, I could feel the heat start to get a little warmer, it's at this time that I would get the smell, then as the heat would start to temper down a bit the smell would lessen. Tonight I would feel the heat rise a little, and NO smell. Brought a smile to my face.