So, when I got this truck, there was a clicking under the hood, come to find out, it was just a piece of plastic getting smacked by my radiator fan, no biggie, but just recently, within the past 2 months, I've had a Dual exhaust put onto my truck, and now, when the truck starts up in the mornings, there's a quite noticeable rattle from under the cab, I'm thinking its the headers to the exhaust pipe. I rev my engine and near the end of the rev, there's a small rattle on top of the loud one, sounds like a loose bolt perhaps? But! once my truck warms up, the rattling goes away....
I live in alaska, and right now its about 5 below in my part of town, I plug in my block heater, I use Iso-Heet for my gaslines, but, I havent had time to get the oil changed, and I've jsut put the 7,000th mile on my truck, I know, shame on me, but my job is normally a 10am-3am, so by the time i get off work, no where is open, and I don't own the equipment to DIY.

Anyone know a possible diaonosis?



oh! and after about 20-40 minutes of letting my truck warm up before i drive, there's nice black soot marks where my exhaust is pointed. 1995
though I'd throw that in.

 

And now, It sounds like my right rear Drum is loose, even though the wheel is securely fastened by the bolts =/

 

sounds like it could be a problem with the catalytic converter.