Smelly New Exhaust

[350k5]

About 3 weeks ago I got a new new stainless steel exhaust put on my K5. Headers, into Y-Pipe, Cat, Y-Pipe and dual Flowmasters. Really makes the truck sound a lot nicer then it did with the glass packs or whatever the PO had put on there.

However, I notice that when I get out of the truck there is a burning plastic like smell coming from under the truck, right by the drivers side (right where the Cat is) and I'm a little unsure as to what it could be. Kind of stumped really, any suggestions would be appreciated.

 

[Hogback Fabrication]

My exhaust smoked and smelled weird for a while after I installed it. It will probably go away in a week or two.

 

[big jimmy 91]

Run over any plastic bags lately?
I've seen them touch stick and burn against hot exhaust
Also had one take out my pinion seal one time lol.

 

[dave_90_blazer]

as long as there is nothing laying on the exhaust, it will go away

 

[dyeager535]

You might just want to stick your head up under there. Since cats were never installed on the drivers side, maybe you are melting any undercoating that may be on the vehicle.

 

[PsychoticDeadGuy]

My cat is on the driver side...I thought all K5s had the cat on the driver side?!?!

 

[seschev3]

It is most likely burn off of a ceramic coating or paint from the headers. If you have made a visual check of wire harnesses and other parts near your entire exhaust system you will be okay in a couple of weeks. If it is your cat, add a heat sheild.

 

[barneybasher1010]

my cat is on the drivers side also. When I replaced it it smelled for a couple of weeks then went away.

 

[dyeager535]

Hey, I could be wrong, it's been a few years since I had a cat on one of these trucks. The GM RWD cars I've dealt with are all passenger side cat, but I recall that the trucks were on the same side as well, factory. (K5 anyways)

There were tons of exhaust configurations the same year depending on emissions class, unfortunately I don't have my service manual handy to check the routing for all of them.

I know there was at least one post of the passenger floor being hot attributed to the cat converter, can't find it. Just curious now.