The Stovebolt Site Forums The Shop Area Engine Shop exhaust system

I was wondering where the exhaust system originally was routed under a 50 chevy 3100? Did it turn out behind the back tire? I'm headed for the exhaust shop soon and wondering what was the original look ?

47-55 Advance-Design 31xx trucks:

I think that in all years the 3104 pickup had the tail pipe go straight out the rear.

Some years panel-body trucks had the tail pipe go out the side, behind the driver's side rear tire.

Maybe someone can post a link to a pertinent illustration in the Factory Assembly Manual?

It looks like all 1950 1/2 ton tail pipes were the same, and they were like the 51-53 panel-body tail pipes.

The 47-55 Factory Assembly Manual will not help answer your question.

Sorry, my posts here are of no help.

I believe the pickups were originally straight back from the metal heat shield that was under the bed above the muffler, which would be toward the driver side, but turning out [and down] is a good idea

Bill

Bill, I have an original heat shield to go on my 49, and I don't know where it goes. You say above the muffler. I thought it was supposed to go above the rear axle where the exhaust pipe comes over the top of the axle.
Carl

In 47-55 trucks (at least) the heat shield is placed under the wood above the hump where the tail pipe goes over the axle.

Hi. I have a parts manual that shows exhaust routing, if you give me a few days I will post it.

When I had my exhaust done I brought the manual in to the shop so they could see the specs. But the guy at the shop said he had a "card" for my truck and didn't need to look at the book.

They routed the exhaust straight back, then a hump over the axle, then straight out the rear. I believe this is what the book shows.

Here are the pages that show the exhaust and tailpipe system:

http://i128.photobucket.com/albums/p195/BassBucket/52%20GMC/Exhaust.png

http://i128.photobucket.com/albums/p195/BassBucket/52%20GMC/Tailpipe.png

I just had may local muffler shop make me a stainless steel version of the original entire exhaust system. I took them an original untouched system and they made it look exactly the same. There are pics in "More pix in the bolt bucket" in my signature below, but I sort of ad-libed, the tail pipe part because I have a special trailer hitch installed. Its close to where its supposed to be. Hope this helps!

I looked a Stove's pictures of the exhaust system. I have never seen some of the parts before on any truck. I thought that the muffler clamps were flat steel, formed round similar to the rear tailpipe hanger, but without the hanger portion. Could Stove's part's manual have included upgraded hangers and clamps for the purpose of updating the effectiveness of the system over the original design?
Carl

The vintage U-bolts used in U-Joint and differential applications were only flat at the top, then were round at the sides to accommodate the nuts, etc. They are pretty cool looking, and also very hard to find. If this is what you are thinking, that would be really cool to have about 4 of those. But just a little after that era, they just went the bent and threaded round stock. I think they should make them just for us vintage owners. Maybe you can discuss this with the President.

Hey Deve, we are talking about exhaust clamps here. Have you been practicing your Evelyn Wood speed reading, or are you just hi-jacking?
Carl

Nope, what you are describing is the same thing I am. Follows that the same clamp manufacturer was tasked with U-Bolts for exhaust too. That vintage look was cool!

guess I need to re-read, re-read, re-read this thread a few more
times to try and figure out just what in the ell you guys are
talking about!

The exhaust system in the scans look perfectly normal from what
I can tell. What are these odd clamps you're talking about????

dg

I purchased the entire exhaust system for my '52 from one of the parts vendors (Chevs of the 40s probably). The system had a few issues the biggie being that the tailpipe would not engage the muffler. I had to carry it to a local exhaust shop and have them expand the pipe to fit over the muffler outlet. And, the tailpipe went straight out the left rear and turned down toward the ground. It was my understanding that Chevy started pointing the exhaust down so that when the tailgate was lowered all the way down, the exhaust would not be blocked by the tailgate. Of course this is only applicable to trucks without rear bumpers. I don't necessarily like the down turned exhaust as it blows up dust when in off road.

This may lend some insight into the tailpipe change made in 1951.
https://www.flickr.com/photos/advance-design_parts_co/11965080365/in/set-72157631872034068/lightbox/
https://www.flickr.com/photos/advance-design_parts_co/12315086065/in/set-72157640522200463

Thanks, Brad

I assume that tailpipe was used on pickup trucks throughout the rest of Advance-Design years?

I bought a NORS (GM part) tailpipe with that down-turned end, and I wondered if it was the correct style.

dg [/quote]
The clamp/hanger that I was referring to was the one at the front of the muffler, in Stove's picture.
Carl

Bet you'd have to talk to some of the prewar guys or maybe early GMC's.

dg

I think this is the clamp being referred-to in stove's post?

Is that a 47-55 3100 truck muffler-to-frame clamp?
It is not at all like the muffler attachment on my trucks.

The original post is about a 1950 truck.

here is the muffler hanger/strap (47-55 truck)
here is the muffler bracket that is attached to the frame (47-55 truck

The muffler hanger/strap holds the muffler to the bracket.

Yep. Me too. Thanks for doing all the work which I am either unable or too lazy to do.
Carl