Muffler Issue

[mrsnicks]

A few months ago I had a new 2.5" exhaust installed with h-pipe and turbo mufflers. I get under the car yesterday and the mufflers appear to be ballooning/expanding. What would cause this? Mufflers not flowing enough? It's just a rebuilt 318 with the stock 2bbl carb. Should this be covered/replaced by the shop that installed the exhaust system? If they agree to replace them should I spend a little extra and upgrade the new mufflers going in?

 

[63 fury maxwedge]

I had a problem with mufflers balooning ( and actually splitting one at the seam ) about 40 years ago, they were not turbo mufflers though. The problem ended up being the mufflers were installed backwards, being dierctional the backpressure built up.

 

[coloradodave]

I would think that any reputable shop would take care of you on this. Nothing you did would cause this, unless you're into running down the road, turning off the key, pumping the throttle a bunch of times and then restarting the motor. That's how we used to "season" the old glass packs. We actually got 'escorted' out of Petaluma, CA by a police officer after doing that on their main drag at about 10:00PM, the BOOM echoing off the buildings on both sides of the street, and told not to come back...lol

 

[Ron Ward]

I had an experience similar to that of Coloradodave. My 440 "sneezed" on a cold morning and caused my mufflers to look like they were going to have puppies. Yes, they were turbo mufflers.