Getting crusty/rusty mufflers off of pipe

[AJMBLAZER]

I'm trying to redo the mufflers on Big Ugly. They've been there a while but the pipes are in pretty good shape. They have surface rust but are sound. However one of the mufflers has bad rust by the lip of a seam so I'm taking the opportunity to replace them with some Cherry Bombs that I found that should be a direct replacement.

However they're on there good and tight and won't wiggle off as I'm pulling on them. I took the clamps off of each end, whacked them with the hammer all over, and doused each end in PB'laster.

Any thoughts on how to get the mufflers out?

 

[slyguy_22]

Air chissel is the way to go! if u dont have that try a lil propane torch and a good hammer, (becareful with the flame) Good Luck

 

[AJMBLAZER]

Yeah, not looking to burn myself.

How much damage would the chisel do to the pipe? I happen to have one of those.

 

[tomford]

sawzall... watch out though the exhaust might hit you in the head

tom ford

 

[AJMBLAZER]

I want to save the pipe.

 

[80' 427]

My favorite way is to use the oxy ace torch and heat the ring where the clamp was red then before it cools wiggle it back and forth. Can save both the pipe and muffler and your hearing.

 

[AJMBLAZER]

I'm going to try some heat and then after that the cutting wheel comes out. I'll try and notch the muffler but save the pipe underneath.

 

[k30bb468]

If you don't have torches use a grinder on the muffler inlet /outlet , make 2 or 4 cuts where it slips over the pipe that you want to save ,then it should slide right off

 

[Russell]

I usually cut the pipe with the sawzall right where it comes in and out of the muffler. You can then use a grinder to cut through the ring that is still stuck on the pipes and slide it off. Then just install your new mufflers like normal

 

[Thunder]

I usually cut the pipe with the sawzall right where it comes in and out of the muffler. You can then use a grinder to cut through the ring that is still stuck on the pipes and slide it off. Then just install your new mufflers like normal

Yup. Easist way i have found too. Doesn't thake a lot of time and leaves plenty of pipe to work with.
You can even use a hack saw if you dont have a SA or grinder

 

[gmc4cw]

X3 on cutting through the muffler right where the pipe is crushed. you will only lose 1" of pipe, if that.

 

[buefchris]

BITE THE BULLET....Sawall or hot-wrench!!!

 

[Chevy305]

I usually cut the pipe with the sawzall right where it comes in and out of the muffler. You can then use a grinder to cut through the ring that is still stuck on the pipes and slide it off. Then just install your new mufflers like normal

Thats the exact method I just did since both my exhaust hangers on the passenger side broke this morning . So instead of doing the "coat hanger" trick I thought I'd just cut the muffler off.

But now I realize that it is HELLA LOUD with no passenger side muffler! LOL...

Oh well you know how it goes, fix it later...