Removing a stuck pipe from Grand Cherokee Muffler

[bargetrav]

Just as the title states, I was able to cut the coupler off the part the goes into the down pipe from the engine to get that side loose, but the straight pipe goes inside the muffler pipe, so can't use the same method. I tried cutting a slit into it to relieve any pressure, but I really don't know what I'm doing anyway, I can trash this pipe to shit, as I'm putting a cat in place of it to pass inspection. This all started when I bought a 94 grand cherokee and have been trying to get it running well, didn't notice it was missing the cat!!

I want to do this without any real cutting, as the new cat I bought is "direct fit" so I can literally just slide it in when I remove this pipe and re-clamp it. I want to avoid taking this to a muffler/welder.

 

[Throckmorton]

I don't think working on stuff like that yourself is a good idea because you can end up with leaks, which are a hazard. A muffler shop just cuts pipes, instead of manhandling them to get them apart, so less chance of damaging a seal. They can also check for leaks with a sniffer.

Cutting and welding it in should be really cheap at a shop, like less than an hour of labor.

 

[bargetrav]

Yea, however I made the choice to remove the other end already so the exhaust is dropped free now as you can see, I cut the coupler off the other end so I'm looking for ideas now as I can't drive it to the muffler shop with the exhaust dragging.

Would getting it nice a glowing hot with something like this make the inside pipe possible come loose?

http://www.harborfreight.com/electric-start-propane-torch-91061.html

 

[Tristicus]

Yea, however I made the choice to remove the other end already so the exhaust is dropped free now as you can see, I cut the coupler off the other end so I'm looking for ideas now as I can't drive it to the muffler shop with the exhaust dragging.

Would getting it nice a glowing hot with something like this make the inside pipe possible come loose?

http://www.harborfreight.com/electric-start-propane-torch-91061.html

Cut it off right before the headers, romp it all the way to the shop. :awe:

 

[bargetrav]

LOL, is there really no way to get it out, would high heat loosen the rust/etc. whatever is holding the two pipes together?

 

[Bartman39]

Just need a torch to heat it and wiggle it around it will just slip out... Where it was clamped makes in indention and is mainly whats causing it not come out... You may have to do the same when installing the cat but also a large rubber mallet comes on pretty handy for hammering it in so you dont deform the other end...

 

[pcgeek11]

Dead Blow hammer and heat on the muffler pipe stub.

 

[BUTCH1]

Exhaust work is one area I won't mess with, too much heating, whacking, aggravation, ect. to be worth it. A muffler shop will get this done in short order..

 

[SpatiallyAware]

How far is the exhaust shop?


You should be able to come up with some makeshift hangers to get you there.


As others said, pretty much anything you do is temporary unless you're welding it. Those slip clamp our dads used to use won't cut it.

 

[5150MyU]

MAPP gas and a quality torch head will get it cherry red, propane doesn't usually work very good.
Wiggle the pipe up and down and back and forth while tapping on the muffler sleeve (go easy).
Then put a 2x4 on the muffler and whack it off.

 

[Bartman39]

whack it off.

Huh...huh he said "whack it off"...:biggrin:

 

[5150MyU]

You have to have some pleasure in the job.

 

[5150MyU]

Those slip clamp our dads used to use won't cut it.

If you are TALKING ABOUT THE u= CLAMP YOU ARE SADLEY MISTAKEN.

 

[bargetrav]

Update, propane torch isn't powerful enough I'm not about to go buy anything else since I should only be out 100 bucks for a muffler shop to cut it off at the muffler inlet then weld my new cat in.

 

[5150MyU]

MAPP gas comes in handy for other stuff too.
Granted you don't use it all that often but it is nice to have short of oxyacetylene.
Also you get that fuzzy feeling of doing the job yourself.

 

[WackyDan]

Cut another slit or two... I had to do that on my last exhaust... A dremel actually works well for this as you can get in close and not remove too much material where you don't want to.