Broken exhaust pipe

The RH exhaust pipe on my 850 Interstate broke. When I gave it a good hard look I could see that the pipe had been cracked for some time due to the different color of the metal at the break. Luckily I had a new RH pipe that I had picked up sometime in the past. Always pays to be a packrat!
The problem I am having is that the stub of the pipe that is still in the muffler won't come out. I can only assume that maybe carbon had built up around the pipe and isn't allowing it to come out. Hell I can't even get it to rotate. Ideas?

Thanks
John in Texas

WD40 and a hammer.

Still won't come out? Get a bigger hammer!

grandpaul said:

WD40 and a hammer.

Still won't come out? Get a bigger hammer!

Click to expand...

I tried heat and a pipe wrench but nothing. Going to see if I can get a hack saw blade inside and split the pipe.

John in Texas

How much heat ?
You may need the oxy and get it red hot - and then (carefully) beat it off with that hammer.
It has been heat cycled, quite hot, repeatedly. They can almost bond together with that treatment, plus some internal corrosion.
If the hacksaw blade doesn't work, a thin chisel inserted between them, and heat, may release them.

Naw heat is what fused these parts and both parts swell up similarly by time outer is expected glowing hot enough. Acid attack is best for this as attacks the rust rather faster than unoxidized steel, rust turns to reddish moosh that will release pressure and chemical bonding then heat the inside to glowing so it swells up spreading outter then as inner cools try shocking and twisting extracting. Wax and tape can mask off so drips don't harm anything that still got some gleam. About any strong inorganic acid with work pretty fast whilel weak organic acids takes longer and don't need masking just cover the whole area for a few days. May leave area so clean it'll take a polish to shine even if not chrome brilliant, will take a close double look to really tell and then still pleasingly non rust finish.
https://www.google.com/?gws_rd=ssl#q=ni ... id+on+rust

hobot said:

Naw heat is what fused these parts and both parts swell up similarly by time outer is expected glowing hot enough.

Click to expand...

You have obviously never heated up something with the oxy - by the time the outer is glowing red, it will likely have swelled away from the inner.
Rusted together parts miraculously parted again.
Ever seen railway loco wheels glowing red fitted to their inners, removal the same way = centuries old technology.

Sure try the outside first to glowing but have found at times the inside or steel stud in alu rather than surround worked better. Shoot if don't care about saving the inner tube then I'd slice off leaving and inch or so extension then try to just squeeze crush inner tube down and maybe slice it a few times to help crush in and release. Would be a mean lesion it the repair or new fracture broke in extraction process

When I heated a problem balance tube to red, it about simply fell off, with a little push.
Unless you burn or melt the chrome (unlikely !) they are prefectly good to use again.

OK, well I was able to use a tool that holds a hacksaw blade and split the pipe. Once that was done it came out very easily. Thank you all for your ideas on how to resolve the problem.
John in Texas

Nah-nah-nah-nah-nah--Nah Rohan told ya some simple Norton tasks are beyond your experience to be so annoyingly smug about. Not here to be nasty to anyone, just poking back attitude, so maybe oxy/acyl blasting short of melting would of got apart like normal, but I'd be pensive of metal weakening price worth the labor saving. Neither our thoughts followed except destroying one or more things to save something else caveman solution.

Worst stuck up exhaust systems I broke myself on instead of it was alu marine manifolds with steel fasteners and 3-4" steel tube fittings, as impossible to just undo and redo back, leaves another bad self opinion of me being a mechanic scabbing it back together - seasonally - but getting away for a while out running jets skis in yacht like big block jet thrust party boat with front sofa lounge area to rear patio deck shade cover flapping like crazy. JBW has hi temp marine grade even back then...

Perhaps it had escaped your attention Steve that cutting things with a hacksaw is good if you have replacement parts to hand, to replace them.
Undoable perhaps to you....