water pipe in place of muffler and it will not unscrew briggs flathead 7 hp

[joemotis]

It is a piece of water pipe 6 inches long and the pipe wrench is starting to collapse it and it will not budge. I thought about welding a lug nut on to the end and using an impact wrench. Anyone else dealt with this?

 

[KustomKartKid]

Does the engine run? If so let it run for a couple minutes and try to back it out while it's hot. The aluminum block should expand at a faster rate than the steel pipe.

 

[stephensimmons]

Cut it off and use a hacksaw blade and split the insert 4 ways and takeva chisle to remove the rest

 

[jackeo21]

I have an odd method of putting the engine sideways in a vice and using the engine to unscrew the pipe, or what's left of it! Totally one of the more annoying things of an engine cleanup :laugh:

 

[gumpit]

Drill a hole the pipe and stick a long screwdriver through the holes.

 

[jbrewton]

I had one like that and I swear they soldered it in like copper pipe.
I'd heat it up (BEING VERY CAREFUL) either with a torch or running and see if he heat releases whatever is holding it in!

 

[davidlamb78]

Ive got the same thing happening with a 3.5 horse. I sprayed a little PB blaster on it tonight. I'll try again tomorrow. Mine doesn't run, or I'd fire it up and let the metal expand.

 

[thejoker]

Heat it up and use a pipe wrench. I just had to do the same thing on 4 tecumseh engines. One I still had to hit the pipe wrench with a bfhammer.

 

[JKautoFab]

ive had that problem

cut it off so you can fit a sawzall in the end and carefully cut the pipe in 3 or 4 pieces. you may cut into the engine if you arent super careful but there is plenty of thread so a little wont hurt your screw in muffler

 

[Inventorpardue]

Heat the block by running it, or using a heat gun, or gently with a propane torch. Melt beeswax around the water pipe so it penetrates the threaded joint. Beeswax is thin when melted, and breaks down the electrolytic bond between block and pipe. Unscrew pipe. Old air cooled machine shop trick learned from Leadhead.

 

[minibike_mayhem]

The beeswax really works i use this method all the time as all the motors i get have usually sat outside for 20 plus years

 

[joemotis]

Stuck water pipe "muffler"

It is a piece of water pipe 6 inches long and the pipe wrench is starting to collapse it and it will not budge. I thought about welding a lug nut on to the end and using an impact wrench. Anyone else dealt with this?

Thank you everyone, the heating it up (it runs) beeswax and BFH sound like the next attempt. The electrolytic bond sounds like the real culprit here.
Last resort will be the 4 cut method.

Cheers!

 

[KustomKartKid]

...and mind your own beeswax !

 

[davidlamb78]

I went out in the garage this morning after spraying mine with PB blaster, and it came right out. It was really stuck yesterday. I has started to pinch the pipe with my channel lock pliers. This morning I cranked a couple times, hit it with some more PB, and it came right out! Then I had to scrape all of the egg sacks and cobwebs out of the exhaust valve area. It looks great now!

 

[mrpat]

Had the same thing happen to my briggs 5hp. What i did was insert another pipe inside the collapsing pipe and used a pipe wrench with a bar on it. Came right out with ease!

 

[jeep2003]

got to be a little carefull with those sometimes theyll pull the threads out with it then youre kinda screwed unless its drilled for a flange