Tips for seized and rounded bolts

[Veraciousreasoning]

So im removing this bar so I can put my carb in. The bar goes to my long broken air pump. The bolts are pretty seized and rounded. What tips you got for removing the bolts. 

 

I tries pb blaster and a torch but the metal seems very old and soft 

Edited September 14, 2023 by Veraciousreasoning

[Ooph!]

If penetrating oil doesn't work after a good soak and sufficient time like a day or so, the best method I've ever used especially for bolts broken at or below the surface is to use a Mig welder

U tube has many how to video's

 

[thisismatt]

I read the first sentence about 8 times and I'm still lost

[banzai510(hainz)]

2 hours ago, Veraciousreasoning said:

So ik removing that bar so I can out my car in.

 

22 minutes ago, thisismatt said:

I read the first sentence about 8 times and I'm still lost

That sentence????????????

[thisismatt]

37 minutes ago, banzai510(hainz) said:

 

That sentence????????????

Yes?

[Veraciousreasoning]

Sorry about that. I fixed it. Its a bar that runs next to my valve cover that goes to my air pump. Here is a picture of the bolts I'm working with. They are all old, soft, and the second you try to turn it just mushes the metal.  Its the ones with the metal tubes coming out. I've been hitting them with pb blaster every 30-40 minutes or so and I think IPP spray them down and let them soak over night 

Edited September 14, 2023 by Veraciousreasoning

[banzai510(hainz)]

OHHHH   THOSE!!!!!!!!!!!!!!!!!

 

throw manifold away if possible

[Veraciousreasoning]

57 minutes ago, banzai510(hainz) said:

OHHHH   THOSE!!!!!!!!!!!!!!!!!

 

throw manifold away if possible

Wait what? Through away the exhaust manifold?

[NC85ST]

Two options I can think of are (1) if the engine runs, crank it up and get it to operating temperature and then try to remove them. (2) cut the tube’s off and weld up the holes. Sorry, I forgot you have the carburetor off. Cut the tube’s off and use a socket.

[NC85ST]

Still looked at it wrong. You’re trying to remove the exhaust manifold bolt/nut. Heat. If the engine was in running condition, it wouldn’t be that hard. Run the engine to operating temperature and use vise grips on it.

[DwayneOxford]

Those old line/tube nuts are gonna require heat and that may not work. Manifold needs heated/expanded with a torch, nuts need cooled/shrunk with liquid CO2 and a line wrench used. Best option is prob cut tube off and plug with silicone. Have saw them cut off 2-3" long, mashed flat at the end and folded over and mashed more.

[Veraciousreasoning]

1 hour ago, NC85ST said:

Still looked at it wrong. You’re trying to remove the exhaust manifold bolt/nut. Heat. If the engine was in running condition, it wouldn’t be that hard. Run the engine to operating temperature and use vise grips on it.

I'm gonna torch it till it's red hot then. 

[Veraciousreasoning]

1 hour ago, DwayneOxford said:

Those old line/tube nuts are gonna require heat and that may not work. Manifold needs heated/expanded with a torch, nuts need cooled/shrunk with liquid CO2 and a line wrench used. Best option is prob cut tube off and plug with silicone. Have saw them cut off 2-3" long, mashed flat at the end and folded over and mashed more.

I'm gonna try my best and if not do I do the silicone caps? 

[DwayneOxford]

Whatever it takes to seal them off. Gonna be exhaust pressure there. Silicone'll prob need replacing occasionly. I'd leave them long and crimp them shut but I'm not concerned with appearance. Those nuts were barely adequate when new, never intended for removal years/miles later.

[Veraciousreasoning]

2 hours ago, DwayneOxford said:

Whatever it takes to seal them off. Gonna be exhaust pressure there. Silicone'll prob need replacing occasionly. I'd leave them long and crimp them shut but I'm not concerned with appearance. Those nuts were barely adequate when new, never intended for removal years/miles later.

Yeah seems pretty fucked if you asked me. I'm gonna torch the shit out of them today and see if I cant get them off. I'd prefer to get them off but if not I'll get some caps and crimp them shut. 

[datzenmike]

Those tubes extend 3-4" down the exhaust port near the valve so best to get them out of there. Get a six point socket, extension and ratchet on it THEN heat around it on the manifold. The socket will keep the hex nut cooler while the manifold heat expands. Then try loosening.

[Stoffregen Motorsports]

I have cut the tubes off and welded them shut before, but installing a plug is the better way.

[Veraciousreasoning]

1 hour ago, datzenmike said:

Those tubes extend 3-4" down the exhaust port near the valve so best to get them out of there. Get a six point socket, extension and ratchet on it THEN heat around it on the manifold. The socket will keep the hex nut cooler while the manifold heat expands. Then try loosening.

I'll try it out later today