Best Way To Remove These Exhaust Bolts

VTHokieAg · Jun 27, 2014

I bought a 1960 B-275 Diesel and I would like to replace the flange gasket between the manifold and the upswept pipe. I am not sure if these have ever been off the tractor. Right now I am spraying them down with PB Blaster.

robgIN · Jun 27, 2014

heat those nuts up and they will probably come right off .

ralph1111 · Jun 28, 2014

Nut buster

rustyfarmall · Jun 28, 2014

Get your oxy/acetylene torch and heat those nuts red hot, let them cool, and they'll probably come off. If not, repeat the process. If you don't have the torch, now is the time to get one.

Hendrik · Jun 28, 2014

Good advice about heating them.
I was very surprised what an impact wrench did to such frozen nuts after heating. Alternately switch the impact wrench to clockwise rotation an to counterclockwise rotation. (5 blows left, 5 blows right, 5 blows left, etc.)

Robert Major · Jun 28, 2014

Hi as others have said heat, but if it was me I would heat them cherry red, then cool them slowly with cold water. Then try un doing them, going from side to side gently with the wrench to clear threads as they hopefully move . Never try moving them hot you will probably strip the threads off the stud/nut. The water will break the rust loose on cooling, lay off the impact also as you can't feel whats happening to the threads.

Looks to me like they are studs threaded in the manifold. if you break them off ,they may of heat hardened over years of use, cast manifolds can get hard to with the heat from the motor over time. Have had some here a good file won't touch . This might make getting them out or drilling and re threading pretty hard. Go careful with them, slow pace now is better than a huge headache later.
Regards Robert

JRSutton · Jun 28, 2014

agreed

not the only way to do it - but certainly the least
frustrating.

1130Leo · Jun 29, 2014

I had to replace my turbo a few years ago, I asked the same thing, everyone said heat the nuts cherry red and cool, I did, It worked great, had to do a couple of times, I did cool mine with P B Blaster though, not sure if it helped, but i got it apart without breaking anything. Good luck.

1946 BN IHC · Jun 29, 2014

The nut on the right deffinitly is a nut. It will take the heat.
that one on the let looks like a ( from this view) like a stud IF THIS is so heat the casting slowly from the thicker part and let cool several times before even attempting to move

Hendrik · Jun 29, 2014

Robert, you are right about attempting to turn the nuts only at room temperature. I meant to say cycle the temperature and then (after cooling) cycle the impact.

Robert Major · Jun 29, 2014

Hi No problem.
with the impact and some stuff i just don't trust using them. I hardly use one in my shop. have worked with many impact happy guys in shops, and then been the guy trying to get broken bolts out or clean threads up after they made the mess.
Personally on stuff like that manifold I like to "feel" whats moving or not as the case may be, With a socket or wrench I have total control over. The impact has no actual physical feel. just the change in note as it moves or the wiz as it snaps off.
Just my personal choice/ experience and if your happy with the impact method carry on as you like.
Regards Robert

Best Way To Remove These Exhaust Bolts

VTHokieAg

Member

robgIN

Member

ralph1111

Member

rustyfarmall

Well-known Member

Hendrik

Member

Robert Major

Well-known Member

JRSutton

Well-known Member

1130Leo

Member

1946 BN IHC

Member

Hendrik

Member

Robert Major

Well-known Member

Similar threads