Does anyone have some tips for removing this rusted old exhaust manifold on my cummins?

 

Panther pis, aka PB Blaster. I soaked mine for 1 day. I took a combo wrench, put the bent side towards the engine for the top bolts, and a 2 foot pipe.

 

I use Kroil on mine. Then I'll tap generously, not beat, on the bolts with a hammer to put some shock through them to hopefully loosen up the rust and I'll use an air gun on all the bolts I can. Start gently letting the gun hammer then a little more, if it moves then I might go back and forth a little bit then they will come right out. The biggest problem is getting the socket to fit tight on rusted bolt heads.

 

Took mine off for the first time recently. I sprayed with PB Blaster on and off for a couple weeks first though. Came off no problem. Now looking for studs when I reinstall.

 

They arent as bad as they look. Id us a high quality (snap-on/mac) socket 1st. PB Blaster, heat, and vibration usually help things along nicely.

 

Thx for those good tips!