CactusPete

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

dieselJon

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.

JD730

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.

KRB

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.

JBradley500

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.

CactusPete

Thx for those good tips!