Rusted elbow bolts

TickledPink

I'm replacing the exhaust manifolds, risers, elbows etc. on my 5.0L MPI and am stuck before I start. The elbow bolts on the top are all rusted shut and only one will turn.
Any tips for loosening them would be very much appreciated. 
Thanks very much.

aero3113

Are you just using a wrench or ratchet? Try using an impact gun. You need the shock to loosen up the bolt. My impact gun is my favorite tool. It helped me tremendously with my FJ40 when I was pulling it apart. You have a good chance of snapping the bolt if you don’t use one.

TickledPink

Thanks @aero3113 I shall invest on one.

aero3113

Harbor freight has some reasonable ones that work really well, compact also. I have their Bauer impact gun.

PickleRick

Find your favorite penetrating fluid and let it soak a few days.  

Start the boat up and let it get to normal running temp, or as close as possible.  

Try to pop them while warm. 

Good luck....always a slim chance of breaking the the head off the bolt

Rich_

Kano AeroKroil
Amazon https://a.co/d/07bOSwC7 and now even at some auto parts stores

aero3113

Aerokroil is great stuff.

raybo3

@aero3113 yeah its great stuff because your name is in it.......LOL

aero3113

😂