Reply To: 1930 Johnson V-45 Crank Bearings

[Buccaneer]

Bob Wight wrote:

Buc – if you have some, you might also try soaking the head studs with Evaporust.   On my FD-12 project, I found that seemed to work better than penetrating oils in finally breaking loose the bad corrosion and wicking down into the threads on my broken exhaust cover screws.

I thought about trying other substances around the studs.
I wonder if it’s “rust” on the steel studs, or aluminum corrosion
cementing the head on, and what would be the best snake oil
for the later? Caustic?

Hopefully none of the harsh chemicals would make it’s way
into the cylinder before I got the head off.
I have some phosphoric acid, which I could try around the center
studs, as the head is counterbored there and any fluid can’t escape.
Thanks.

Prepare to be boarded!