View Full Version : Repairing busted off cooling fins on cylinder jugs & heads

03-14-2016, 10:41 AM
Any of you guys ever attempt to weld up broken off cast iron fins on your
old iron? I have an OEM pan cylinder jug that looks like crap since the broken off
fin is in a real obvious spot & really stands out.
I would really like to have this repaired, But I have heard that welding cast iron
is extremely difficult or impossible. Also the broken fin piece is gone which sucks
even more.

I have seen aluminum heads that had fin repair & some of them looked excellent.
But what about cast iron...... ?

03-14-2016, 2:47 PM
braze it up and re-shape.
i have also seen cardboard taped to the bottom of the fin and then j-b weld piled on to the right thickness.after it was shaped and dressed and painted black you couldn't tell it.