I'm in the beginning stages of transplanting a donor engine into my frame. The replacement engine has what I gather are called spigots on the exhaust ports based on some of the discussions here.They are short protruding tubes, flanged metal collars with flat head screws into the head. My exhaust uses the standard finned collars, keepers and studs with nuts.
Anticipating they might be difficult I sprayed them with Kroil last night and intended to drive them out with my impact driver this afternoon. The first broke free fine. The second won't budge. I tried some heat, but I can't get it out. Not sure how much heat I can put to the head. I stopped at this point.
I'm also wondering whether I'm going to have to drill out and EZ out this screw or worse several of them.
Has someone come up with a method to simplify this?
