Air injection system?

[Justin B.]

That is freakin' bizzare!  Is it possible that the "solid" one has something stuffed in there that has kinda welded together with carbonm, heat, rust, etc?

[MrRiden]

Neat! I'm sure you have run across defective hardware in the past ie screws without threads or a slot machined in them. I just wonder if you have a fitting that was never drilled from the factory! Very odd indeed!
rich

[guitardad]

That is freakin' bizzare!  Is it possible that the "solid" one has something stuffed in there that has kinda welded together with carbonm, heat, rust, etc?

Yeah, I thought it was weird, too.  I scratched thru the thin coating of carbon, and sure enough, it's solid!

I was surprised how easily they came out, and how easily the exhaust nuts came off.  I used a propane torch to heat the nuts up a little, and they spun off with no binding or galling at all.  I used just enough heat until the intake side of the head felt barely warm to the touch.

[tagordon]

guitardad thanks for the post.

Very interesting, indeed.