3 Attachment(s)
cylinder head question - Never saw this before
So I was removing cylinder head from spare engine and Did not notice this until I got it off. 3 of the 4 spark plug holes have some kind of adapter in them. I do not see how this works as the electrode would not even stick through the head. I can only suspect these were an attempt to fix a stripped hole, but hard to believe 3 of 4 were stripped. If they did 3, why not just do the 4th one for consistency.
Has anyone seen this and explain? does this even work? Pics attached.
Attachment 9936
Attachment 9937
Attachment 9938