Sorry gents, I am still having an issue here. For history see my thread COV WTF here.....
http://listerengine.com/smf/index.php?topic=7294.0The main plug as installed in the head is a different concave shape than that used with a standard COV or a blanking plug as used in 8/1s and Listeroids.
I have a replacement main plug of the proper shape, but am unable to remove the old one.
Tried the "drive in a hardwood plug, reinstall the COV with the handwheel screwed out a bit, the main plug will be ejected by the force of compression"
That method proved unsuccessful
Also reluctantly tried the alternative to be used if the hardwood plug method was unsuccessful: "Tap the hole in the main plug and use a bolt to draw it out"
Insufficient thread caused the bolt to pull out. Tried with larger bolt, same result. Drilled and tapped larger still (1/2" bolt) ....that should do it.....
Also unsuccessful.
So I think to return to a version of the hardwood plug method........ reinstalled the 1/2" bolt, screw in the blanking plug, try to START the engine.......lots more compression pressure when the engine actually fires off, I am thinking.
Started the engine, let it fire a few times, but the #%$@+%! main plug is still in there fast, and now must be replaced because I have drilled out and threaded it!
As you know, I am in a remote area with limited resources. This probably needs to be machined out, but my machine shop consists of a selection of hammers and files.
Now what? anyone care to recommend an different approach? Will I have to pull the head and get the plug machined out as a last resort?
As usual, all suggestions welcomed.
Cheers,
Hugh