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And, now for the "rest of the story"..
It wasn't just rust there was carbon on the pistons that had lifted off and when I turned the engine upside-down on the stand and it stuck to the wall so the piston was trying to break up the carbon.
Where's the bs flag??
Why would I lie, you think it isn't embarrassing to admit that it was something stupid and all I had to do was work the crank through it and that I pulled the engine and cylinder head for nothing? I told you what the fix was, move on.
I didn't even think about it until a few days later that I only had to clean off 3 pistons tops of flaking carbon and that is what could have been stuck to the wall on the rear piston; I didn't examine it, I just saw the piston get stuck to it while turning it over with the head off so I got rid of it. I didn't know I would be under cross examination later.