[crAKer]

Got the heads off last night and found this lurking in # 3. I think this was the stuck engine culprit. So what say you Ladies and Gentlemen? Navel jelly? Lime Away gel? Steel wool? Or straight to the honing tool?

 

[DaveO430]

Hit it with some steel wool and see what it looks like and if there are pits in it. Looks like it has been using some oil.

 

[Bryanlj]

Itl run, use a bit of oil and might smoke a bit but still run

 

[AZgl1800]

I agree, just scuff the bore a bit, use some naval jelly if you want, and just run it like you stole it.

 

[pidjones]

That's nothing. And, I doubt it is serious enough to lock up an engine.

First, fill the gap between piston and cylinder with thick grease. Then, steel wool or my favorite - single-edge razor blade. Scrape away only the protruding rust, flush the grease out (along with the crud it collects). It will take more work and time to clean the gasket off of the heads. Install new stem seals while the head is off, and check/address any head or block deviation from perfectly flat. Make sure the manual is followed for torquing the heads - including cleaning and lubricating the studs and washers.