My Wooden Airplane
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Cylinder Head Cleaning, Part Two

After cleaning the cylinder heads, I noticed some strange marks inside the combustion chambers. What's weird is that these marks are on two separate sets of heads, from two different engines. I'll have to ask around to see if anyone knows what might have caused this, and if these heads are worth the effort of rebuilding.

These two pictures are from a 1965 (95 HP) engine.

This one is from a 1967 (110 HP) engine.
These heads also have some heavy pitting, possibly from corrosion?

Total Time: 1.0 hrs.