Petrol engines aircooled Cylinder Head Damage
Burnt spark plug hole
CT 1600 heads, plug has obviously been loose and allowed combustion gases to start leaking up the side of the thread. Subseqently getting worse and burning the thread completely away..
Photos: By Squirrel
Loose/missing valve seat (2 litre a/c)
Seen, but not photographed. Vehicle driven back from Germany to UK, valve damaging seat area due to misalignment. One seat completely missing... vehicle made it back!