ORIGINAL: Flyboy Dave
You folks have the terminology wrong. Glazing is a build up on the cylinder wall
from running too rich in a blow-by situation. Cylinder scuffing (damage) is the
result of running too lean and overheating the ring. Scuffing is not easy to do
with the amount of oil we have in the fuel.
ORIGINAL: Sport_Pilot
Glazed cylinders are caused by heat and small worn bits of metal plugging the
valleys between high points.
What Planet was that on ?
Glazing is
not caused by heat. It is cause mainly by the failure of the
ring to seat. If the ring was seated, and the engine was running at a proper
temperature....there would be no glazing. Glazing occurs where the ring is not
seating....and where the ring is not seating there is blow-by. The accumulation
of fuel and oil getting past the ring builds up on the cylinder wall.
Running an engine lean, overheating it to the point that the oil breaks down,
allowing the ring to scuff on, and damage the cylinder wall will result in a loss
of seal to the cylinder wall, and a loss of compression. This will result in blow-by
which will in turn manifest itself....ultimately.... as glazing on the cylinder wall.
Normally an engine that experiences this catastrophe dies anyway from lack of
compression., and probably will not run. If it does run, it will bring you back to
point you started at....that being an engine that won't idle properly....due to
low compression and cylinder glazing, and an engine that is lacking satisfactory
performance for obvious reasons.
FBD.
