New Lycoming cylinder

"Morgans" wrote:


Heat is NOT what seats the rings. Simple wear does it.

Keep your new cyl. cool or it'll glaze and you'll have to have it
re-hatched.

But what I read says pressure is what does it, and letting the engine get
too cool is very bad, too.

Yes, high pressure is required to force the rings against the cylinder walls.
That is why break-in is done at high power.

I've never read that too cool is a problem; I've read in several places that
too hot will glaze the cylinders.

--
Dan
T-182T at BFM