Stuck exhaust valve

[N2625U]

I've got the ECI NiCad cylinders on a Connie O300C. I flew to Kansas from New Hampshire a few weeks ago and had 2 exhaust valves stick open after the plane had sat for a few days. Found an old A/P that spent an hour teaching me how to take care of it via the rope trick. He did one with me watching & then watched me do the other one. It was a fun time for me. Just curious as where would be a good place to get an exhaust valve reamer? I forgot to ask him where he got his but I imagine he has had it since WW II. I learned so much in that hour and a half.

[ron74887]

any machinist supply store. Just take your time reaming it out -pull vale out of the spark oplug hole and steel wool it clean also.
REX supply here in LA.
Ron

[Bruce Fenstermacher]

Likely the valves stuck when you shut down the engine and it cooled. Sitting a few days had nothing to do with it. It was just a few days till you discovered they had stuck.

[N2625U]

Yes, it took cooling down for them to stick. I'm a little nervous about using steel wool to clean the stems. Wouldn't something like scotch brite work better? Just thinking of what steel wool would do to the stem.

[Bruce Fenstermacher]

Steel wool will not touch those stems. They are much to hard. I use a razor blade and scotch brite.

[GAHorn]

Allow your engine to idle for a minute or two around 800 rpm before shutting down to allow the valves/guides to equalize and you will likely avoid this problem.