Piston Ring End Gap

Discussion of the Aerovee kit engine.

Piston Ring End Gap

Postby XenosPilot » Sat Oct 22, 2016 6:18 pm

I just honed the cylinders on my Aerovee with 42 hours on it. It had low compression numbers on the rear cylinders during the annual inspection, so I took it apart to inspect. Most of it was certainly in the valves, which I lapped, but there were also vertical scratches on the cylinder walls. FYI, the engine sat for 3 years without running. Now to the point...When I checked the ring end gaps after honing, the top compression ring was between 0.012" and 0.022" like it should be. I then measured a few of the 2nd compression rings and found them to be about 0.006".

My question is, what do I do to resolve this? Do I order different rings? Do I just file the rings until the gap is okay? Has anyone dealt with this before?

Thanks,

Stephen Layton
Stephen Layton
Xenos, Aerovee, Aeroinjector, 100LL, MGL Enigma panel
Prefer motorless flying...soaring!
Hobbs, NM
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Re: Piston Ring End Gap

Postby Bryan Cotton » Sat Oct 22, 2016 8:50 pm

Stephen,
That is our next step. On other engines I filed the rings to make the end gap requirements.
Bryan Cotton
Poplar Grove, IL C77
Waiex 191 N191YX
Taildragger, Aerovee, acro ailerons
dual sticks with sport trainer controls
Prebuilt spars and machined angle kit
Year 2 flying and approaching 200 hours December 23
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Re: Piston Ring End Gap

Postby XenosPilot » Mon Oct 24, 2016 10:17 am

I had never done this before, but I was able to use a file and get the rings to spec. yesterday in just a few minutes each. Thanks for the reply!
Stephen Layton
Xenos, Aerovee, Aeroinjector, 100LL, MGL Enigma panel
Prefer motorless flying...soaring!
Hobbs, NM
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Posts: 9
Joined: Thu Jun 16, 2016 4:41 pm


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