Thanks William. That’s an interesting article.
Sorry should have been clearer 
LPS2 is what’s recommended….
https://www.aopa.org/news-and-media/all-news/2019/march/pilot/savvy-aviator-powerplant-resurrection
I agree, there may or may not be a problem with the engine, If there is one, then and only then should you decide on how to fix it.
Otherwise, just make sure you don’t cause a new problem during the engine de-preservation. Advise to build up oil pressure before starting is very good, I would also use camguard, but I am not so sure about LPS3 at the end of the preservation.
Good luck with your medical!
Thanks everyone. I’ll Keep you updated on what happens.
Yes that is correct; the camshaft is lower down. But it still isn’t submerged in oil. It just gets a lot more splash during engine operation than the poorly lubed Lyco cam.
Yes, the cam on a Continental is under the crankshaft versus on top where nothing drips oil on it in storage. That’s the theory.
Doesn’t the Conti design have an advantage during periods of inactivity? Something about the location of the cams?
Oil was changed before and after storage.
That’s really smart.
Our over 2000 hour O200 was not run for over 2 years, not flown from 7/1/2017 until 29/6/2019. No problems have been seen so far. The cylinders had oil sprayed into them, but no plugs fitted, and it sat in a damp hangar. Oil was changed before and after storage.
It was ground run shortly before I flew it’s first flight since a wing recover and some re-glueing.
It’s on a G reg, so there is no chance of getting anything done in America.
A used part (which includes your own engine overhauled) needs an EASA-1 form, or a dual-release 8130-3. Some US engine shops can issue the latter. Pen Yan is one of a number. The US offers a lot of choice of highly reputable engine shops. The drawback is that you need to ship it there; see e.g. this.
the plane has been sat on the ground for 2 years.
There is a fair chance it is corroded but you may be lucky. It has happened. If you pull a cylinder you can inspect a part of the camshaft etc and that will give you an idea. But the oil filter and oil analysis will be informative too and that’s a lot easier.
Has the engine been run at all since standing around for 2 years?
I would borescope it via the spark plug holes (all cylinders) first. If you see rust, you know what needs to be done…
