Any Value in Old Cylinders These Days?

[N49ex]

If they are at TBO, but still working, there is a market for them with the airboat guys in the Everglades. I sold a set that way with eBay.

Reinhard

[Pdtofly]

When I had some engine work done at Ly-Con years ago, they took some old engine parts, including some old cylinders in on trade. If you need something, they might work a deal.

Give them a call. It never hurts to ask.

Brian

[mahlon_r]

On parallel valve cylinders, whose heads are fairly prone to cracking, I would go with new cylinders at overhaul. But I would certainly repair one midlife, if the head wasn't cracked. On slant valve 360 cylinders, which were not very prone to head cracking, I would overhaul them in lieu of new at overhaul, if it was saving me money. New seats, valves, guides and bore over to p.010 and you are good to go for another life on that series, as far as I am concerned.
Good Luck,
Mahlon

[kiljoy]

When our cylinders crack we make flower pots out of them.

[jbDC9]

Originally Posted by mahlon_r

On parallel valve cylinders, whose heads are fairly prone to cracking, I would go with new cylinders at overhaul. But I would certainly repair one midlife, if the head wasn't cracked. On slant valve 360 cylinders, which were not very prone to head cracking, I would overhaul them in lieu of new at overhaul, if it was saving me money. New seats, valves, guides and bore over to p.010 and you are good to go for another life on that series, as far as I am concerned.
Good Luck,
Mahlon

This gets me thinking the current cylinders on my O-360-A1D... the engine was a Lycoming factory rebuild in 1996 with new cylinders; I bought the engine in 2005 with 1660 hours, did a field overhaul and had the jugs overhauled by ECI for another run. Now I'm again at 1660 hours on my 2005 overhaul and in a similar situation Paul was in a few years ago; the cylinders are aging and oil consumption has crept up. Compressions are decent but getting some leakage around the exhaust valves.

The el-cheapo part of my brain says "They're still good! Send 'em to Gibson for overhaul!"... but then I think about the fact that they now have 3300 hours on them and would be looking at a 3rd run on this set of cylinders. That sorta tempers my cheapo temptations and maybe go with a whole new set from Lyc or Superior.

But on the upside, I'd have 4 cool new flower planters for my wife, sweet!!

[emsvitil]

How much overbore can you do on cylinders?

[rag]

Make torque plates out of them.

[RV6_flyer]

Originally Posted by emsvitil

How much overbore can you do on cylinders?

The two aftermarket makers of EXPERIMENTAL pistons that I know about, Combustion Technologies and NSF Pistons, both make P10 (0.010") oversized pistons.

Do not know of many people that go with the oversized pistons or of any other larger oversized pistons available for our engines.

[rv8ch]

Originally Posted by RV6_flyer

The two aftermarket makers of EXPERIMENTAL pistons that I know about, Combustion Technologies and NSF Pistons, both make P10 (0.010") oversized pistons.

Do not know of many people that go with the oversized pistons or of any other larger oversized pistons available for our engines.

Interesting - any idea why this is? I used to overhaul motorcycle engines as a teen, and this was our bread and butter. Worked great, but perhaps these old two stroke engines were just designed this way.

BTW, I enjoyed the 12 minute video on the Combustion Technologies website showing how they make the pistons.

[RV6_flyer]

Originally Posted by rv8ch

Interesting - any idea why this is? I used to overhaul motorcycle engines as a teen, and this was our bread and butter. Worked great, but perhaps these old two stroke engines were just designed this way.

See Mahlon_R's post #13 above.