211º Posted July 22, 2022 Report Share Posted July 22, 2022 It appears that I have some blow-by in one of my cylinders. My annual is coming up in October. In past annuals, I've been grounded for (to me) what seems like a long time. Anyway, a week or so ago, I ordered two cylinders for my engine - just in case one (or two) need replaced. And so that I can "whip them out" when needed. Although the supplier's site says that they're available now (as opposed to other items that show back order), they're now scheduled to be shipped to me around 8/15. From talking to their representative, these were reportedly order by them in April 2021. So, two things: 1. Yikes on material orders (no news there) 2. If I need only 1 cylinder, I may have an extra for someone with an A1A with dire need. Quote Link to comment Share on other sites More sharing options...
0TreeLemur Posted July 22, 2022 Report Share Posted July 22, 2022 Curious how you diagnosed that you need a new cylinder? Compression test? Did you scope the valves? 1 Quote Link to comment Share on other sites More sharing options...
MikeOH Posted July 23, 2022 Report Share Posted July 23, 2022 3 hours ago, 0TreeLemur said: Curious how you diagnosed that you need a new cylinder? Compression test? Did you scope the valves? I don't know that he did. He's rather prudently, IMHO, especially in these lousy supply times, covering his backside rather well. Given the market these days, "investing" in a couple of spare cylinders sounds pretty smart! 1 Quote Link to comment Share on other sites More sharing options...
Marauder Posted July 23, 2022 Report Share Posted July 23, 2022 I don't know that he did. He's rather prudently, IMHO, especially in these lousy supply times, covering his backside rather well. Given the market these days, "investing" in a couple of spare cylinders sounds pretty smart!He must have been a Boy Scout like me.I think it was a smart move to get them on order. I have a first run cylinder from my plane that was replaced with a new Lycoming cylinder in 2019. I might have it overhauled and stored just in case.Sent from my iPad using Tapatalk Pro 2 1 Quote Link to comment Share on other sites More sharing options...
211º Posted July 23, 2022 Author Report Share Posted July 23, 2022 16 hours ago, 0TreeLemur said: Curious how you diagnosed that you need a new cylinder? Compression test? Did you scope the valves? I'd like to provide some brilliant engineering analysis... but it was 1 part low-compression prop pull through, 1 part dirty oil after 5 hours blow by, 1 part gut, 1 part I don't want to be grounded for 2 months, 1 part I've vowed away from Southwest for 2 more months after they tricked me with another MDW midnight delay, and 1 part odds are quite good that I'll be able to find a buyer at the price I paid if I don't use or need them this year. 3 Quote Link to comment Share on other sites More sharing options...
Ragsf15e Posted July 23, 2022 Report Share Posted July 23, 2022 3 hours ago, 211º said: I'd like to provide some brilliant engineering analysis... but it was 1 part low-compression prop pull through, 1 part dirty oil after 5 hours blow by, 1 part gut, 1 part I don't want to be grounded for 2 months, 1 part I've vowed away from Southwest for 2 more months after they tricked me with another MDW midnight delay, and 1 part odds are quite good that I'll be able to find a buyer at the price I paid if I don't use or need them this year. I don’t fault you for buying the cylinder, but just proceed cautiously replacing one because of blowby. That’s not usually a fatal flaw if the rings are serviceable and it’s making power. Often they’ll still make compression as they are “sealed” oil against the walls. If compression is bad look carefully at the valves. This is just my experience and it could certainly be some sort of terminal cylinder problem. Just go slow even though you’ve got a cylinder ready because you could induce a mif. 3 Quote Link to comment Share on other sites More sharing options...
PT20J Posted July 24, 2022 Report Share Posted July 24, 2022 If it's just a ring issue, maybe all you need is honing and new rings. 2 Quote Link to comment Share on other sites More sharing options...
JonD Posted August 19, 2022 Report Share Posted August 19, 2022 Do you still have one of these cylinders? I just put in an order for one for my io-360-a1a and i may still be able to cancel it if you have one. currently 14 week lead time. Quote Link to comment Share on other sites More sharing options...
Bunti Posted August 19, 2022 Report Share Posted August 19, 2022 Make sure to confirm that the IO 360 A1A cylinders are narrow or wide deck. The Mooney is approved with a wide deck version or the narrow deck version of the engine. But you cannot use narrow deck cylinders on wide deck or wide deck cylinders on narrow deck. Quote Link to comment Share on other sites More sharing options...
M20F Posted August 19, 2022 Report Share Posted August 19, 2022 27 minutes ago, JonD said: Do you still have one of these cylinders? I just put in an order for one for my io-360-a1a and i may still be able to cancel it if you have one. currently 14 week lead time. Be sure to clarify wide deck versus narrow deck The engine can be either way Quote Link to comment Share on other sites More sharing options...
JonD Posted August 19, 2022 Report Share Posted August 19, 2022 Do you still have one of these cylinders? I just put in an order for one for my io-360-a1a and i may still be able to cancel it if you have one. currently 14 week lead time. Update: WIDE DECK! 1 Quote Link to comment Share on other sites More sharing options...
SLOWR426 Posted August 20, 2022 Report Share Posted August 20, 2022 What is wide-deck and how can I tell? Quote Link to comment Share on other sites More sharing options...
A64Pilot Posted August 20, 2022 Report Share Posted August 20, 2022 If you end up keeping one for a significant time, be sure to pickle the thing. ‘I like Par-Al-Ketone AKA Black Bear, it’s a cosmoline type of grease that washes off with just about any kind of petroleum solvent. https://www.univair.com/accessories-supplies/view-all/black-bear-par-al-ketone-1-quart/?gclid=Cj0KCQjwjIKYBhC6ARIsAGEds-LlFhwhJ9783BdEzzpykWTjtvDIhF90hA6r2cnQ--C-hiDnZHBGEbMaAjJjEALw_wcB This seems way too cheap, AC Spruce wants $80 a quart and prices are all over the place so shop around. it dries to a sort of grease like wax, goes on with a consistency of thin grease, put it on any part that could rust, then wrap with wax paper and it will stay good, longer than I’ll live. I saw one guy a few years ago during the great Crankshaft AD who bought his at a discount but kept running the engine until he had to change it, when he unwrapped his crank it was rusted bad enough so that it was un-serviceable. 1 Quote Link to comment Share on other sites More sharing options...
A64Pilot Posted August 20, 2022 Report Share Posted August 20, 2022 3 minutes ago, SLOWR426 said: What is wide-deck and how can I tell? Best to give an article explaining https://generalaviationnews.com/2009/10/07/ask-paul-wide-deck-vs-narrow-deck-engines/ 2 1 Quote Link to comment Share on other sites More sharing options...
Jeph357 Posted August 20, 2022 Report Share Posted August 20, 2022 2 1 Quote Link to comment Share on other sites More sharing options...
211º Posted August 23, 2022 Author Report Share Posted August 23, 2022 Do you still have one of these cylinders? I just put in an order for one for my io-360-a1a and i may still be able to cancel it if you have one. currently 14 week lead time. Update: WIDE DECK! JonD and I have been DMing. The cylinders were supposed to arrive to the reseller on 8/15. But nothing has hit my Amex yet, so I need to call for another update. Quote Link to comment Share on other sites More sharing options...
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