Mike, is this essentially the same thing as the "Ney Nozzle"?
- John
Is it possible that the rod nuts were installed backwards at first and then reversed?
http://www.lycoming.com/Portals/0/t...I 1458F (03-06-2012)/Connecting Rod Bolts.pdf
Is it possible that the rod nuts were installed backwards at first and then reversed?
http://www.lycoming.com/Portals/0/t...I 1458F (03-06-2012)/Connecting Rod Bolts.pdf
I didn't see it mentioned, but what was the verdict on the cylinders and LOP ops?
The crank is also Dynamically Spin Balanced. Counterweights Matched Weights.
This reduces, if not eliminates, those pesky leaks at the thru bolts and reduces the fretting of the cases. At assembly, the case halves get pulled together and the fit is at the dowels. An important item for the next overhauler to know! Since the case will not just fall apart when you remove the thru bolts.
Why is the yellow type around the lower part of the cylinders only?
While pulling off the exhaust, I noticed this warpiage located under the heat muff. Hidden for years. My muffs have never been off and I have had no reason to look under them. Hmmm. Whats that?
A quick call to Larry Vetterman... He has seen this before, although rarely. According to Larry, there are 2 cases where this is seen.
1. A wrapped exhaust, or ceramic coated exhaust. I have neither of these.
2. A muff exit blocked where the heat cant get away, either from a scat tube collapse or FW valve that does not dump overboard. Well I have never had either of those.
Either way, it is what it is. A tap with a punch to check wall thickness in the warpage area and Im satisfied that the warpage does not pose any risk so Im leaving it as is. Amazingly, the rest of the exhaust of completely great. I have never had a crack, support arm break, or anything of that nature in its years of service. Im cleaning it up and putting her back on.
Decided to fix this pipe. Fixing this pipe was not difficult. Im fortunate to have friends and resources on the field here. My star smart guy is Mr. Gary Dehart, retired crew chief Hendrix Motorsports. If he cant do it, it cant be done. We set up a jig on his welding table, cut out the offending piece, & fitted in a new one. The joints are not straight by design. With stainless, you also need very tight butt joints before committing rod to metal. Plus he is a perfectionists. I kept telling him we were not going to the moon here. But there is no convincing him that one day this exhaust might have to see duty on the space station or something. I love hanging out with Gary. I always am humbled and learn from the best. Thanks Gary for sharing your shop today.
Actually this is an incorrect statement. The reason for the dowels are to bring those holes back up to size, not to prevent leaks. Actually adding a second path around the bushing increases the likelihood of a leak since now there are two paths for the oil to travel. They don't do that to make them stop leaking there. The o-ring counterbore mod is done to prevent leaks.
On the 540 there is an oversize thru bolt available so its just as good to ream the holes to .002 undersize for the larger thru bolt, and then you can counterbore for the o-ring.
So unless one could not ream to fit to size for an oversize thrubolt, I would not do this mod.
Your airplane looks great! Do you know how many Super RV-8s are flying? Are there any plans or parts out there?
I am going to get the man himself JB to jump in and answer this question.
Kanuna, I'm very interested in your oil cooler mount, seen in this picture. It's hard to see much in the way of details. Where did you get this? Is it fiberglass? Did you make it yourself?
Any comments or further information, especially after all of your experience with it? Much appreciated, thanks.
kahuna, that is one nice xmas present. happy new year and many safe flying hours. great education on engines. do you have a final tally on the entire project? has it gone upside down yet?
Hi Kahuna, Did I miss it? Was looking for what your mechanic thought about all the LOP hours
Ill get him on this. He has been recovering from a holiday of fishing with his boys. Thanks for reminding me.
Yes I have talked to him and he has expressed that he is not a LOP fan. Getting him to come here to discuss it has been difficult.
...the timing needs to be adjusted a bit. The bad news it that in order to do this, it's a complete prop pull...