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Toasted cam options, rebuild or replace

ERJDriver said:
Aerosport said most likely due to disassembly, which JB did in Sebring.

They said the same thing as far as load and such on that surface
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I can see how that damage could happen if they tried to split the case with the engine on one of those vertical stands; something lycoming recommends against.
 
My friend had breakin problems with new cylinders on his "new to him" 360 (a different fiasco and long story). I pulled the cylinders and while in there found lifter spalling like yours. I just finished engine disassembly and all measurement work on Saturday. Crank on its way to ASI - deep scratch on a rod journal from the metal in the oil. Feel free to DM me for a call if you want some insight or guidance on the process.
 
lr172 said:
My friend had breakin problems with new cylinders on his "new to him" 360 (a different fiasco and long story). I pulled the cylinders and while in there found lifter spalling like yours. I just finished engine disassembly and all measurement work on Saturday. Crank on its way to ASI - deep scratch on a rod journal from the metal in the oil. Feel free to DM me for a call if you want some insight or guidance on the process.
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With the cam picture I see it is most definitely a candidate for for a major right now. End of discussion.
But hey my luck varies FIXIT
 
The slinger isn’t a fragile piece of material, I’d be surprised if a one off event during disassembly cracked it like that.
 
lr172 said:
My friend had breakin problems with new cylinders on his "new to him" 360 (a different fiasco and long story). I pulled the cylinders and while in there found lifter spalling like yours. I just finished engine disassembly and all measurement work on Saturday. Crank on its way to ASI - deep scratch on a rod journal from the metal in the oil. Feel free to DM me for a call if you want some insight or guidance on the process.
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She's at Aerosport, letting the pros handle it. May try to get up for the build class if i can. This frickin thing better be 15kts faster😂
 
The recent discussion on crank plugs has made me think, when hammering in a new plug or piercing an old one, all the hammer force is going through the aft face of the oil slinger, IE where the crack is on the OP’s crank.
 
lr172 said:
Another possibility is shipping damage. If something heavy puntured the shipping box in thast area, it would make sense, but there would be visible package damage. I built wood crates due to that exact fear when I shipped mine in.
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Crank was shipped by itself, I asked them that and they said it was packaged well in their opinion.

Still dealing with getting this thing back to me
 
ERJDriver said:
Crank was shipped by itself, I asked them that and they said it was packaged well in their opinion.

Still dealing with getting this thing back to me
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Feel for you. On the one I just did, we had to buy a new crank - Not cheap. ASI ended up rejecting it as it apparently was a CW crank and some idiot machined off the CW ears, leaving it weak at the point where they usually crack (#3 rod journal). Amazing what you find when you open these up.
 
lr172 said:
Feel for you. On the one I just did, we had to buy a new crank - Not cheap. ASI ended up rejecting it as it apparently was a CW crank and some idiot machined off the CW ears, leaving it weak at the point where they usually crack (#3 rod journal). Amazing what you find when you open these up.
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Yet they're still running. They failed everything, in the accessory case for spalling. Thing would've run for another 40 yrs i bet
 
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