by DBrown » Sat May 20, 2023 8:29 am
Even certified engines have allowable crack limits. pretty much all Continentals allow for 2" or less case cracks in non critical locations, see SB M90-17. If it's in a non stress area and not near an oil passage then the worst thing that can happen is a small oil weep. In my experience all Aerovees weep somewhere, most leak from several places
The case isn't going to just come apart if its cracked in a non stress area.
Now..... I would keep a very close eye on it. If it's growing between annuals or anywhere near an oil passage, I'm pulling it!
I personally wouldn't do JB weld, the amount of oil that weeps is insignificant if your case is vented properly and you are covering it up so you can't keep track of any growth that occurs.
IMO
ATP, CFII, MEI, A&P, IA
Onex N161X