Possible Oil Leak near Turbo?

TLDR

• Investigating a possible oil leak near turbo

Details

So just as I was doing last minute checks for the DAR visit, I noticed a drip of oil near the bottom of the turbo oil sump.

I started to look where it’s from and I noticed the housing has oil traces through one or more crush washers. And the oil sump directly below it also has an oil drip; the source is unknown, but I suspect it migrated from the checkvalve housing leak on top.

I immeidiately sent an email to Sling’s maintenance department in Torrance and they got back to me with this:

I would recommend cleaning everything really well with some alcohol and a microfiber rag and perform another ground run, if you have not already. It could possibly be residual oil, which is not uncommon even on engines that have not had the check valve replaced. If it is still leaking, a qualified individual will have to investigate further.

So I cleaned up the area thoroughly as the first step. I will conduct more ground runs to confirm the residual oil theory.

Edit 11-09: I have gone through 2 complete heat cycles since I cleaned up the grease. So far this area is still clean. The oil might have been from previous work as Sling’s maintenance department said. I don’t think there is an active oil leak in this area. Case closed.