New turbo

If the old turbo pumped oil into the cac and on through the intake and that was never cleaned out, the oil is gonna be in there for a long time.
Just keep wiping the spots down with brake cleaner and shop rags. It will eventually stop seeping.

 

Wouldn’t hurt if you have $ and time. But I know of plenty of guys who didn’t and had no problems other then the oil seepage for a little while. If it’s not effecting the engine performance or intake temps I wouldn’t worry about it. Some of us folks believe in don’t replace it if its not hurting anything and save the $ for something more important.
You can always just disconnect the tubes and boots and clean those out real good and re install to stop the seepage.
The only time I’d say it is 100% good to replace cac is if the turbo sent shrapnel through it. Otherwise oil ain’t nothing.

 

When they blow, sometimes only a bit of oil gets pushed out, it can be seen inside the boot, and it stops before getting into the cac. Simply clean it off. If a lot of oil gets into the cac, it needs to be cleaned by a radiator shop, or replaced to be efficient.

 

My CAC got chock full of oil the last time I popped a turbo and the engine ran away. That was lots of fun, not. Especially cleaning that #### out of the CAC. I dumped the oil out of it and washed out with Mighty Boss degreaser and dawn dishwasher soap about a gazillion times. Then let it drain, dry out forever. But it was still blowing residual oil out of it up to about 1,000 miles of running but finally got it out. Took another 700 or 800 miles for the residual moisture/water to purge out of the air dryer.

You shouldn't have to pull your CAC off. Doesn't sound like you sent gallons of oil thru yours. Looks like a little residual. Like small package said maybe pull those hump boots and wipe them out clean but I probably wouldn't bother with that. I'd just run it until it's pushed it all out. Wipe it off every time you stop and eventually you won't have to wipe anymore once it's all out.

 

We always either replaced or sent them out to a rad shop to get flushed. Cooler pipes are easy enough to clean though.

 

Is your air filter clean?
Are you sure the turbo oil return line is not obstructed?

 

Or CCV module. Oil control in turbo is done thru machined radius and slingers, not seals. The sealing ring is for gas. Pressure differences must allow oil to drain. Idling long time without a pressure differential can also cause oil into compressor side.