After my car runs for awhile, it starts intermittently blowing smoke out of the exhaust, and from under the hood (near the turbo, but it's difficult to tell exactly where it's coming from). Problem disappears at speed (>40MPH or so), and doesn't really start until the car is warmed up.
I'm on my second engine. I had the turbo professionally rebuilt when the engine was out. In the current configuration, the oil drain tee's. One side of the tee goes to the oil pan drain plug (-10AN bung fitting in place of drain plug), the other goes to the front of the engine, but that outlet is slightly higher than the oil drain on the turbo.
I realize this isn't ideal and I'm looking at ways to route things so that gravity can actually do its job, but would a backup in the return lines cause oil smoke both from the turbo and through the exhaust?
Car runs fine - just obnoxious and embarrassing.
(Yet again on the 06 Solstice, 2.4L with aftermarket turbo. )
It's worth noting that this particular problem is why I (most recently) replaced the engine (cheaper than rebuilding). I'm getting the feeling that was not necessary.
I'm considering getting rid of the tee configuration and just going with a single line from the turbo to the oil pan, and installing a check valve in the line. I am not sure if this is a good or effective plan.