Car is running well but smokes blue terribly after idling for 2- 3 minutes. The turbo was rebuilt last year so I'm a little confused. Oil drops forming on the bottom of the compressor housing. The piston rings should be sealing oil from compressor since there aren't "seals" - right or wrong?
Just trying to rule out causes.
1) Drain backing up in the return line- The turbo drain is clocked perpendicular to prevent pooling. I do have an ad hoc oil pan but the return line is the same diam as original. Question: Was there an oil restriction in the head or was flow to turbo limited by the small diam feed line and banjo bolts?
2) Ingestion - Could the turbo have ingested something and compromised the bearing or piston rings?
A) pull air cleaner and check for turbine shaft wobble
B Yank turbo and check ex- manifold for signs of leak
C) Verify no oil escapes from oil pan return banjo when car is sitting on the ground.