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Subject I spoke with a 2nd turbo expert. The oil is pressure fed,
     
Posted by evan_aggie on August 28, 2012 at 10:27 AM
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In Reply To It came from the oil pan residue. Oil was mostly drained posted by ZinnZ32 on August 27, 2012 at 10:29 PM
     
Message gravity drained. If oil is allowed to (by turning the engine upside down) make it's way against the air seal of the compressor wheel or turbine wheel, it'll seep past the gap and show up in your compressor housing (or exhaust housing).

That should put the matter to rest. That does make me wonder how one typically gets an oil leak aside from a drain blockage. I believe he also said that a bad bearing and shaft play would make the problem worse.

     
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