TwinTurbo.NET: Nissan 300ZX forum - But the explination given is
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Subject But the explination given is
     
Posted by 00Evan on February 10, 2006 at 2:56 PM
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In Reply To Perhaps the oil is leaking into the turbine side of the posted by 240Z FeO2 on February 10, 2006 at 02:50 PM
     
Message that the oil pressure inside the center cartridge is high (30-60psi) and then a loss of back pressure causes a pressure differential (high pressure in the cartridge, low pressure outside in the turbine) so oil leaks past the seal into the turbine where it is burnt. Now in a turbo there are two seals, one on the turbine side and one on the compressor side, both the same, why won't oil leak past the compressor seal when the compressor side sees vaccum thus greating a much much greater pressure difference between it and the oil pressure in the cartidge.

Doesn't make sense, whoever came up with the idea of less back pressure ruining your turbo seals wasn't thinking very hard I guess.

     
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