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turbo oil supply check valve operation
Was hoping someone could describe how the simple ball / check valve in the oil supply line to the turbo works? I understand the ball floats and with pressure under it, it lift up against the lower side of the special banjo with slots in it so oil bypasses. Now with the engine off, how does the ball stop oil running to the turbo? does it just sit on the seat with gravity?
If the oil in the tank is at a higher level than the ball, will the head of oil not just push the ball off the lower seat?
Just trying to figure out how it works and what it was designed to do. I know many report of oil continuing to flow through the turbo with the engine off without the ball installed.
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1988 930: 3.5L 100mm LN slipins, LN FFA rods, Supertec studs, GT3582R with T4 1.07A/R twin scroll housing, RarlyL8 equal length divided headers, dual Tial MVS 38mm WG's, Carrera 3.2 heads with 993 big valves. 964 Cams, full bay IC, KEP st1 clutch. PE3 sequential ECU with 750cc EV14 injectors, CoP twin plugs, J&S Safegaurd, Aquamist HSF3 water inj. Wavetrac LSD.
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