Quote:
Originally Posted by Doktor Bert
2.0mm = .078" more or less.
I would prefer to see .060" in most cases. Larger restrictions can lead to oil migration through the turbo's sealing rings...
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This is new to Me. Where I worked We always replaced damaged Stock Parts with other Stock Parts.
Maybe there needs to be some reverse engineering.
What is the actual size of the restriction in the Stock Turbocharger Oil Line and where is it located?
There needs to be a balance. Too much Oil won't drain out of the Bearing Housing fast enough and cause the leaks you spoke of.
While reducing the size of the orifice a little might not harm the Bearing it is the Oil that cools the Bearing Housing.
Not enough Oil might cause coking/Carbon Build-up on the Exhaust side of the Turbo.
I suppose also if the Orifice is too big it could have an effect on the Idle Oil Pressure.