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  #1  
Old 11-13-2013, 03:24 AM
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Turbo oil return line pressure?

What pressure do you think the oil return line on the turbo reaches on the highway?

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  #2  
Old 11-13-2013, 04:13 AM
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Somewhere between oil pump pressure and crankcase pressure! Is this a test? Have you been playing with a pressure gauge?
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  #3  
Old 11-13-2013, 07:34 AM
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There should be no pressure at all. Any back pressure or "head" at all can cause the seals to leak oil into the intake or exhaust.
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  #4  
Old 11-13-2013, 01:09 PM
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The metal oil return line that was there stock was removed long before I owned he car and someone hose clamped rubber oil line to it. I'm wondering if on the highway it's spraying my turbo, intake manifold, and exhaust manifold from the increase in pressure. There's a layer of oil that builds up around there and comes back a few days later after I clean it off. Unless the turbo housing can crack and leak, it's the only thing I can think of.
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84 300sd 2.47 dif 360k
26 mpg needs lots of love
given to me in pitty

89 civic hatchback auto 140k
33mpgs soon to be low to mid 40's
been in the family since mile 1

85 300d with unknown knock. driven over 30k with knock and still going. sold for $800
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  #5  
Old 11-13-2013, 02:26 PM
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Sounds like a leak or they used radiator hose and the oil is weeping through it. Most agricultural or truck places will have oil rated hose for sale.
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  #6  
Old 11-13-2013, 02:46 PM
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Compare the ID of the supply pipe with the drain pipe. There's shouldn't be any worthwhile pressure in the drain pipe.

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