Quote:
Originally Posted by rickjordan
My thinking, which could be wrong, is that if excessive oil was going down that breather hose, that it would then get kicked up into the intake pipe leading up towards the egr valve and beyond. However, that pipe coming off the turbo is spotless up to the EGR valve.
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We need to define the term "spotless".
I'll define it as "not a trace of moisture due to oil............no oil film on the inside surface of the tube............perfectly clean".
If it's truly "spotless", then I'm confounded as to your issue. But, I don't believe it's "spotless". I believe there is oil on the surfaces prior to the EGR valve.............but, it's a film of oil that clings to the surfaces. Once the oil gets to the valve, the input of exhaust combines with the oil to produce a sludge like material that builds up in the intake tract over time. If plain oil is introduced to the tract, it simply moves with the airstream and is burned in the combustion chambers.
There is almost no possibility of the oil originating from the exhaust stream and entering the intake tract via the EGR valve, and, hence the perfectly dry valve face.