Originally Posted by
Roy W
DMax,
I had reason to believe that the vacuum source for the OEM pcv system (turbo intake) was minimal. Prior to doing the pcv reroute I had "oil rings" around every intercooler hose connection. Following the re-route and an engine degreasing, after 30K miles, there is no evidence of even the slightest oil ring around the intercooler connections. That led me to the conclusion that there was oil vapor circulating under turbo pressure through the intake system, leading to air flow inefficiency and potential future problems with liquid oil settling out in the intercooler. With the pcv re-route, I somewhat expected to see evidence of oil vapor condensing and dripping from the breather hoses however that has never occured. This modification was all done as a procedural step in reducing oil consumption. Maybe the real problem is a slight oil seal leak in the turbo. Is the fact there is evidence of "oil creep" at the ERG block off plate telling me something ??