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THe only way you can have any significant vacume on the inlet of the turbo is with a seriously restricted air filter. The ventilation of the engine is through the top of the valve cover which goes to the oil seperator.
If that is restricted for any reason the blowby pressure that builds up will try to find any other way it can to escape...be it the dipstick to spewing oil....or the oil seperator drain. Or the main seals.....in my case it was partially activating the IP shutoff causing me to lose power on the highway.....
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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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