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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Oil on Boost(?) sensor after new turbos
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<blockquote data-quote="Old-Raptor-guy" data-source="post: 2021295" data-attributes="member: 52062"><p>The oil in those spots is normal. Let me elaborate. </p><p></p><p>The PCV system has to "vent" crankcase vapors into the intake system to be burned.</p><p></p><p>On an turbo engine, under boost the entire intake system post turbo is under pressure. You do not want that pressure going into the crank case. </p><p></p><p>So there is an valve that closes under boost to prevent boost from going into the crankcase AND allows crankcase pressure to go to the ONLY low pressure (vacuum/suction) source left and that is the turbo inlet. The crankcase vapors will cool off and condense back into a liquid.</p><p></p><p>This is why I went with a catch can that is connected to both valve covers.</p></blockquote><p></p>
[QUOTE="Old-Raptor-guy, post: 2021295, member: 52062"] The oil in those spots is normal. Let me elaborate. The PCV system has to "vent" crankcase vapors into the intake system to be burned. On an turbo engine, under boost the entire intake system post turbo is under pressure. You do not want that pressure going into the crank case. So there is an valve that closes under boost to prevent boost from going into the crankcase AND allows crankcase pressure to go to the ONLY low pressure (vacuum/suction) source left and that is the turbo inlet. The crankcase vapors will cool off and condense back into a liquid. This is why I went with a catch can that is connected to both valve covers. [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Oil on Boost(?) sensor after new turbos
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