Is there vacuum in the oil pan of an e30. Like I have a small crack in my oil pan and was wondering if that is a problem. Like it's high enough we're oil doesn't ever come out. Just curious. Thanks!
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Vacuum in oil pan?
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its vented to the intake between the throttle butterfly and AFM so there is a teeny tiny bit of vacuum. its not on the vacuum side of the butterfly.
if its a hole then crap can get in from the outside even if oil doesnt come out89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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Yeah, the crankcase vent is between the AFM and the throttle body, not to atmosphere. The whole crankcase is under vacuum. If you pull the dipstick while the engine's running (and you don't have a huge vacuum leak) it'll noticeably affect the idle.Last edited by cscracker; 07-22-2018, 06:21 AM.
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Pulling the dipstick is NOT a vacuum leak it's unmetered air. It's not a vacuum leak because it's not on the vacuum side of the throttle butterfly89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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Unmetered air is a vacuum leak. All air that gets in but is not measured by the AFM (or MAF/MAP sensor on newer cars) constitutes a vacuum leak (or air leak, technically vacuum can't leak, but it's common parlance). There is no difference whether it's before or after the throttle body, it will cause lean running conditions either way.
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Originally posted by digger View PostPulling the dipstick is NOT a vacuum leak it's unmetered air. It's not a vacuum leak because it's not on the vacuum side of the throttle butterflyLast edited by zaq123; 07-22-2018, 07:09 PM.
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I personally don't think there is a benefit except environmental reasons. There just isn't enough vacuum to improve performance89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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