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      02-22-2024, 02:22 PM   #2
Brian86
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Drives: e36 M3, e91 325xi, N50 Xterra
Join Date: Dec 2020
Location: Pittsburgh

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It's the oil separator, CCV system.

Change it *NOW*.

It sounds like the check valve in the drain is stuck open, so it's suddenly started sucking oil into the intake like soda up a straw.

It'll foul your cats if you keep driving it, perhaps even hydrolock the thing if you're incredibly unlucky.
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