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      04-18-2021, 05:12 AM   #1
cc4buy
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Oil leak around sump plug? 640 N55

Noticed oil platter around the sump plug when I took the cover off to replace downpipe today - check sump plug but on tight, any idea where the oil would be leaking from? Must be minimal as level hasn't dropped yet. 640i N55
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      04-18-2021, 06:44 AM   #2
Mnfamilyguy2020
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I'd start with the oil filter housing gasket(s). Super common area for oil leaks over time with the N55 engine. Do a quick google search, ton's of information out there about it.
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      04-19-2021, 11:49 AM   #3
CoffeeBean
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If it's on the drain plug, it's most likely running down from the oil pan(sump) gasket. Oil filter housing gasket would only drip onto the pulleys and serpentine belt on the front.
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      04-20-2021, 04:00 PM   #4
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Valve cover gaskets leak down back of the motor.
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