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Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 01-05-2016, 10:10 PM   #1
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BMW 330ci m54 CCV leaking?

Hey my car is leaking puddles of oil wherever I park and I'm trying to figure out what the problem is. My valve cover is leaking but it's not enough to create this much oil. There are puddles under where my CCV/ oil seperator is located. I have a pic of this oil hose and I don't know what it's called or where it goes to but it is damp with oil and leading to oil leaking under the intake manifold. Any help would be awesome thanks!
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Old 01-05-2016, 10:11 PM   #2
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The black oil line is located to the left of the oil filter housing. There are also puddles of oil on the intake side of the engine block if that helps.
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Old 01-05-2016, 10:48 PM   #3
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The picture you show is the vanos banjo bolt, but Im not sure if that would make a puddle. CCVs dont leak puddles. My very first guess with no info would be OFHG.
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Old 01-05-2016, 11:31 PM   #4
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There isn't any oil leaking from that I already checked. I asked my friend who is a mechanic and he said it's a good chance it could be the crankcase ventilation oil seperator.
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Old 01-06-2016, 08:41 AM   #5
Zero. Leaks.
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I think it would be from the oil filter housing gasket and the vanos line (worn washer where the banjo bolt is)

Only way to track down oil leaks is to degrease everything and inspect after a few drives for fresh oil.
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