Question about 2007 BMW 320i E90
Engine oil found leaking
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Posted on Jan 02, 2017
SOURCE: oil leak from engine filter
The problem here is the switch inside the oil filter housing, or one of the lines attached to the bottom inboard side of the housing is clogged (oil return line). I just had this repaired. The oil could not return to the motor freely, so pressure was building up in the filter canister and leaking from the cover. The switch is called the oil pressure regulator switch, I believe. The filter depresses a little button at the bottom of the filter chamber. My oil filter was damaged apparently by the use of non-synthetic oil by the previous owner. Please have this addressed as this can lead to engine damage due to oil starvation.
Posted on May 05, 2009
SOURCE: High oil Consumption, BMW M5
Look for Castrol TWS 10W60 Motor Oil. This car should not burn so much oil, you need to use a different kind. It is recommended by BMW as well. I also heard the VANOS isnt an issue anymore, can be fixed with a different MAFF. Good luck!
Posted on Jan 18, 2009
the leak is most likely coming from either the differential cover gasket or the input flange that the drive shaft attaches to, this is called the pinion seal.
Posted on Apr 07, 2009
Try using an automotive dye in the oil the oil has to be going somewhere the dye should reveal the loose gasket or loose oil plug in which the leak may only occur at speed under pressure and not present when stopped
Posted on Aug 23, 2009
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