Vacuum Oil Extraction




Interesting tidbit - the old blackberries float in salt water for exactly 178 seconds. You can ask an old boss of mine in Chicago on how I know this....
I use the Harbor Freight Extractor and didn't use a hose at all and just took the adapter that would connect to a tube and just put that at the top of the dipstick tube. Fantastic...sucked it all out! Thank you all!
This tells me that no matter how far I push in the extractor tube, it somehow is not getting to the bottom of the oil pan and, therefore, not extracting all the oil. Would you agree with that?
Now, in response to ItalianJoe1. I would not have thought that simply making a seal with the top of the dipstick tube would allow you to extract the oil. I'll have to give that a try.




I use the Harbor Freight Extractor and didn't use a hose at all and just took the adapter that would connect to a tube and just put that at the top of the dipstick tube. Fantastic...sucked it all out! Thank you all!
I use the Harbor Freight Extractor and didn't use a hose at all and just took the adapter that would connect to a tube and just put that at the top of the dipstick tube. Fantastic...sucked it all out! Thank you all!
Did you loosen the oil filter canister for the oil to flow down back in the sump?





When I change the oil on either MB (C320 or E350) my first step (after warming the oil a few minutes) is to loosen the oil filter cap. I let it drain completely (2-3 minutes), then remove the cap and filter second. Once done, I am sure its oil has drained into the sump. Only then do I install the extractor/topsider pump.
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On to my 2016 E350 4Matic M276.952. I needed to visually understand why the tube down the tube won't work. And it's for the reasons noted by the well-informed contributors above. The PDF depicts the design. I took the bottom metal pan down to understand it. The dipstick tube takes a 90º turn just before mounting to the upper oil pan. The plastic tip of the dipstick does not make that bend, but a plastic suction tube will. The oil level is above that bend and up the tube to be read by the dipstick. The next is a tight 90º bend to the bottom of the small metal lower oil pan - what I removed. Very difficult, if possible at all, for a plastic tube to make that bend. The indentation of the lower oil pan is maybe 3/8" - and it is equal to or below the drain plug. The drain plug is not in the metal lower oil pan. It's in the upper cast oil pan. The square chute(?) that is circled is the dedicated channel for the oil to be sucked up the dipstick tube via vacuum. In the case of a RWD 2016 E350 - the engine is still a M276.952. However, the oil pans are completely different (no axle) and the dipstick tube makes a slight bend, mounted to the upper oil pan and further leads right to the bottom of the metal lower oil pan.
I looked at various WIS instructions and I don't see where MB indicates when to insert the tube and when to vacuum seal - but maybe the best way is to use EPC and figure it out from the parts pictures and VIN the path of the dipstick tube. Like ItalianJoe1 says - all but a very few special ones.
Last edited by kjb55; Nov 10, 2022 at 06:22 PM. Reason: Attachment




Does 7.2 qrts sound right for my car?
Thanks,
Mark



