|
|
|
#1
|
|||
|
|||
oil extraction by vacuum - what container do you use?
hi folks, i put a couple of hose barbs into a 2 gallon paint bucket with the intention of using my mityvac to extract the engine oil from the dipstick tube. turned out that there was some air leak in the bucket and i couldn't make enough vacuum to get more than a few drops of oil out. what kind of container do you all use for the job, and did you use screw-tight bulkhead fittings or were rubber grommets around the barb fittings sufficient?
(edit: i'm confused because i can't find the air leak, so interested in starting over with a container that is known to work.)
__________________
'77 240D, 504H, OM617.952, etc. Last edited by bricktron; 09-05-2015 at 03:04 PM. |
#2
|
|||
|
|||
I have a commercial unit. I use it on aircraft, tractors, transmissions, hydraulic tanks, car engines, generators, etc. It uses a compressed air driven venturi system to drop the pressure in the tank. Works pretty well on most applications, but not so well on MB diesels - don't know why. It's not the oil - it sucks out Yanmars, Detroits and Cummins just fine. It prefers warm oil (+100F) & lighter weights (think ATF). It doesn't like diff fluid - too thick. It uses threaded fittings & sealed quick disconnects on the suction side.
|
#3
|
||||
|
||||
My extractor was from an online store, don't remember which. It holds about 10 quarts.
Regardless of the container, I don't think a Mityvac will pull enough vacuum volume to suck the oil out of an engine. You need a much larger pump. I've even considered connecting an electric vacuum pump to the oil sucker to make the job easier.
__________________
"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#4
|
|||
|
|||
You might need something like this: Paint Pressure Tank - 2-1/2 Gallon
My car has around 7 gallons of oil. Maybe a 10 gallon metal drum with bungs on them will also do the job. Like they said, the mityvac will not be enough.
__________________
'85 300D Cal 280,000 miles '14 GLK 350 60000 miles |
#5
|
|||
|
|||
Your 1985 300D holds 8 QUARTS of oil.
|
#6
|
||||
|
||||
Quote:
__________________
Graham 85 300D,72 350SL, 98 E320, Outback 2.5 |
#7
|
||||
|
||||
I use an elec vacuum pump and a five gallon helium balloon tank and 3/4 inch vinyl tubing with 1/8 inch walls hose clamped onto dipstick tube. Mityvac hand pump will definitely work. It will take a lot of pumping though. You can find out how much by evacuating the tank down to 25 inches of Hg and count how many strokes it takes.
__________________
85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#8
|
|||
|
|||
thanks funola for describing the hardware. how did you get the figure 25 inches, is that the height of the oil circulatory system?
i don't mind it being a lot of pumping as this isn't something that happens often. if it becomes intolerable i will buy an electric pump.
__________________
'77 240D, 504H, OM617.952, etc. |
#9
|
||||
|
||||
You could connect the engine vacuum pump to the container, and suck the container into a vacuum, then close a shutoff valve to contain the vacuum, then shut off the engine, and connect the container to the dipstick tube and suck it out.
But a plastic 5 gallon container will not hold much vacuum before it implodes. You are going to need a steel drum like the helium tank, or similar, or a steel round gas can. 25" of vacuum is a LOT of atmosphere to hold back...
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#10
|
|||
|
|||
vstech, i will keep an eye out for a steel tank. using the engine to pump out its own oil is brilliant.
funola, rather surprised to hear that your hose was "clamped onto dipstick tube". this sounds a lot less messy than dipping it in, thanks for the tip. 25 in hg is the max vacuum my mityvac is rated for, btw. each squeeze moves 1 cubic inch of air. a 2 gallon bucket is 462 cubic inches. now i have no idea what the pressure would be if i squeezed the trigger 462 times.
__________________
'77 240D, 504H, OM617.952, etc. |
#11
|
|||
|
|||
Quote:
Used this unit and it works like a charm, Pela 6000 Oil Extractor, IDParts.com
__________________
96 E300d |
#12
|
|||
|
|||
Quote:
__________________
UK spec Mercedes W210 E300 Turbodiesel wagon - OM606.962 with 722.6 transmission - rust free! |
#13
|
||||
|
||||
Quote:
Using the dipstick tube as the suction tube is the way to extract oil per the FSM. With the vinyl tubing and clamp I can extract the oil and not spill a drop if I'm careful.
__________________
85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#14
|
||||
|
||||
Quote:
__________________
85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#15
|
||||
|
||||
I use this one... Portable Generators, Pressure Washers, Power Tools, Welders | Northern Tool + Equipment
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
Bookmarks |
|
|