Oil change pump??? - Mercedes-Benz Forum

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post #1 of 12 (permalink) Old 06-06-2009, 06:16 PM Thread Starter
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Oil change pump???

I am getting old and don't relish climbing under cars anymore. I saw a gizmo that makes oil changing easier. A tube goes into the dipstick tube and then the oil is sucked out. Any good? Feedback? Where would I get this thingy?
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post #2 of 12 (permalink) Old 06-06-2009, 06:51 PM
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Hi, Alan.

There are pumps, but most are suction devices. This is a pretty good one and very affordable, and it has a large-enough capacity that if you move to the newer MB's you'll be able to evacuate their 8.5 USQ sumps with it as well:

Amazon.com: Motive Products Power Extractor Allows Easy Evacuation of Engine Oil, Transmission Fluid, Brake Fluid and other Fluids: Automotive

(FWIW, I'm getting old and don't relish climbing under cars anymore, but laying down is often a good thing anyway, lol).

Take care and enjoy the ride,

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post #3 of 12 (permalink) Old 06-06-2009, 07:09 PM
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post #4 of 12 (permalink) Old 06-06-2009, 07:37 PM
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I've heard it said that *dealers* are using the suction devices for oil changes. No need to put the car of a lift.
That said, I don't really like the idea. I like to change the oil in my cars after just doing a highway run so as much crap as possible is suspended in the oil and it's thinned out. Removing the drain plug and seeing the oil gush out carrying all that suspended crap just plain makes me feel good.
Having a small tube inserted in the dipstick tube just can't be as thorough.
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post #5 of 12 (permalink) Old 06-06-2009, 11:40 PM
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I, like many members, do my own oil changes. To this day, I've never had to jack any of my cars up to do so. I have a large low profile oil catch container that rolls under the car, I can easily reach the drain plug with one hand and I also drain the oil when it's warm (not screaming hot). No drips, no mess, no fuss for me.

Good Luck,

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post #6 of 12 (permalink) Old 06-07-2009, 04:57 AM
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That one from motive products looks pretty good. I recently got a Mityvac 7300, from Grainger for about $140 then shortly thereafter found it's all over the internet for about $80-100; it's called an air-operated fluid evacuator. Powered by an air compressor it sucks up oil, power steering fluid or trans fluid. I had just gotten a '90 300CE and wanted to change all its fluids. First, I did the oil change, very easy. Once you warm up the engine almost all the impurities are suspended in the oil so using the drain plug really isn't that much more thorough, especially if you do oil changes within reasonable intervals. Then I had the trans serviced at a shop in order to know that the filter & fluid were now brand new, I drove it three or four days to circulate, then I sucked out all the trans fluid I could (about half of it since the torque converter was still full; oh well.) Replaced what came out (still brand new but regular-grade stuff) with Royal Purple Max ATF (synthetic) resulting in about half of my fluid now being synthetic. I plan to do it again, that should give me about 75% synthetic I think. The trans had no problems but now it shifts even smoother and seems happier. I've also sucked out all the oil in the power steering reservoir twice, and will do it again this weekend. The machine also has fittings to place on your brake lines and suck out all your brake fluid, while (this part is very important) making sure the reservoir stays full. Effectively replacing all the brake fluid with new, assuring no water or contaminants; MB says to do this every two years or so. I had this done on my 190E and the shop charged me $125.00! Although I overpaid for the machine and the instructions it came with aren't very good, it was easy to figure out how to use it, and makes changing oil very easy, fun and fast without spilling a single drop. I told my friends to bring their cars over for oil changes! I'm going to replace my rear differential fluid next. With two Mercedes and a BMW and a truck too, I will get a lot of use from this machine and I'm happy. So are the cars! Just don't pay full retail!
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post #7 of 12 (permalink) Old 06-07-2009, 05:30 AM
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I use a Topsider. It has a homemade sort of feel but it works fine for me.
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post #8 of 12 (permalink) Old 06-07-2009, 05:34 AM
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I have a MightyVac as well. Works great provided you warm up the engine first.

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post #9 of 12 (permalink) Old 06-07-2009, 08:55 AM
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The top side oil evacuator is likely something we are all going to need to get used to as technology continues to evolve.

I read that on the newer vehicles that MB recommends using the topside oil evacuator. Further it stated that "for now" drain plugs will still be installed on the oil pan.

The way it was wrote I am assuming that in the not so distant future there will be cars coming out without drain plugs.

Unfortunately I don't have an air compressor and all of the electric oil evacuators look cheap. Any good electric ones out there?


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post #10 of 12 (permalink) Old 06-07-2009, 10:11 AM
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I use a Moeller-branded fluid pump. It works by introduction of a low vacuum in the oil chamber via hand pump (looks like a large bicycle pump).

You can probably find a cost-effective solution at a marine store since oil pumps are the only convenient way of doing oil changes on smaller I/O engines.
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