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  #16  
Old 07-30-2012, 11:31 PM
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hmmm, so i have been changing oil for over 20 years now and i have never seen a contraption like this before. i like it! you just take one of those cylinders and pull a vacuum on it then put the hose on the dipstick? i got a guy that can weld in a fitting like yours. now back in the old country they had DIY oil change stations at the gas station. just a pump with a wand: put a coin in, put the wand in the dipstick tube and it would suck out all the oil.
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  #17  
Old 07-31-2012, 12:11 AM
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Originally Posted by shadetree77 View Post
hmmm, so i have been changing oil for over 20 years now and i have never seen a contraption like this before. i like it! you just take one of those cylinders and pull a vacuum on it then put the hose on the dipstick? i got a guy that can weld in a fitting like yours. now back in the old country they had DIY oil change stations at the gas station. just a pump with a wand: put a coin in, put the wand in the dipstick tube and it would suck out all the oil.
Great idea, then you drove home and poured in the fresh oil???
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  #18  
Old 07-31-2012, 12:33 AM
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no silly, you either made sure you brought your own new oil or purchased some at the gas station
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  #19  
Old 07-31-2012, 01:19 AM
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You're no fun.
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"Buster" in the '95

Our all-biodiesel family
1995 E300D (W124) . .239,000 miles My car
1996 E300D (W210) . .313,000 miles Wife's car
Santa Rosa population 170,685 (2012)
Total. . . . . . . . . . . . 722,685
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970
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  #20  
Old 07-31-2012, 08:29 AM
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Enjoy your topsiders! I wouldn't want any of you to get a tiny little bit of oil on your manicures.

The most important thing is that you change your oil. It makes NO difference to the engine how you go about it.
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  #21  
Old 07-31-2012, 12:07 PM
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Originally Posted by Air&Road View Post
Enjoy your topsiders! I wouldn't want any of you to get a tiny little bit of oil on your manicures.

The most important thing is that you change your oil. It makes NO difference to the engine how you go about it.
I think we should just leave the oil in the engines and just change the engines, every 3k.

Also, I just bought a MityVac version of this gizmo. I didn't feel like dropping the encapsulation panels on the 300D..and having to jack up the 190E was getting old too!
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  #22  
Old 07-31-2012, 12:22 PM
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Originally Posted by Jeremy5848 View Post
The factory topsider has a fitting that snugs into the dipstick tube and seals with a grommet-like fitting. Thus, it uses the dipstick tube to suck the oil out of the oil pan. This works because the dipstick tube is cunningly designed (those clever Germans!) so that it is exactly the right length to reach to the bottom of the oil pan. Funola's over-the-tube design does the same thing.

In my case, as in Mike's, I use a small-diameter hard plastic tubing that goes down the dipstick tube to the bottom. Either way works.

Jeremy
My first attempt at a top sider on the Mercedes used a 1/4 o.d. tube inserted into the dipstick tube. It worked fine to remove the oil but was slow. My next design clamped a hose over the dipstick tube. Worked equally well to remove the oil except much faster.
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  #23  
Old 07-31-2012, 02:39 PM
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Originally Posted by funola View Post
I just upgraded mine to a bigger size tank and larger diameter hose (from 3/8 to 3/4). 3/4" sucks as well as drain much faster then 3/8.

The 3/4 clear hose I used is thick wall (1/8") and I purposely made it short (about 8") knowing it will get soft with hot oil and could collapse if too long.

Here's a pic of it in operation. no problem with hose collapse

How do you create the vaccum on the tank prior to removing the vice grips from the hose?
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  #24  
Old 07-31-2012, 03:31 PM
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Originally Posted by JamesDean View Post
I think we should just leave the oil in the engines and just change the engines, every 3k.

Also, I just bought a MityVac version of this gizmo. I didn't feel like dropping the encapsulation panels on the 300D..and having to jack up the 190E was getting old too!

Sounds like your drain pan was too tall.
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  #25  
Old 07-31-2012, 03:36 PM
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Originally Posted by Walkenvol View Post
How do you create the vaccum on the tank prior to removing the vice grips from the hose?
I use a 12VDC RV vacuum pump.
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