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  #16  
Old 10-15-2009, 04:12 PM
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I've now come to the conclusion that the number one reason to choose a W123 diesel over a W115 is the oil filter. It's followed by a close second by location of the heater blower motor and third by the addition of a turbo.

My full-flow filter was missing when I got my car. I never knew it was supposed to be there until I read through these forums. Even my Mercedes expert mechanic never said anything. Hopefully oil changes had been done often enough that the oil never would have gone thru the bypass, but who knows.

A couple questions: Does turning the wheels to the right as you say really make a difference? I always have to jockey the filter can around to get it out from between the crossarm or whatever other frame stuff is up there - it seems to be a tight fit.

Has anyone ever done the filter change with the car on the ground (not ramps or jacked up)? I've been lucky to borrow a friend's lift in the past, but my luck isn't going to last. I prefer ramps to jack/jackstands but not sure if the angle of the car on ramps will make it difficult.

Also, does anyone have their oil pressure gauge peg QUICKLY after a cold start? Mine always reads zero for a few seconds and then shoots up - I've seen the same on most cold start videos on YouTube on W115 diesels, but not W123's or other MB diesels. Wonder if there is a drainback device that has worn out? And yes I do change the O-ring & washers.

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  #17  
Old 10-16-2009, 12:38 AM
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Although our W115 is a 220D/8 and may be somewhat different from a 240D, probably 95% of the time the filter was changed with the car on the driveway with no ramps or jack stands. Heck, was even in such a hurry one time it was done with a white shirt on and it stayed clean!!
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  #18  
Old 10-16-2009, 12:51 AM
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Once upon a time, when the spin-on filters first came out, people said "why do I have to pay for a new cannister every time?!" At least this one is pointed down - I have a tractor with a sideways cannister.

daBenz's oil changes are fairly painless, thanks to the retro-fitted cannister drain plug. Description is in an old post somewhere.

The only real trick is to push up on the cannister bottom when starting the bolt, and keep pushing up until the bolt is finger tight. Then snug with a wrench. Takes a whole 20 seconds once you get the hang of it, and half of that is feeling around for the wrench that slid off your chest.
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  #19  
Old 10-16-2009, 09:32 AM
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The picture Diesel911 posted in post#13 and how everyone describes how to do the oil filter change, is how all older cars were before spin on filters.

think this is bad, my 82 Datsun Diesel has the spin-on upside down. better have a pan under it.

cars were still this way in the 60`s.

Charlie
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  #20  
Old 10-16-2009, 11:07 AM
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Oil filter change "tool"

I'm amazed that someone can remove the filter in a white shirt and it stay clean! I could never do that.

My big innovation, if you want to call it that, was a rectangle of sheet metal, one side half the circumference of the filter canister, the other side a bit longer that the canister. Before I do anything, I push this metal sheet up between the crossmember and the filter adapter (the thing on the engine the filter canister attaches to).

When I loosen the bolt, oil runs down the side of the filter, but any drips will go on this metal, down into the pan. When the oil is finished draining from the canister, I remove both the canister and the metal sheet, and let them drain for a bit. Now I don't have to go clean up the underside of the pan, the crossmember and various other leaked on places.

Ron
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  #21  
Old 10-16-2009, 11:15 AM
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If I remember correctly the o-ring and crush washers in the filter kit are; 1 large rubber (housing seal), one aluminium (which fits on the long bolt), 1 large copper/aluminum (oil drain plug) and one medium size aluminum/ copper crush washer which fits the hollow "hold down" bolt on top of the housing itself.
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  #22  
Old 10-23-2009, 01:39 PM
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Uh.......prefilter?

I started this thread and got busy enough to not be able to check back until now. Thanks for all the info!

I just picked up a new filter yesterday and waiting for a clearing in the rain to change the oil.

I've done this a bunch of times, had it done by some Benz pros, and I've never seen, and never heard that I was missing, this plastic prefilter? In mine you drop the cannister out, and inside is just the little bail that you replace.

Can someone get a pic of this prefilter? Can I buy a new one? I've been running this car for YEARS without one!

mark
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  #23  
Old 10-23-2009, 03:06 PM
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Quote:
Originally Posted by abracadabra View Post
I started this thread and got busy enough to not be able to check back until now. Thanks for all the info!

I just picked up a new filter yesterday and waiting for a clearing in the rain to change the oil.

I've done this a bunch of times, had it done by some Benz pros, and I've never seen, and never heard that I was missing, this plastic prefilter? In mine you drop the cannister out, and inside is just the little bail that you replace.

Can someone get a pic of this prefilter? Can I buy a new one? I've been running this car for YEARS without one!

mark
someone posted the pic in your thread earlier
heres it again pic #224 part #0001845725 i got it for 5$ at finish line
http://www.detali.ru/cat/oem_mb2.asp...SGR=045&SGN=02
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  #24  
Old 10-23-2009, 04:34 PM
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filter screen

Okay, I tracked down this main filter screen locally, gonna pick it up this afternoon.

I saw mentioned a few times that installing this thing one has to put it back on the right direction, but no one was explicit about this! As this is the first time I'm ever gonna have one of these in my hands, what is the right direction?

Also, is it common to not run the plastic screen filter? I mean, why would the mechanics I go to (MBI, touted as some of the best around here in Portland, even if they charge too much for parts and have a few grumps around) change my filter for years and never mention this missing screen?

What am I gaining by having, am I going to notice a difference?

mark
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  #25  
Old 10-23-2009, 05:28 PM
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Wait a minute!!!!!!

Okay , after some major confusion I've realized that although my Benz is a '76 240d W115, the oil filter it uses is from a '77!!

I thought the filter I got looked funny, the Mann 925x, I got it at a new place because the other place I've always gone charges twice the price, but they at least always somehow knew to give me the '77 filter.

So..............

Do the longer cannister filter setups use the pre-filter screen? It only shows up on sites as a part for the old W115's with the shorter filter (Mann 925x)

The filter I use is: Mann PF 1055/1 x

Doesn't look like this one uses a screen??

mark
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  #26  
Old 10-23-2009, 10:05 PM
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Your 1976 240D should have the canister filter that is mounted under the car, and it should have a plastic filter screen too. On the canister it shows the part # for both the screen and the filter.

My W115 300D is missing the plastic filter screen, but i have been told its OK to run it with out that screen installed.
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  #27  
Old 10-23-2009, 10:56 PM
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filter

I do have the filter under and to the side of the engine, but, apparently my engine is newer/rebuilt from the original '76 because it has a drop in filter element that is usually listed for '77 cars, as well it has a screw on fuel filter which I was told was another updated feature.

Who knows? As far as I can tell there's no screen listed for the '77 filter, the one I use, which is longer and skinnier than the short/fat '76 filter.

mark
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  #28  
Old 10-24-2009, 04:55 AM
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Quote:
Originally Posted by 79Mercy View Post
Your 1976 240D should have the canister filter that is mounted under the car, and it should have a plastic filter screen too. On the canister it shows the part # for both the screen and the filter.

My W115 300D is missing the plastic filter screen, but i have been told its OK to run it with out that screen installed.
It is not-as the plastic mesh is your full-flow filter,you definitely need it.Oil flow-roughly 90% goes through the mesh to the oil gallery,10% through the cylindrical fine-filter (by-pass,the oil goes back to the sump via a small throttle bore-like the top section of the w123 oil filters).I`d install the palstic one ASAP.

http://www.mann-hummel.com/mf_prodkata_eur/index.html?ktlg_page=6&prdsl=1001&ktlg_lang=1&ktlg_02_sFilter=O5001&ktlg_02_sFilterList=O5001&ktlg_02_marke=&ktlg_02_mdrbz=&ktlg_02_Mitbz=&ktlg_subpage=01&gobackToPage=2
...on the picture it`s shown bottom up.

P.S.setup in the attachment below..
Attached Thumbnails
The damn W115 oil filter!-fsetup.jpg  

Last edited by vox_incognita; 10-24-2009 at 06:07 AM.
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  #29  
Old 11-02-2009, 09:31 AM
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With a new Mahle filter in hand, I went under to do the deed this weekend.

When I pulled the old filter out (completely easy, just drops out..don't know what all the fuss is about) there was a metal disc on the top of the large element with a seal. This is where the plastic main filter would normally be. It is a simple metal disk with a few holes in it.

Do I try to find the proper plastic bit before I put it together? My gut says "yes" and hopefully someone can tell me where to find one.
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  #30  
Old 11-02-2009, 09:53 AM
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Ok, the Mahle Hengst "oil filter screen - nylon pre-filter" part # is 000 184 5725 and is available at your dealer (or that awesome Autohouse place in AZ) for ~$17.

wheeeew

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