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  #16  
Old 09-15-2009, 01:46 PM
BodhiBenz1987's Avatar
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Quote:
Originally Posted by gayle View Post
may also explain why oil looks like crud oil (dark & thick) on the dipstick.
That's diesel oil. New oil will turn black after a few minutes of idling, and it's a heavier grade oil than in a gas engine. It shouldn't look like slime or mud, but it should be darker and thicker than what you'd expect in a gas engine.

Quote:
Originally Posted by gayle View Post
No offense, but what guys, especially mechanically inclined guys, say is "easy enough" work, still sounds PRETTY COMPLICATED to me.

I went and saw what I think was the little fuel filter by the driver's side firewall (near the power steering thingy), it had an in and out tubing, but still kind of spooky to mess with. I am assuming I would just take those two tubes off the filter and replace it...... RIGHT ??????
Don't worry ... it does seem complicated when you're first learning it. I'm not that far removed from feeling that way, and I still feel that way sometimes. There are many different levels of know-how on this forum, so don't feel bad about being a beginner. Things seem easy after you've done them a few times, and it's easy to forget how intimidating it is when you start pulling things apart for the first time (especially if it's on a car you need for transportation!).

The smaller fuel filter is called the primary fuel filter. The big one is the secondary fuel filter. The small one is easy to change, and both are messy. The smaller filter is removed by taking off the two hoses ... diesel will spill out ... and ... air will be introduced to the system, which means you need to prime it once the new filter is attached. On your engine (called an OM617), you need to do it by hand, with a little pump on the injector pump. I don't have a 617, so you might want to defer to others here ... on my 616, you turn the hand pump to the left and it pops up ... then you just pump it. To tell if all the air is out of the system, loosen the screw on top of the BIG fuel filter and watch the air bubbles ... when the bubbles stop, you should be OK to start'er up.

As for changing the secondary (big) filter, I'm going to defer to 617 owners. I've only changed my 603's secondary filter, which is a different animal (I've not done it on my older car yet). All I can tell you is, as with the smaller filter, you will need to prime afterwards using that hand pump.

Again, don't feel bad for asking for help ... that's what this board is about!!! A lot of us aren't master mechanics (you can find several of those here, too, though!), and most of us don't have perfect showroom condition cars. I've been in many a pinch before and have gotten great advice and encouragement here, so I'm glad to pass on whatever I can. Most people here have that same attitude, so you've come to the right place.
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  #17  
Old 09-15-2009, 01:47 PM
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Change oil, the car needs it, and transmission fluid, your budget will thank you.

It is possible that the fuel filter has gotten enough water etc. in it that it cannot handle any more. This filter system can not notify you that it has received its capacity to separate water out. Change fuel filters.
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  #18  
Old 09-15-2009, 01:56 PM
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IIRC the secondary fuel filter bolt has a 17mm head on it. Lefty loosey with wrench, then the filter can be spun off of the bolt. More room than the 603 Bodhi you'ld be jealous how easy. Prime the filter o-ring with a little diesel fuel and you can fill the filter with fuel or screw it back on and prime by hand as Bodhi suggested (I'm aprehensive that the priming pump would leak after priming)

Ummmm... water...yep another possibility, hard to tell from a key board

Bodhi you need a set of these when you do fuel line work,$7.99
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=97578
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Last edited by pmari; 09-16-2009 at 12:37 AM.
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  #19  
Old 09-15-2009, 02:02 PM
BodhiBenz1987's Avatar
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Quote:
Originally Posted by pmari View Post
IIRC the secondary fuel filter bolt has a 17mm head on it. Lefty loosey with wrench, then the filter can be spun off of the bolt. More room than the 603 Bodhi you be jealous how easy. Prime the filter o-ring with a little diesel fuel and you can fill the filter with fuel or screw it back on and prime by hand as Bodhi suggested (I'm aprehensive that the priming pump would leak after priming)

Ummmm... water...yep hard to tell from a key board
LOL, doing in on the 603 ends up being a diesel bath. I also knocked the vacuum line apart and couldn't figure out why my car wouldn't shut off. Although on the bright side, I learned more about the vacuum system. Ah, memories.

As for the primer pump leaking, my 616 does that pretty bad, although I was still able to prime it when I fixed a hose leak. It's on my to-do list to replace the pump with the updated pump. Hopefully Gayle will have better luck with her pump.

Those fuel clips are a neat idea ... I usually just work really fast so the minimum diesel spills out.
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  #20  
Old 09-15-2009, 02:52 PM
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Quote:
Originally Posted by pmari View Post
You need to have the valves adjusted too.(maybe motor mounts) Fuel filters, Primary is a little plastic cylinder(about the size of a film canister..If you're old enough to know what that is)
Engine/transmission mounts would be my first guess. Check the engine dampener (little shock absorber thingie mounted on the front of the engine).

The primary filter is just a baffle to smooth out the fuel flow. Pull it off, spray a little cleaner through it, a little compressed air and re-install.
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  #21  
Old 09-15-2009, 03:48 PM
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Quote:
Originally Posted by BodhiBenz1987 View Post
I also knocked the vacuum line apart and couldn't figure out why my car wouldn't shut off.
Easy to do. Those lines get real brittle too, so I always have some rubber hose to slip over each of the broken ends to splice it back together.

I like those clamps. I use golf tees, rubber corks and wine corks to stop all the action while I change hoses or filters.

Gotta get a new hand primer pump as well. Mine leaks like crazy but still works.

Gail, get some latex or vinyl gloves to work on the car at Rite Aid or Walmart. Really saves clean up time. I'm not saying this because you are a girl, I use them every time.

Too bad you don't live closer, there are lots of gear heads around here that would help you out!
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  #22  
Old 09-15-2009, 03:53 PM
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Funny you should mention correlation between computers and cars... My notebook computer committed suicide about a month ago, I am now using my 8 yr old daughter's computer cpu and the old fashion big bulky monitor and funky keyboard.

My point, technology doesn't like me (and I am scared to death of it).

To start, my MB was my backup car as I said, so she wasn't taken out very often, in fact, it wasn't unusual for the battery to die after sitting 6-12 mts without use. It was only after I gave away my Caravan that I decided I'd start driving her more since she was always dependable (except, again, when I'd let her set too long and the battery would ....).

I use to be a manager at Walmart (fired for being too nice and accommodating to customers and associates - although that wasn't the reason they gave), and the automotive looked at it and said I needed to take it to a diesel mechanic. Couldn't afford it then while working, sure can't now with both of us on unemployment and him in school. But in all fairness, Wm "mechanics" aren't always the best judge about the condition of a car, that is why managers have to come check out anything seriously done before the car leaves the store.

I did have one time, last month, when I had to take her to Springfield (40 miles North) and once she got over 40, then 60, she was singing down the road, no hesitation, no loss of pickup, she was in her own (that car loves road trips). However, on the way back, I noticed she wasn't quite so "smooth" as the way there, but still okay, mostly I think it was she had picked up a shake in the front end now (like needing alignment or something). Now I am almost scared to take her on the highway, and that is bad as she has never been a problem there.

I am timid about getting dirty. I've done it, put my own battery in (and that is a feat in that car), I've put in fluids, in the past I have changed tires, but ....

So, I can do the little fuel filter, if that is the one I think it was, and maybe the big one if it isn't more complicated that removing the wingnut etc, but even I am starting to think this is over my head.

Before anyone suggests it... my husband, no way. Even if he were willing to help me, if he had the time (he's school is 40 hrs week plus 10 hrs travelling time), he is a worse jinx with techno stuff than I am, AND lets not forget, it all started at his hands anyway (coincidence or not).

My kids are 8 & 10 so that won't help, I think it sounds like I may be at the mercy, at least this time, with the mechanic. I do know that if she (my car) survives all this, I am gonna start taking a LOT BETTER car of her because I do want to keep her forever, she's been with me forever, and I can't imagine not having her. I am not a "new car" kind of gal, in fact, I went "ape" this past weekend when Branson hosted a Model A & Model T classic car road trip here, oh my gosh... I thought I'd die, I love classics of any kind, but the older (way older) types and German made cars are my heart -- don't need no fancy new fangle car, no way.

Last edited by gayle; 09-16-2009 at 06:50 PM.
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  #23  
Old 09-15-2009, 03:58 PM
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Do:

-Oil change RIGHT AWAY with a good filter and good diesel oil. Seriously....years without doing it? Come on!

-Fuel filter replacements

-Check with person that borrowed car and make sure they fueled it with DIESEL.

-Transmission very likely needs new fluid/filter as well

-Engine REALLY needs a valve adjustment done at this point, it is way overdue. They are supposed to be done every 15-20k miles!

I would take it to an independent MB shop, and have them do all of those services if you are not able to do them yourself. I bet the average shop could take care of everything in my list for $500 or so.

You can't just neglect every possible thing on a car forever and expect it to last/nothing go wrong.
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  #24  
Old 09-15-2009, 04:00 PM
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Thanks for the pixs pmari, I now know I didn't have the right things. good thing I hesitated, huh? I do think maybe the big one was correct, just I have a wingnut on it instead of that cute hexigon thingy. But I think I was way off (except for size) on the little one.

I'm gonna go back and look again now that I know better.

Again, thanks to EVERYONE, I am gonna get those gloves too because I want to start taking care of her, after all, no one's gonna love her like I will (albeit, I know I haven't much treated her as such - but I thought she was indestructible and invincible until all this).
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  #25  
Old 09-15-2009, 04:02 PM
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The big fuel filter is as easy as the little one. Loosen that big nut on top, and spin it off from the bottom. Wet the gasket with fuel, and spin the new one back on. Before you tighten it find the plastic primer pump, unscrew the top til it pops out, then pump it until no more air comes out of the filter housing. Tighten everything back up and you're done.
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  #26  
Old 09-15-2009, 04:05 PM
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Quote:
Originally Posted by gayle View Post
Thanks for the pixs pmari, I now know I didn't have the right things. good thing I hesitated, huh? I do think maybe the big one was correct, just I have a wingnut on it instead of that cute hexigon thingy. But I think I was way off (except for size) on the little one.

I'm gonna go back and look again now that I know better.

Again, thanks to EVERYONE, I am gonna get those gloves too because I want to start taking care of her, after all, no one's gonna love her like I will (albeit, I know I haven't much treated her as such - but I thought she was indestructible and invincible until all this).
The wing nut is on the power steering pump. You have to have the hex nut.
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  #27  
Old 09-15-2009, 04:19 PM
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Gayle,

You never mentioned what part of the country you're in. This forum has members scattered all around the country who can give you at least some guidance.

And since I work in IT I can definitely walk you through some basic computer hints and tips

I know I wouldn't be driving my car without the collective knowledge of everyone here!

Edit: Thanks Fred who posted after this. I missed that.
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Going back to the original post: "Can you get the vac to blow instead?" No. Vacuums are low pressure so they by nature "suck" and nature abhors them.
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Last edited by okyoureabeast; 09-15-2009 at 04:29 PM.
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  #28  
Old 09-15-2009, 04:27 PM
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She mentioned, Branson, Missouri.
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  #29  
Old 09-15-2009, 04:53 PM
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Quote:
Originally Posted by pmari View Post
IIRC the secondary fuel filter bolt has a 17mm head on it. Lefty loosey with wrench, then the filter can be spun off of the bolt.
On a 617, that bolt is a 24mm.
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  #30  
Old 09-15-2009, 05:14 PM
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Quote:
Originally Posted by toomany MBZ View Post
On a 617, that bolt is a 24mm.
I have the 24mm on my '82 240D but on my later 123's I've got the 17mm. In any event, it's not the wing nut.
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