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  #1  
Old 08-03-2007, 10:18 PM
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new member, needs help on hose from Filter to Turbo

Hi

I'm new to this forum, and it looks very interesting. I just got my first diesel Mecedes 1981 300 SD trubo. never had a diesel before. I'm toying with the alt fuel thing, at this point not sure if WO or Biodiesel is the way to go. Seem that diesel prices are gong up and up (both for the cars and fuel) Being in an appartment situ makes me think WO but who know, maybe I'llbe moving soon, co-op?.

So anyways I got it from ebay check out item #190133846558 if you care to see it. The mechanic I got it from is very helpfull, but the problem is that his shop is so far from my place that I want to do some of the work in parking lot at the apartment /home, I've already fixed the dr sidedoor window, it was having problem closing completly it came out from it track. This morning I was going down the freeway and lost power. It was my stupidity, I ran out of diesel. I was told that a light on the dash would come on when I was down to about the last gal. giving me approx 20-40 miles to the nearest gas station. So I guess the light is burned out or the sending unit it dead or something else. Anyway, I wanted to run it down to that point so I could measure mi/gal. but I guess I'll do that another time.

While I was waiting for fuel I popped the hood and noticed that there is a hard black tube that goes from the underside of the air filter unit to the turbo unit had fallen off. This would probalby explain the suglish take offs this morning. After I got back to the parking lot I tried to replace it and noticed it would not fit correcly. I also took off the air filter pan/unit and found some standoffs, that kind of held the unit to the engine block, were broken and I'll replace them soon. Anyway it seem that the tube is not bent correctly it appers that the tube is bent in a U shape and if I put the side that goes to the turbo first, it will not quite fit on the upper port of the air filter, and vice a versa if I put the tube on the air filter port first. It seems as if the pipe needs to be about 1 inch wider apart. Does this make any sense? Any suggestions?
I was thinking of going to the junk yard and finding a simular tube and splicing it in, but I'm not sure if that's the way to go. Perhaps the tube is the incorrect version? perhaps the air filter/pan unit is the of the wrong type or is bent. another idea just pop into my head if I remove all 3 of the stand offs that would lower the air filter down some, maybe that will lower it enought in hight to allow the pipe to fit? Any help is appreciated.

TIA
Nooner


Last edited by Nooner; 08-03-2007 at 10:28 PM.
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  #2  
Old 08-03-2007, 10:40 PM
LUVMBDiesels's Avatar
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You have a problem with where the air cleaner is located. Since you have broken mounts on the air cleaner housing, it is not lined up properly. The U tube should fit and be very tight (there are rubber rings at each end of the U tube to seal it) There should also be ring clamps to hold the tube to the filter and housing. If your rubber seals are old they can be hard and need replacement.I had a similar problem when the air cleaner bracket broke on my 300SD. remove the air cleaner and check the bracket. replacement brackets and rubber mounts are available. I would not drive the car until this is fixed as you could ingest something into the turbo.
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  #3  
Old 08-03-2007, 11:08 PM
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Thanks LUVMBDIESEL

you state that the broken mounts are causing the problem, I state that the standoff are broken, are we taling about the same thing? These standoff are approx 1 in in dia appro 3/4 in length made from black rubber and have a bolt coming from each end. One end appears to be screwed into some tabs on a sheet metal mount (one of which is stripped) and the other bolt is screwed into the inside (underside) of the air filter pan. Or are you saying that the sheetmetal bracket that the standoff screw into is broken? I do see the rubber seals and they are very plyable and have some oil on them.
And yes I don't plan on running this till it fixed

Thanks again
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  #4  
Old 08-04-2007, 07:51 AM
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Quote:
Originally Posted by Nooner View Post
Thanks LUVMBDIESEL

you state that the broken mounts are causing the problem, I state that the standoff are broken, are we taling about the same thing? I think so. These standoff are approx 1 in in dia appro 3/4 in length made from black rubber and have a bolt coming from each end. One end appears to be screwed into some tabs on a sheet metal mount Air filter housing bracket. (one of which is stripped) You'll need a new one, or set, they're cheap, I have a bunch. and the other bolt is screwed into the inside (underside) of the air filter pan. Connected to a nut on inside of air filter housing. Or are you saying that the sheetmetal bracket that the standoff screw into is broken? Maybe, you'll have to check, remove A/C housing, you'll see. Both parts, normal failure. I do see the rubber seals and they are very plyable and have some oil on them.
And yes I don't plan on running this till it fixed

Thanks again
If the, not you tube, "U" tube! does not fit correctly, perhaps it's upside down. Or not turned just right, it pivots at the openings. Those "standoffs" are there as a shock type affair, to keep your bracket from breaking routinely. The fuel gauge in mine stops reading before the reserve light comes on. I found about that at 3:30 am Christmas...on the interstate. I just fill up now at 1/4 tank. When you turn on key, and the "idiot" lights, light, look for that low fuel orange triangle. The pic shows what I pulled off the '82, except for the new buffer, I mean standoff. And a nearly new bracket. Hope this helps.
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Last edited by toomany MBZ; 08-06-2007 at 02:52 PM.
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  #5  
Old 08-04-2007, 11:46 PM
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Thanks for the pix toomany MBZ, just what I needed.
I'll probably go to the local pick apart tomorrow and
scrounge up whatever I can get, and the machinic said
he would send me some of those buffers/stand off
and some replacment door clips, I broke, in the mail,
nice guy, just wish I lived closer to his shop.

Thanks for sharing
Nooner
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  #6  
Old 08-04-2007, 11:55 PM
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You may already have ingested something in the turbo. It should not have lost power from the utube falling off. With the engine off, check for freeplay/freespinning of the turbo. If you can't spin it, it could be shot. Unless, of course the loss of power came from the loss of fuel.

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