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  #16  
Old 08-02-2013, 03:36 AM
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Join Date: Nov 2011
Location: Seattle, WA
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Oh, also, I should clarify. The drain holes in the fender well are near the outlet of what I assume is the drain hose from the filler door and since I believe (correctly or not) that rainwater blows up through these holes when it's raining, I assume that fuel draining fore of these holes can do the same. Also, when I got in the car today I smelled gasoline (which is strange, it didn't strike me as particularly diesel-like) but as the windows had been up (expecting a thunderstorm) when they are usually down in warm weather, I just attributed it to the the oil dappled cardboard I keep in back to keep the car from marking up my clients' driveways until I get around to replacing the missing oil-drain plug gasket.) The trunk, however, reeked even more than usual of diesel and that's how I came to discover the little pool of diesel in the pass fender well.


Last edited by SWjames; 08-02-2013 at 03:54 AM.
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  #17  
Old 08-02-2013, 03:42 AM
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The cap gasket seems to be in good shape in the sense that it would prevent fuel from splashing out, though not from being forced out under pressure. I could not locate the filler neck assemblage in the trunk with a cursory examination. I pulled away the hard plastic liner a little, but it looked like the filler neck was hidden behind a metal body part and I was in a hurry to get home and then to the bank, so I put off a more thorough exam.
It did occur to me that the Benz might have begun to produce, rather than to burn diesel. While this thought was rather appealing, as I might be able to fill my truck's tanks from the Benz's I figured that the engine would probably have to be turning in reverse to accomplish this alchemy and my hopes were dashed by the damning evidence of still having four forward gears and only the usual one reverse gear :-)

Last edited by SWjames; 08-02-2013 at 04:06 AM.
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  #18  
Old 08-02-2013, 03:57 AM
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Oops! I also forgot to mention that the car starts and runs pretty much exactly as it always has. Also, I have never had a pressure differential noticeable when removing the fuel filler cap.
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  #19  
Old 08-02-2013, 09:56 AM
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As your Fuel level in the Fuel Tank Decreases does the leak stop?

Often when I remove My Fuel Fill Cap I here very quick but faint hiss. I don't know if pressure is going out or in.
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  #20  
Old 08-09-2013, 05:07 AM
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OK now the tank is down enough to show less than full and the regurgitating hasn't recurred in about two days. I am afraid to take the cap off, though :-) If the tank was overfilled, was it my fault? Is there something I need to look into maintenance-wise that could have caused it to overfill? It looks like there is an expansion tank associated with my fuel tank and this did happen during very hot weather. Is it possible that the expansion tank is holding fuel when the main tank is low?

Also, as a side note, it looks like I just ordered a new Nissens radiator that is the wrong part number and if I can't stop the shipment in time does anyone with a 1981- 123 300 diesel need a new radiator?

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