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Old 01-30-2009, 11:15 AM   #1 (permalink)
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Date registered: Dec 2007
Vehicle: 250 TD W124 RHD 1989, E300 TD 1999
Location: England
Posts: 87
w124 td diesel tank filter

Hi,
I have a 1989 250 TD and have been having some problems with fuel blockages. ( see previus post for details)
Anyway I finally got the towbar undone enough to be able to get at the drain plug under the diesel tank. Next problem is I can't shift the plug at all.

1) can any one confirm that the plug undoes anticlockwise as seen from below (spent a lot of time there today ;-) ) ?
2) any hints on getting the thing to move - I tried heating it up a bit with a blow torch but didn't want to over do it ?

TIA

Nick
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Old 01-30-2009, 02:20 PM   #2 (permalink)
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Vehicle: E36T AMG, 500GE
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1. yes
2. just a big wrench
3. be careful - you have not full tank
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Old 01-31-2009, 01:37 AM   #3 (permalink)
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Date registered: Apr 2008
Vehicle: 1995 E300D W124
Location: East Anglia (UK)
Posts: 44
I hate to add to your woes, but after you've cleaned the tank filter & got everything running OK, beware of the injector spill pipes blowing off! My 300D had this problem a few hundred miles after I bought it and I eventually discovered that the fuel return line was blocked at it's end, inside the fuel tank!
Apparently the car had stood for 2 years with very little fuel in the tank and algae had grown in there. Somehow,, it was able to get through the system, but finally caused a blockage - and it also messed up the fuel level sender! The float was stuck to the bottom of the unit, but I managed to free it up. (I cured the blockage by cutting the plastic return pipe inside the tank!)
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Old 01-31-2009, 01:19 PM   #4 (permalink)
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Date registered: Dec 2007
Vehicle: 250 TD W124 RHD 1989, E300 TD 1999
Location: England
Posts: 87
Hi,
Thought some people might like to see the full horror of the strainer as extracted this morning :-)

[IMG]c:\photos\merc strain.JPG[/IMG]

Most of the gunge peeled off in a layer about 1/8 th inch thick

The car has enough power now to drive up the hill where I live - which is nice.

PS I have now swapped out all the non-metallic parts of the fuel system for new replacements, having previously done all the front lines.
Attached Thumbnails
w124 td diesel tank filter-merc-strain.jpg  

Last edited by nickdub; 01-31-2009 at 01:22 PM.
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Old 01-31-2009, 01:24 PM   #5 (permalink)
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Wow, I'd say you hit the jackpot right there!
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Old 02-01-2009, 04:00 PM   #6 (permalink)
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Vehicle: 1995 E300 Diesel
Location: So. Cal.
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That is incredible! I sure wish you had taken some pics of the job - after seeing yours, I may want to pull my tank strainer just to check its condition.
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