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Old 09-09-2008, 05:20 PM
rrgrassi's Avatar
mmmmmm Diesel...
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IIRC, the primary filter is the spin on and the secondary is the small plastic one. I went through many plastic filters while the bio-d was cleaning out the system.


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Old 09-09-2008, 08:49 PM
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I would also try reversing the fuel delivery and return lines under the hood. On my 300d, as long as you have 3 gallons in the tank it'll suck through the return line. That's a good way to get home if you get stuck, but also a good way to see if it's the tank screen and if you're lucky the pressure of the fuel returning could blow it clean.

I would also try setting up a fuel cell under the hood with a milk jug or something similar.

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Old 09-09-2008, 09:33 PM
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What about creating a small tank in the engine compartment, like the DieselGiant does to do an engine purge, until you can get the tank cleaned? All you need are a couple of hoses , clamps, and a plastic fruit jug.
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Old 09-09-2008, 09:55 PM
LUVMBDiesels's Avatar
Dead on balls accurate...
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As a quik check, and to get you home if you are stranded, reverse the fuel lines. take the fuel return and connect it to the primary filter and take the fuel line and connect it to the return. This will eliminate the tank screen, Make sure you are over 1/4 full as otherwise the return line in the tank is goiing to be exposed to air not fuel.

I second doing the compressed air blow out of the lines. I did that on the 300SD I had and it worked very well.
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Old 09-09-2008, 10:10 PM
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Originally Posted by rrgrassi View Post
IIRC, the primary filter is the spin on and the secondary is the small plastic one.

It's the other way around.

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