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#1
02-02-2011, 06:28 PM
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Change Fuel Filter? Use Biocide?
Hi,
I have an 83 Diesel 300D. I don't drive it that far, that much. Want to keep it up. Should I change the fuel filter when it looks black?...or change in terms of miles. Also, just another question....should I use a "diesel fuel Biocide" every so often to keep the tank clean? I had bought BioKleen by Power Service in the past, now I lost my job, and wondering if it's important to get this.... Thanks Lindajane 
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#2
02-02-2011, 07:01 PM
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I want to say the interval is 10k miles for fuel filters, but it also hinges on whether you need new ones or not. If you get clogged before that, obviously you're going to have to change them. Keep and eye on the prefilter, and if it's looks like a majority of the filter inside is getting gummed up, I'd change the filters. Generally I look at mine everytime I change the oil.
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Andrew '04 Jetta TDI Wagon  '82 300TD ~ Winnie ~ Sold '77 300D ~ Sold
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#3
02-02-2011, 08:25 PM
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Hey Linda,
If the little plastic filter turns black, its probably bugs unless you are using biodiesel. When it goes black, best add the biocide, run the car to get it through the system, sat 100 miles of normal use & then change both filters. If this happens regularly, change your fuel supplier, that is how the bugs get there in the first place.
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Grumpy Old Diesel Owners Club group I no longer question authority, I annoy authority. More effect, less effort....  1967 230-6 auto parts car. rust bucket. 1980 300D now parts car 800k miles 1984 300D 500k miles  1987 250td 160k miles English import  2001 jeep turbo diesel 130k miles  1998 jeep tdi ~ followed me home. Needs a turbo. 1968 Ford F750 truck. 6-354 diesel conversion. Other toys ~J.D.,Cat & GM ~ mainly earth moving
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#4
02-02-2011, 10:09 PM
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I add one oz of Startron (and 2 oz two cycle oil for lubrication) every tankful. I began two years ago when I had black deposits on the filter. No problems since. I change the filters when they start to get blocked. Haven't changed any since I started the treatment plan.
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Charles 1983 300D, bought new, 215k+ miles, donated to Purple Hearts veterans charity but I have parts for sale: http://www.peachparts.com/shopforum/mercedes-benz-cars-sale/296386-fs-1-owner-83-mb-300d-turbo-rebuild-parts.html
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#5
02-02-2011, 11:55 PM
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Use a biocide that also has an Enzyme. The Enzyme eats up the dead bodies so the will tend not to plug up your Fulters.
There should be more than a few threads on the above. Buying stuff to kill off what is in the Tank may be expensive right now but a plugged filter can stop your Car in the very worst place. And, changing Filters can also be expensive.
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84 300D, 82 Volvo 244Gl Diesel
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#6
02-03-2011, 01:22 AM
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Answer
Diesel owners need to know fuel data
Diesel owners need to know fuel data Emptying the fuel tank Emptying the fuel tank Fuel Gauge and Sending Unit threads Fuel Gauge and Sending Unit threads Fuel Sender 85 300D- Cleaned (Pics) Fuel Sender 85 300D- Cleaned (Pics) MB diesel filtration, how it works. http://www.peachparts.com/shopforum/diesel-discussion/141211-mb-diesel-filtration-how-works.html#post1055075 fuel filter change http://www.peachparts.com/shopforum/diesel-discussion/112664-fuel-filter-change-post824006.html Diesel filters, no tank strainers please. http://www.peachparts.com/shopforum/diesel-discussion/140349-diesel-filters-no-tank-strainers-please-post1046422.html?posted=1 Primary filter melted by biodiesel? Primary filter melted by biodiesel? I'm baffled and at wit's end!?!?!?!?! I'm baffled and at wit's end!?!?!?!?! Algae/Fungus fixation... Algae/Fungus fixation... Biobor, what is it, why do I need it??? http://www.peachparts.com/shopforum/diesel-discussion/105304-biobor-what-why-do-i-need.html#post723857 Filters, Fungus, Biocide, etc. http://www.peachparts.com/shopforum/diesel-discussion/115952-filters-fungus-biocide-etc-post823378.html Algae Clogged Filter Pic StarTron WORKS ! Algae Clogged Filter Pic StarTron WORKS ! Braided fuel lines weep. 1984 300TD turbo Braided fuel lines weep. 1984 300TD turbo 300SD Fuel Filter Replacement Instructions 300SD Fuel Filter Replacement Instructions Check out this fuel pickup screen Check out this fuel pickup screen .
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/
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