This is for Diesel filters, primary and secondary, no tank strainers please.

The attached pictures are fuel filters from a 1984 300D W123.

No documentation of when they where last changed.

NOTE: I have added a shock dose of Biobor to the fuel tank as a precaution.

Attached Thumbnails

       

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ASE Master Mechanic
https://whunter.carrd.co/

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
2003 Volvo V70

https://www.boldegoist.com/

Secondary filter pictures

Attached Thumbnails

   

Those cars must have been fueled with pure junky diesel! I ran my prefilter over 1.5 years and took it off only to find it had not even a few flecks of stuff stuck in the screen, it had just gotten dirty on the outside! (I washed it off to find this out!)

My new one (been in for 4-5 months so far) is still crystal clear after over 4.5k miles, nothing in the screen......buy at high-volume stations!

Also, I've been using the same secondary filter for over 2 years, and I can still roar to 100+ mph no problem, fuel is a-flowin fine. I'll bet there's practically nothing in it....maybe I'll change it next summer just to see whats in it....

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

Was that gunk the result of biodiesel 'cleaning' out the fuel tank?

__________________
'87 300SDL

dieselbenz

Whunter your pictures of this stuff always amaze me. Tell me something. Is this stuff gritty to the touch or is it slimy? I have never seen it close up. I can't believe the poor fuel some people are getting. My plastic filter is still clear after 10k miles. My diesel tractors sometimes go for five summers on their filters.

__________________
1983 300-D turbo
1985 300-D turbo
1959 Harley Panhead chopper
1929 Ford coupe restored
I hang out with Boneheaddoctor at Schuman Automotive OBK#5
All liberals are mattoids but not all mattoids are liberal.

like fungi to me.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Try the StarTron Diesel additive.
My filters were constantly getting gooped up, and since I put in the St DA. 1 month ago all filters are clear and dramatically different. No power loss or hestation since. It is available at West Marine or other marine supply stores!

AA

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'87 924S
'81 280SEL

Sold ->

81 300SD -
93 300E w/ 3.2
85 300D-
79 300SD
82 300CD
83 300CD - CA
87 190E 5 spd
87 Porsche 924S

"..I'll take a simple "C" to "G" and feel brand new about it..."

X2, probably had mushrooms growing in the tank.

Wonder if it sat with a 1/2 full tank for a few years.
The Biobor would have been a necessity not a precaution !!

__________________
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

Feels like hard sharp black sand.

WOW, that looks bad. Looks like you got some of the crap from the bottom of the tank in the gas station. Many years ago, I was able to look inside a leaking diesel tank dug up from a gas station. I was amazed at the crap inside. This is why I go to fill up in stations that have recently replaced tanks, or those with high volumes like those near highways.

Pure petro diesel only.

Biobor will cause results like this- go ahead folks with crystal filters for five years, try it. After ruining a $11K IP after adding Biobor, I never use the stuff on a marine diesel anymore- IP's can cost as much as a new MB on the engines of the vessels I drive now. Fuel polishing is a much better choice.

I have run high performance diesel engines for a lot of years my last was a creation of diesel Inj.of Pittsburgh PA.the black granules look like carbon that builds around the injector nozzles.though I am not sure how this system works,could you be getting blow back from the spray nozzles into the return fuel to the tank and then back into the feed? j-n-t

I'll be darned... Never thought of a need for a filter in the return line!

there is no restriction or screen at all in the return line. All kinds of crud can get into the tank from the fuel system itself.

Hmmmmm.

Kevin

Asking for more pictures of used filters.

.

__________________
ASE Master Mechanic
https://whunter.carrd.co/

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
2003 Volvo V70

https://www.boldegoist.com/