Silly question, but I can't seem to find the inline fuel filter in my crusty engine bay. Can anyone point to it for me, please?

Doug
83 300D

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Douglas
New York

Follow the line to the right of the primer pump up to where it connects to the hard line going to the tank (over on the inner fender well).

It looks like you may not have one or it is hidden below the hard line that goes to the tank.

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AJ

1985 300D (SOLD)

That would be like a quarter trying to hide behind a dime!!!

From your photo it sure looks to me like someone just decided you didn't need one and removed it

It is supposed to be before the inlet (which is the hose on the right side of the lift pump). From your photo it looks like the hose goes right into the pump but there is supposed to be a stub of fuel line there and the inline filter would go right before that inlet fitting.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz

I don't see it either. At least you have nice looking fuel lines and a newer style primer pump.

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1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!

Time to re-introduce the primary filter. You will need two additional clamps as well.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Interesting. Is there supposed to be an inline filter underneath the car by the gas tank as well?

Also, can someone snap a photo of his inline filter in situ, please?

Many thanks to everyone for their help here.

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Douglas
New York

If you have a gas tank on that car, make sure you don't route the contents to the engine.
The OE system has no filter under the car upstream from the primary filter, just a screen inside the fuel tank.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Yep.... That would be bad.

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AJ

1985 300D (SOLD)

No need for a pic. The filter goes in the rubber fuel line that goes
from the steel tank line to the primer pump......That would be the line
closest the fire wall on the pump.

I would put about an 8" piece of fuel line coming straight up off the
primer pump to the filter. then loop a piece from the filter to the
steel line.

Originally there was only about 3" between filter and pump, making for
a few burnt knuckles if trying to change the filter along the road.
An 8" piece makes it much easier.

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81 Mercedes 300SD 289k.......SOLD
82 Mercedes 300CD 252k......slow ride

82 mercedes 300 SD...mi Unknown
83 Mercedes 300D ????ksniff..gone too
84 Mercedes 300D 148k........SOLD
85 Mercedes 300TD 386k and holding some one elses project

Doug, just curious how many times have you had to change the bolt-on filter? And/or how long has it been running starved for fuel? It isn't a good idea to run it without that primary inline, but the secondary HOPEFULLY caught everything--it clogs pretty quickly though.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth

If you look at the 1st post on this tread So I went and looked at my 1st 300D Today! it will show you the filter, I'm sorry I'm at work on break, and don't have access to my pics at home . . .

Here are pics of my '83.
Some folks get their undies in a bunch if you don't use the "proper" terminology.
I find it sad when folks who are trying to ask a question get raked over the coals because they are not as familiar with some terms and that some others think that is blasphemy.
Weren't you born knowing this? Come on people.

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83 SD

84 CD

Thank you all for clearing that up. I haven't had the car all that long and it's been hibernating all winter, so I'm just putting it back on the road.

I've actually never done any of this service, so I'm learning as I go along. I've driven the car a couple of thousand miles without incident, but
I'll definitely re-install an inline filter as per the specs in this thread.

So what is the size of that odd bolt on top of the canister fuel filter? I thought it was 19mm, but it's an odd one.

Looks like I'll need the proper copper washers as well. They weren't in the box along with the Bosch filter.

Again, thanks. So much to learn here.....

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Douglas
New York

No reason to get sad over a joke, unless it helps in unknotting undies.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13