I have a 83 300dt and have been getting big chunks of black debris in my primary filter. i also stall out at about 5 gallons of fuel in the tank. so i either have a clogged filter or the supply and return fuel lines are crossed.

one of the metal lines is angled up while the other is horizontal. the angled one is stacked on top of the horizontal one.

i tried to search for this information...came up with nothing.

please help.

On mine the top one is the return line.
But follow the hose from the round silver item with hoses going to it. The line heading back to the rear of the car is the return line.

__________________
83 SD

84 CD

The black stuff can be disintigrating hose or deal fungus. Yeah, primary filter!!!

The front rubber hoses do not cross. The bottom steel line goes to the primary (clear) filter and lift pump on the side of the injector pump.

The return from the secondary filter/manifold goes through the "cigar" hose to the top steel line.

If the tank strainer is cloggedish, you can remove it from the bottom of the car to clean it. Some go nuts and remove the tank or pressure wash it in the car. Your mileage may certainly vary.

__________________
James Marriott
2003 Buick Regal
1983 300D (228k, frau Auto)
1996 Suburban K2500 (192k, 6.5 turbo diesel/4WD towmaster 10,000)
www.engineeringworks.biz
1987 300SDL junker 170k
1982 300SD junker, 265k

excellent. i used startron already, but i never thought of disinigrating hose. will replace those hoses asap.
thanks

You have the two hoses between the engine/lines, and also short runs between the lines/tank. You can use 5/16" ID hose and worm clamps to replace those, or get the "real" ones for not too much.

__________________
James Marriott
2003 Buick Regal
1983 300D (228k, frau Auto)
1996 Suburban K2500 (192k, 6.5 turbo diesel/4WD towmaster 10,000)
www.engineeringworks.biz
1987 300SDL junker 170k
1982 300SD junker, 265k

Replace with Viton!

__________________
1987 300D 180k
1985 300SD 330k Helga
1992 300D Lola 269k- Sold
1986 325 coupe Bessie >300k Original engine(ODO Broke) sold
2006 2500HD Druamax Linda- Tows boat and looks pretty in garage thats about it

I hope this helps, this is off my 85 300D.
I tried to get enough angles for you.


Charlie

Attached Thumbnails

         

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Is it true that you can test for a clogged fuel tank strainer by switching the hoses on your return and entry lines? If performance improves with fuel coming in off of the return line, then your strainer needs to be replaced.

__________________
'81 300SD

^ This will result in fuel being "kicked back" from the normal supply line and dislodge "gunk" from the strainer, albeit temporarily.

__________________
83 SD

84 CD

VERY CLEAN engine bay!!! Wow!!!

__________________
daw_two
Germantown, TN

Links:
Sold last car --- 05/2012 1984 300D Light Ivory, Red interior
Cluster Needles Paint
New Old Stock (NOS) parts

Past:
3/2008 1986 300SDL "Coda"
04/2010 1965 190D(c) "Ben"
& many more

X2 That is an amazingly clean engine.

__________________
85 300D 75K Anthracite Grey 0-60 in 13 seconds **For Sale**
84 300D 333K Black (The Velveteen Rabbit) 0-60 in 14 seconds
00 Toyota Sienna 208K (Sold)
15 Subaru Outback 43K
11 Subaru Outback 67K
98 Ford Taurus 100K (Gertie - Was Grandma's - drove it to church and shopping - really) Daughter's car now.
30 Model A Ford 2 Door Sedan (Sold) 0-60 in . . . Never reached 60

Yep - I'll bet he jumped at the chance to take those photos to show that baby off

I thought mine was pretty clean - I got lots of work to do...

__________________
327K on 1986 W201, 602.911, 722.414 2.5 190D ("The Red Baron")
139K on 1993 W124, 104.942, 722.433 2.8 300E ("Queen")

http://farm5.static.flickr.com/4081/...0bb92d3c_m.jpg http://i370.photobucket.com/albums/o...g?t=1325284354

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.
- Albert Einstein

take a walk down memory lane...

If/when you replace the return and vent hoses at the tank be careful to leave a small gap between the hose and the rubber gasket on the bottom of the tank. You should have a small amount of metal line showing between the rubber parts.

I butted the rubber return hose tightly against the rubber gasket but failed to tighten the clamp enough. The hose-line connection leaked a small amount of fuel but the hose-gasket connection was tight and pushed diesel back into the trunk so it looked like my tank was leaking into my trunk. Leaving a small gap and tightening the clamp fixed it.

Yes. It will also backwash the tank strainer. Be prepared to change the primary filter often. Everthing in the tank will get sucked up and collect there.

I'm temporarily running a W116 this way.

Also, make sure there's plenty of fuel. The return line is higher in the tank.

the pics and info let me know i have everything set up correctly. i think i am going to replace the hose and clean the screen. i do like the idea of switching the lines to backwash the tank and catch the junk in the primary filter... i may have to try that. the last time i checked the primary filter when the car was running i saw black flakes floating in the filter, about the size of a paper hole punch leavings. is there any easyish way to clean the hard lines of deposits while i have the hoses unplugged? or should i just put startron cleaner in it and leave the deposits be, hopeing that they do not all fall off and clog the car?