What size is fuel injector return line. My has no clamps ?? were can I buy it aftermarket. Thanks

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1983 300 D 256K Turbo drain, vacuum pump

2mm I believe.
1/8" tygon weed eater fuel line works well...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

What really worked WELL was the system the W-115 diesel used. All metal between the injectors and only the crappy rubber hose between the last one and the main line back to the tank. MB really dumbed it down for the 123!!!

Drove the 115 220D/8 for twenty years and never had leak one in the fuel system. Now thats durability.

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1961 190Db retired
1968 220D/8 325,000
1983 300D 164,150

3.2 mm, try using the button at the top of the page.

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83 SD

84 CD

National Auto Parts (NAPA) sells the real thing.

Where to buy fuel return hose
Diesel Injector return lines, where to buy? - PeachParts Mercedes ShopForum

The Thread with the part numbers
fuel return line replacement part - PeachParts Mercedes ShopForum

Viton Injector return Hose part numbers
VITON Return line number - PeachParts Mercedes ShopForum

From my notes:
Injector return hose plastic tube
any lawnmower/chainsaw repair shop should have hose that will work too.
I bought a 50' box of 1/8" tygon clear fuel hose and the stuff holds up for about 3 years.
cost me like 15.00
The brand I used is Oregon, it is a Tygon fuel hose.

All sorts of info can be found here:
DIY Repair Links
DIY Links by Parts Category - PeachParts Mercedes ShopForum

PeachPartsWiki: Do It Yourself Articles - Mercedes Vehicles

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84 300D, 82 Volvo 244Gl Diesel

I just ordered some from Pelican Parts (i believe the new sponsor of this site..) its only $4 per meter. they also have the end plug for the last injector.

605-078-05-81-M20 $4.00
Diesel Return Hose 3.2 X 1.9 mm For Diesel Injectors (Sold by the
Meter), 240D M616.912-, Brand: Cohline

403-070-01-55-M21 $2.25
Diesel End Plug, 240D M616.912- Brand: Contitech

i ordered yesterday and they already shipped it out today for tomorrow delivery!

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1981 240D ... 265k
1977 240D ... 265k
1977 240D ... 250k

That's good... When I needed it it wasn't available so I had to get it from the dealer. Luckily my dealer goofed and ordered me twice as much as was needed for my 240D so the parts guy gave me the excess and I had just enough for my 300D.

... in my yard I order it by the roll... my last order (from fastlane then) from phil was for 25' I'm nearly out of it...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

as i mentioned, i ordered from pelican parts yesterday afternoon - and it just arrived! thats some fast shipping. its my first time ordering from them, im glad to see they are on top of things. i look forward to their new and improved catalog they are speaking of, i'll definitely be ordering from them again!

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1981 240D ... 265k
1977 240D ... 265k
1977 240D ... 250k

They don't clamps if you buy the correct hose.

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i've tried the standard fuel hose 1/8" from local auto stores, and it doesnt work very well! and the walls are too thick to get it on tight,,,took me forever to to get it on, and it still leaked!! get the right stuff the first time around (someday i'll learn this too) and it will be easier to install and not leak- i just put on my new return hoses i got from pelican parts today and it was a cinch, slipped right on, but nice and snug.

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1981 240D ... 265k
1977 240D ... 265k
1977 240D ... 250k

Yes, it is a good idea to keep some extra on hand in your trunk as you can easly leak off enough Fuel that would cost more than the extra Hose when one the lines leak.
It is also good for use on other projects.

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84 300D, 82 Volvo 244Gl Diesel

so true! it will work in a pinch for vacuum line too! my 240 snapped a vac line once and wouldnt shift out of 2nd gear..i pulled over, threw a bit of 1/8" hose i had with me on there and i was back on the road! hmm, now that i think about it, i dont think i ever went back and replaced that hose with actual vacuum line... i guess it worked pretty good then!

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1981 240D ... 265k
1977 240D ... 265k
1977 240D ... 250k

Thank you all for your answers i will order some now

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1983 300 D 256K Turbo drain, vacuum pump

I am having an issue. The last return line(injector closest to the firewall) goes to where? Mine is leaking and I dont see where/what it connects to.

Anyone got pics?