Replaced the return lines when I got the 116 last December. Wife said she smelled oil today. Checked and lines between 5 and 4 and 4 and 3 are leaking. They certainly didn't last very long. I've replaced a lot of return lines since low sulphur diesel came out.

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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

wow.

what do the ends look like?

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Mine are about a year old and are starting to leak...

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

Jeezuz man, you're expecting a lot. They're still on there. I've only done the diagnostics and preliminary procrastination. I'll check the ends when I get around to replacing them.

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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

Viton is the only way to go.

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Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac?

As long as they would add one additional commandment for you to keep thy religion to thyself.
George Carlin (Wonder where he is now..)

1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won.

pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt.

Have you pulled inj's or removed them for another reason since replacing them? If so, they dont seem to last as long and can be difficult to get sealed again in my expirience.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

soooo.. october sometime?
after the primary procastination has been successfully completed?

I expect a full report and DIY:

Braided rubber OEM style?, viton (never)?, where you bought it, manufacturer, where and how it was stored before you bought it, how you installed, running any additives?, where do you buy fuel?, how often and for how long does your fuel sit in your tank?, where do you park?, do you smoke in your car?

If the returns are leaking, what about the lines at the tank?

Should clamps be used to alleviate this?

My curiosity makes me a very difficult person to work with.

There is stronger fuel line available, right? That stuff with the blue plastic on the inside diameter and no braiding.? I used this on my tank when it started leaking-- pretty solid stuff. A terrible struggle to get on though.

maybe the injector nipples are shrinking? Think about all that heat. I mean how could fresh rubber fail so quick?

j/k

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Tell me more about the blue stuff.

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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

A previous owner probably cut them off with a razor or cutters and damaged the nipples. ULSD should not affect the braided fuel lines.

I would suspect the quality of the hose. Unless the newer fuel is really taking a toll. The braided hose we used to puchase at volkswagon dealers seemed to last a very long time.

That to be fair was on earlier fuel though. Good hose tends to self vulcanize on to the nipples. Thats why it is hard to remove. Last place it should leak after being on there awhile. Possibly a new composition of material in use now. A lot of product has gone downhill perhaps on purpose as it does increase supplier business. Or just copycat junk on purpose or to meet a price point.

Good quality dealer hose lasts a long time. I replaced mine like 3+ years ago and they are still soft and leak free.....same on my dad's SD.....

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-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)

member JADAVIS is a supplier.
His website:
http://www.fryerpower.com/store/page11.html

3 ft of Viton fuel line with Free Shipping in the US!
$13.90
This kit is intended to replace the braided fuel lines on 5 cylinder Mercedes-Benz Diesel engines like the 617 variety. The posts on www.peachparts.com say that 2 feet is enough, but that does not include the line that runs from the last (first?) injector over to the fuel filter housing. I have included an extra foot to replace that line also. If in doubt, order the next larger size.

Free Shipping in the United States!

3 feet of High Temperature Viton Rubber Tubing, Hard, 1/8" Id, 1/4" Od, 1/16" Wall, Black.

He also offers combo packs at reasonable cost.

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'84 300SD sold
124.128

all I gotta say is neon green trimmer fuel line... that stuff looks like crap in there on the beautiful MB motor, but it's been on there for two years, can be removed and re connected no issues, and seems to hold up quite well.... that and a 50' box cost 11.00....

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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!

napa had it. Althought the one near me didn't stock metric (of course). guy told me it was used on 'high pressure diesel' and 'big rigs'. I really don't know if he knew exactly what he was saying, but it was definitely intended for diesel. It was your typical rubber hose but the inside was blue and acted very much like a hard plastic (like a straw, or maybe that trimmer line that VSTECH mentioned). I believe it was a goodyear product.

I will look it up and post a pic.

I hope I am not refeerring to viton - I thought I knew the Diff.

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Very much like this:

http://www.goodyearep.com/ProductsDetail.aspx?id=5144

expensive and badass

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