On my 83 300D? Or is it leaking diesel further up the chain? Under the driver's passenger's side. Is it leaking from diesel tank and running down the line? Thanks.

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85 300CD Signal Red/Tan sold
83 300D Manganese Brown 109K
97 E420 Midnight Blue 197K sold
98 BMW 328i Vert White 100K, sold
95 BMW 525i White 125K, sold
93 BMW 525iT Red 193K, sold
95 E320 Green Wagon 125K, sold
94 E320 White 127K, sold
85 300SD 156K Grey (Annie), sold
84 300D Lapis Blue 170K (Judy), sold
99 ML 320 Black (lease), 1998 C230 White (lease)
00 Honda S2000 Red (lease)
86 Mercedes 300E (sold)
84 Porsche 911 Red (sold), 1965 Porsche 911 White (sold)

It's the vent line that allows air into fuel tank as fuel is used. Looks like all those lines are ready to leak significantly, based on the wetness and corrosion. Time to replace all of them.

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Mark in MA
05 MB E320CDI 402k Granite Grey Metallic
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Agreed, it's the vent, fuel is running onto that from somewhere.

Goos luck.

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83 SD

84 CD

Gotta get some rubber hose (what size??) , zip ties and inspect it over the weekend, arrggghhhh.

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85 300CD Signal Red/Tan sold
83 300D Manganese Brown 109K
97 E420 Midnight Blue 197K sold
98 BMW 328i Vert White 100K, sold
95 BMW 525i White 125K, sold
93 BMW 525iT Red 193K, sold
95 E320 Green Wagon 125K, sold
94 E320 White 127K, sold
85 300SD 156K Grey (Annie), sold
84 300D Lapis Blue 170K (Judy), sold
99 ML 320 Black (lease), 1998 C230 White (lease)
00 Honda S2000 Red (lease)
86 Mercedes 300E (sold)
84 Porsche 911 Red (sold), 1965 Porsche 911 White (sold)

5/16?

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83 SD

84 CD

There shouldn`t any fuel leaking out of the vent. Iam thinking you might have a fuel line rusted through under the rubber where it is secured to the body.

there is the supply line, return line and the vent clamped together. the brake line is also along there.

Charlie

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2) Even less power
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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

follow those lines back to the tank, I bet you find one of the rubber hoses that connect them to the tank has failed, or is ready to...

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My drivers:
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1987 190D 2.5Turbo
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1987 300TD
1987 300TD
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Looking at your pics, the wetness is more concentrated towards the engine, not the tank so I don't think it is leaking from the tank side. If I have to guess, it is leaking under the rubber of the clamp in your pics. Moisture gets trapped in there and caused a pin hole.

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

Is the tank vent connected to the engine? Or is it connected to the tank?

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To tank. Did I get my orientation wrong? Still, under the clamp is a likely place for rust and leaks. Check the other clamps while at it.

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

Edge: I had this same thing just run new lines front to back using those rubber coated straps for each line the tough part is where they come down from over the rear control arm. I just made short hose pieces with good clamps for that area. I used 3/8 soft tubing and it worked out well.

Bingo! Right behind the rubber support is the rusty line and when I scraped it, the drip became a sprung leak. Now do I use a hacksaw to cut out a 2" section of line or just hacksaw the line and insert a 4" rubber hose and zip tie all along the rubber hose? It draining a couple of gallons so I sit and wait. Thanks.

Yes 5/16" ID Fuel Hose from the Auto Part Chain Store is also rated for Diesel Fuel.

When I was working on my Rear Cross Member I had to detach the Fuel Tubing to the Tank from the Cross Member Clamp and move it out of the way so it would not get burned by the Welding.

I evidently bent the tubing a little and developed a Pin Hole in a rusted area under one of the Clamps.

The rubber under the Clamps was mussy so it may have acutally been leaking before but the Rubber sealed it.

You might want to remove the Clamps and check under the Rubber to see if the Lines like mine are rusted under the rubber.

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84 300D, 82 Volvo 244Gl Diesel

Here's a look at the repair, messy diesel drip everywhere, now peace with the driveway:

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That should do it - well done!

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!