We're due snow tonight, so I decided it would be sensible to move my 240D off the road to protect it from salt and people who can't drive in the snow!

As I was parking up I noticed this:



Which isn't really ideal. It was dripping out about a drip per second for 30 seconds to a minute after driving, at which point it stopped. At that point I realized that it was diesel and not water.

The temperature was plummeting so I had a cursory look under the hood:


It's looking pretty damp down there (not water damp, grease/fuel damp!). My first instinct was that the braided line is shot. It makes sense to me due to the vicinity and I've also not replaced that line, whereas I replaced the tiny braided lines at the top of the engine a while ago.

Any other potential culprits I should check once the snow has gone?

I think the ol' gal is mad that I've been spending too much time with my newly acquired W124 wagon



Thanks!

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Sold them all but I'll be back...

Yup, looks as though the hose is shot. Replace it quickly as the diesel fuel will rapidly turn the engine mount into goo.

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now

X2

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"Rudeness is a weak man's imitation of strength" - Eric Hoffer

Yep, the line is shot from the looks of it. Might want to consider replacing the white knob primer pump while you are in there. At the very least, get some cleaner/degreaser and clean it up as soon as possible. Like was earlier, engine mounts do not like diesel fuel. Just my .02

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2012 Mercedes ML350 Bluetec 91K (hers)
2005 Corvette 55K (fun car)
2002 VW Jetta TDI 231K (mine)
1998 Volvo S70 T5 Turbo 196K (kids)
1994 Ford F150 4WD 249K (firewood hauler)
1983 Mercedes 300D 376K (diesel commuter)

Before anything else, CLEAN THAT UP or you'll be sorry later on .

I too would recommend replacing the primer pump, if you like it as much as I do Vs. the newer typ (black & skinnier) there used to be a few places that still sold them , they age out and cause running troubles without warning .

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

I would replace both those lines to and from the pump and also the primer/hand pump if it were me. Also oddly my 220d didn't have braided hoses going into the pump when I got it, so I didn't know they were supposed to be, mine had rubber lines so when I redid all my fuel lines over the summer I used 7.5 X 13.5 mm Smooth Rubber with Inside Braiding COHLINE 21340600 lines which can be found on this site. Not sure which is preferable now that I see yours with the braided, but mine seems to be fine with the Cohline.

Replaced all of the hoses today with braided items. No rest for the wicked

Will have to look for a newer style primer pump too at some point but at least for now the hoses have been refreshed

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Sold them all but I'll be back...

eBay. 10 bucks. What can you possibly be waiting for?

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1981 240D 4sp manual. Ivory White.

Nothing really! Just got the braided lines yesterday morning and fitted them.

Just ordered a Bosch pump

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Sold them all but I'll be back...