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-   -   massive fuel leak '86 300SDL (http://www.peachparts.com/shopforum/diesel-discussion/114766-massive-fuel-leak-86-300sdl.html)

jcciem 02-04-2005 05:56 PM

massive fuel leak '86 300SDL
 
1 Attachment(s)
See attached picture, suddenly from the top of the fuel distributor, I'm losing at least a tablespoon a minute? Any ideas? Everything seems tight?












'86 300SDL 202,000
'91 560SEL 88,000
'94 SL500 22,800

engatwork 02-04-2005 07:00 PM

I'd have to see more than that. The pic is actually the top of the fuel injection pump. I would be surprised if it "suddenly" started coming from the tubing fittings that are shown. You need to look deeper in there and try to ascertain exactly where it is coming from.

H2O2 02-04-2005 07:42 PM

How does it run...rough, normal or what? Are the fuel return lines (between the injectors) in good shape? Is there any fuel leakage evident near the injectors themselves? Need more info to help ya.

rickjordan 02-04-2005 08:18 PM

Spray some brake cleaner or something alike, to clean that pump up. Then start the engine and see where exactly it is leaking from. Diesel is really a thin oil, and like oil, spreads. So you could have small leak that spread.

jcciem 02-04-2005 08:28 PM

There was some minor leakage from the fuel return lines, so I replaced all of them. The wet areas surrounding the fuel injectors are now dry. Vehicle runs and operates normally. I will clean up the area tommorrow and see if I can see where the flood of fuel is coming from, it really is a huge leak, the side of the engine is saturated with fuel.

rickjordan 02-05-2005 08:12 AM

If anything, look at it as a rust preventing measure for your engine block. All kidding aside, that mess looks worse than it probably is. Here is the upshot to a diesel leak, no chance of an explosion/fire like it would be with gas.

grimgaunt 02-05-2005 08:41 AM

in all probablity the injector lines have cracked at the junction. Common on the 602/603 engines which have (relative to the 617 motors) flimsy fuel lines.
This is probably a result of bad motor mounts

jcciem 02-05-2005 12:28 PM

1 Attachment(s)
I cleaned the entire area, and dried it. Inspected the fuel lines they appear to be fine no leakage at all. I start the car and within a second going from left to right 1, 3 and 5, are saturated (see attached new picture), and pouring huge amounts of fuel. I checked exiting fuel lines and they are dry, just the wet areas in the photo are soaked. The only thing keeping this from being a major fire hazard is the fact that fuel delivery is on the drivers side and the exhaust is on the passenger side.

Marcb 02-05-2005 12:41 PM

Could possibly be one or more bad delivery valve seals too.....

jcciem 02-07-2005 06:34 PM

It doesn't matter any more what was leaking. Apparently at highway speeds the fuel leak was adequate to travel to the exhaust where it resulted in a massive fire, there's nothing left to the car, even the tires were reduced to ash in minutes. It's just a cooked piece of metal. Thanks anyway.

Brian Carlton 02-07-2005 07:06 PM

This is one of those posts that you read and are simply too shocked to respond.

I realize that nothing can make you feel any better about the situation but, I trust that nobody was injured, which is the most important thing.

I never would have believed that a leak that you described could be severe enough to reach the exhaust.

My heartfelt condolonces on the loss of the vehicle.

dieseldiehard 02-07-2005 07:14 PM

good God! I feel badly, this is cause for a wake.
I would never have guessed the words massive were indeed massive, but that must have been a realistic choice of words, in which case you should have - - - Oh forget it it a lesson for the rest of us.
:sad3: :sad3: :sad3: :sad3: :sad3: :sad3: :sad2: :sad2: :sad2:

Ron Ragno 02-07-2005 08:29 PM

Injector leak
 
I have replaced the o-rings (seals) on the above. Not a hard thing to do. It solved the proble. Here in CA we have a low sufler fuel and it does not work with older seals. Change them and I bet your problem is solved.
R. Ragno

dieseldiehard 02-07-2005 10:02 PM

But Ron, read the thread, man! His car is history!!!!!
I sure hope insurance covers it!

WANT '71 280SEL 02-08-2005 08:43 AM

Man, I really feel bad. I know you don't want to ehar this but the o-rings and seals that need replaced on your acr are under $9.

David


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