Seems like more and more cars are leaking fuel recently... - Page 2 - PeachParts Mercedes-Benz Forum

pawoSD · #16 08-27-2006, 11:03 PM

Neither of ours are leaking yet...then again its been a bit since I closely inspected the IP....

F18 · #17 08-27-2006, 11:12 PM

I can't formulate any conclusions yet about ULSD...its way to soon!

I think that 99% of what everyone is experiencing is due to our aging MB vehicles and the presents of original injection lines and components that should have been serviced and or replaced years ago. Remember....most of the US just experienced some of the longest stretches of 100deg. temps in 20years......that alone would have aggravated aging rubber return fuel lines and O rings. But I could be wrong....

Hatterasguy · #18 08-27-2006, 11:45 PM

Good point. What does a 20 year old $.30 o ring owe anyone?

BodhiBenz1987 · #19 08-27-2006, 11:54 PM

I have not filled mine up explicitly with ULSD yet, as in the stickers still say LSD ... but I am not sure which it really was. I have not noticed anything unusual visually or in fuel economy. What should I be keeping an eye out for? Is this leaking profuse, or something subtle? I've had the whole ULSD issue in the back of my mind for a while, and I'm eager to see how it behaves in the older cars. I've been running it in my Jeep (there's one station that is now labeled as ULSD) and have noticed poorer fuel economy but nothing else. And I think the fuel economy was due to the large hole in my turbo inlet hose, which the normal mechanics at the dealership told me was "just the sound of my turbo spooling up." But that's another whole digression ... thank goodness their diesel mechanic came back from vacation and came to my rescue ...

PanzerSD · #20 08-28-2006, 01:57 AM

Quote:

Originally Posted by F18

I can't formulate any conclusions yet about ULSD...its way to soon!

Sorry, I guess that didn't interpret properly..

I meant that I had fuel leaks before I started using ULSD so I can't say that my weeping fuel lines are from the use of ULSD....

clint77002 · #21 08-28-2006, 09:22 AM

A couple of weeks ago I noticed the smell of diesel but I knew two of the return lines were weeping so I attributed the smell to that. Yesterday I did a more thorough inspection and found this:
Injectors 1 & 2 leaking (bubbling) around the seat
All 6 delivery valves leaking
Severe leak between the IP and the engine
Inspection plate drips diesel.

AAAAAAAAAAAAAAARRRRRRRRRRRRRRRRGGGGGGGGGGHHHHHHH
I can fix all except the leak between the IP and the engine. I can't see the source of the leak as it is between the IP and engine, near the ALDA.

I cannot find any seals in the FSM that could point to where this large leak is coming from. Any ideas? It drips every 1-2 seconds...a major leak and leaves a pool of diesel in the driveway.

clint

TheDon · #22 08-28-2006, 02:31 PM

i have noticed my car sounds different .. its been getting louder.. engine wise since june..im getting 5 gallons of veggie free.. ill see if that solves it

jaoneill · #23 08-28-2006, 06:31 PM

Both of my 190's have developed delivery valve leaks in the past few weeks. My veg powered daily driver was fine until the 6-way Pollack valve crapped out and I started running straight dino; one week later I had a leak

#24 08-29-2006, 09:48 AM

The federal deadline, I believe, is October 1. In the fuels world I work in I see alot of angst about all fuel switches. I think most of it is unrelated to the switch. But not all.

But what, exactly, about ULSD would increase the likelyhood of fuel leaks? There are lubricity changes, for sure, which EPA has tried to solve with lubricity requirements. Are people thinking there are higher aromatics in the fuel, which is leading to seal degradation?

I have a hard time with the causation element absent some specifics.

rkerste219 · #25 08-29-2006, 10:01 AM

I am a still new at all the MB diesel stuff. I have leaks around my injectors, and below the place the overflow hose connects. number 4 seems to leak a lot more, then the others. #1 seems the driest.

I just spent 5-10 minutes looking at the injectors, overflow hose, IP, etc.

I see a lot of people talk about delevery value leaks. not sure what a delevery value is? my IP seems ok, I did spray the engine and ip and etc with wd-40 and then washed off with water.

this wd-40 I learned here and never had used wd-40 before, except to lossen up stuck stuff.

bob 1981 240d 4 speed manual 180,000

aklim · #26 08-29-2006, 10:15 AM

Quote:

Originally Posted by rkerste219

I am a still new at all the MB diesel stuff. I have leaks around my injectors, and below the place the overflow hose connects. number 4 seems to leak a lot more, then the others. #1 seems the driest.

I just spent 5-10 minutes looking at the injectors, overflow hose, IP, etc.

I see a lot of people talk about delevery value leaks. not sure what a delevery value is? my IP seems ok, I did spray the engine and ip and etc with wd-40 and then washed off with water.

this wd-40 I learned here and never had used wd-40 before, except to lossen up stuck stuff.

bob 1981 240d 4 speed manual 180,000

I'd use brake cleaner and not WD-40.

#27 08-29-2006, 10:24 AM

Quote:

Originally Posted by rkerste219

I see a lot of people talk about delevery value leaks. not sure what a delevery value is? my IP seems ok, I did spray the engine and ip and etc with wd-40 and then washed off with water.

The delivery valves are in the IP, where the fuel lines come out. If there is a leak, you will see fuel on the top of the IP, around the fuel lines.

I agree, brake cleaner is better than WD-40 because it doesn't leave as much residue.

jnc19610 · #28 08-29-2006, 10:35 AM

I'm pretty new to diesels, got mine this year. So, I've only bought about 30 tanks of fuel so far.

I've noticed that Sunoco fuel on the PA turnpike foams more than the Hess fuel. I also noticed I got better fuel mileage with Sunoco than Hess. Then I tried out a local "Citgo" (not sure it's really citco fuel) It foams less than Sunoco, and I get better mileage on the "Citgo" than the Sunoco.

So, is there any relationship to foam and USLD?

Is there any relationship to MPG and USLD? I thought that USLD would be slightly lower MPG.

My hypothosis is, Sunoco is running USLD thru the pumps, Citgo isn't. And Hess has too much #1 in their fuel. (I havn't used Hess since early spring)

aklim · #29 08-29-2006, 10:40 AM

A year or so ago, I filled up with Woodman's diesel. Instead of the 600+ miles a tank, I get 530 at best and the power sucks. Change to another source and it comes back up, change back to Woodman's and it drops. Conclusion, Woodman's diesel sucks. BTW, I fill till it clicks and fill 3 gals more. Run it till it is on empty so I know it is mostly the new fuel.

So far most stations I get fuel at are about on par.

#30 08-29-2006, 10:50 AM

Foams? That could also be a result of a cranked fuel dispenser pump, increasing the velocity of the fuel coming out and forming foam. But the point is not lost on me that all diesel fuels are not created equal. And some are crap. Classic example occurred last winter in Minnesota. The state began requiring 2% biodiesel. Every engine problem thereafter, usually plugged filters, was pinned on the BioD requirement. When local state agents tore apart the filters to see what was going on, only a third or so showed potential BioD related clogs. The others had sediment clogs, and clogs related to the shortages of wintertime diesel after Katrina. They concluded that alot of the diesel market was in upheaval at the time. And finally, because there were some shortages (and low tank levels at the stations), customers were sucking off the bottoms of the USTs at the station and pumping more grit and waxes than usual into their tanks. Always more there than originally believed, it seems.