I had heard throught the grape vine that a local MB repair shop had a MB with ULSD IP leakage probs. So off I went to talk to the owner. Yep its true! Now this is not on the 617 engines, but the later models had the IP with the rubber O rings. He said that the new fuel is causing the O rings to start flaking apart like a biscuit or cresent roll. He was wrenching on these back in the early 90's when the last round of " desulfering" the fuel was happening and said that it will be a problem until the refiners solve the prob.

He was working on a '92 602 engine I believe.

I can wait

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1981 300D 147k
1998 VW Jetta Tdi 320k
2001 Dodge Ram 2500 141k
1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
Mercedes How-To and Repair Pictorials
I love the smell of diesel smoke in my hair

Guess I'll just make sure there's always at least a little bit of bio in the tank just to be on the safe side. This is a lubricity issue, no? I'm sure I'll be corrected many times over if I'm wrong about that.

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Ralph

1985 300D Turbo, CA model
248,650 miles and counting...

I think most of the issue is lubricity, but I have to wonder that they refiners have other stuff they can use for lubricity.

Remember when they took lead out of gas, you had to run hardened seat and valve guides or they would wear out fast.

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1981 300D 147k
1998 VW Jetta Tdi 320k
2001 Dodge Ram 2500 141k
1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
Mercedes How-To and Repair Pictorials
I love the smell of diesel smoke in my hair

I think is rather from wear rather than ULSD. Back about 10 years ago, MBs from the 80's were getting fuel leaks all around the same time and having components replaced. Ten years later, it's just time for the early 90's models to go through the same thing.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

I always run Power Service, either the silver bottle or the white bottle, so hopefully I'll avoid such problems.

Just picked up a bottle of silver today. The price has increased since I lasat bought it. I guess they figure they'll sell a lot of it now that the ULSD has hit the market.

ULSD has shown up here. The stickers on the pumps say "Suitable for all diesel engines". LOL

Cheers,

Bill

Maybe this means I'll get to pick up a w124 on the cheap when it's seals crap out?

Just hoping--

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http://i68.photobucket.com/albums/i1...Untitled-1.jpg

Hasn't Western Europe had ULSD for quite some time now?

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Doug

1987 300TD x 3
2005 E320CDI

Seal mfg's will probably switch to something hard as a rock/unbreakable, like the same material used in the large turbo oil drain back tube seal... stuff is made out of some kind of hellacious tough rubber-like substance Or my wife's first attempt at making homemade biscuits

bnc

DieselGiant -

Is it the lack of sulfur or presence of new chemical additives that's making the rubber o-rings flake apart? You said it will happen until "refiners will solve the problem", which led me to believe that you are implying the additives...

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84 300SD - bought in April '06 with 237,000 mi

will adding a little bio or wvo help with this problem? the diesel pumps here still have the old LSD

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1992 300D 2.5T 249k - Parked with a bad transmission
1981 300SD 142k - Daily driver

That's the question. The ULSD requirement came with a lubricity standard. Sulfur's impact on lubricity is no secret.

What, exactly, would cause a leak with ULSD? Folks are quick to blame sudden leaks on the nearest possible cause (fuel change). I am not saying's it's not ULSD, but I cant think it is until I understand a concrete theory.

If had a fuel leak today, but it turned out to be a loose fuel hose clamp. I was quick to think ULSD for a second there.

I don't believe that you'll see a great deal of lubricity increase with merely adding a bit of bio or WVO...

Am I safe from IP leaks with my OM617? Going to be making biodiesel soon, and if theres a chance ULSD will cause leaks, I might drive less and save what I have in my tank until I get some bio made.

i did a bit of research on ulsd a while back and the cause of leaking pumps is the ulsd the sulfur is what keeps all the seals swelled and sealing. With the reduction of sulfur from 500ppm to some tiny number like 15ppm all of the natural rubber shrinks and starts to allow leakage and eventualy premature failure of injection pumps, mechanical lift pumps that have rubber diaphrams, and various "rubber soft seals" that have contact with fuel. also part the problem that some may get from b100, svo or wvo a total lack of sulfur plus it's solvent like properties causing fuel leaks. to get around the b100,svo,wvo just changing to a synthetic rubber lines usally solves the problem. as for ulsd, the use power service products, marvelous mystery oil or any fuel lube additive if it will help prevent any problems is unknown due to the fact of who really know that is in any of these products

As little as 2% biodiesel in diesel #2 gives a bit more than half the lubricity of 100% biodiesel. It will MORE than compensate for any lubricity loss in ULSD. I can't speak for vegetable oil.

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'83 240D with 617.952 and 2.88
'01 VW Beetle TDI
'05 Jeep Liberty CRD
'89 Toyota 4x4, needs 2L-T
'78 280Z with L28ET - 12.86@110
Oil Burner Kartel #35

http://i16.photobucket.com/albums/b1...oD/bioclip.jpg