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Engine Specific Info and Questions => IDI Engine => Topic started by: dlorimer on July 16, 2007, 10:43:17 pm
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Ok, the time has come for a thread detailing the results and fixes regarding Ultra Low Sulfur Diesel (ULSD).
The law changed here in January of 2007. I have been running it since then without additives (my stupidity). I have recently discovered a major leak at the top of my water separator, a leak on my fuel filter, and a leak on my Injector Pump. Also, I have detected a leak in the cylinder o-rings. Besides leaks, my mpg is about 3 mpg lower than before.
Anyone else with similar experiences? Also, what additives are best for ULSD. I am definitely needing to start using them before this stuff completely destroys my car!
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i was talkin with the place where i used to work in ohio,and they said they are gettin power stroke injector issues+some increase on pump problems
this new ulsd sounds like shades of the early 90's all over again with pump /injector issues :evil: (thumbdown)
ive heard all kinds of stuff so far
"add 2 stroke oil"
"add fuel additive,just make it 2x the recommended dose",,etc etc..
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ULSD has been out in australia for a couple of years now.
vw make a point here of saying to use it in the new tdi's, but i found that my old 1.5n/a got lower milage, more smokey using it.
i think for the older idi's there are a couple of things you could do. low lubricity is a problem, so adding a small amount of canola would help, say 2-5%, or if you can get it,i use biodiesel, which also improves lubricity.
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According to a service bulletin we sent out to our customers, ULSD is not only changed by the reduction of sulfur content, but by "eliminating fractions in the oil having a heavy molecular structure". This results in a "lower specific energy content than standard diesel fuel, in some cases by as much as 15%". That would explain the mileage drop.
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I sell a lot of this additive to my diesel customers..
http://www.blauparts.com/proddetail.asp?prod=LM+2002
Claims to have additive that add increase lubricity etc. I can't really see any other good solution other than using biodiesel to offset lubricity and raise cetane rating
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I have recently discovered a major leak at the top of my water separator
Eliminate it, it would have leaked eventually anyway. VW did away with it later in the idi series anyway.
I have detected a leak in the cylinder o-rings.
Cylinder O-Rings?
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Piston Rings?
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Probably - I don't know what they're called. The seal on the piston that keeps the exhaust from going into the oil pan.
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I just swapped from a 1.6 n/a to a 1.6 td and it developed a leak on the injection pump almost immediately (at the accelerator spring seal) . Could have been for many reasons, but one person I spoke to said the new ULSD was causing IP leaks in older pumps...hmm
It doesn't matter, though, because I decided to go buy a Giles pump, so things should be rip-roaring again soon.
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well this has been covered many times over before, so let me explain why the pumps develop the leaks.
older diesel has aromatics in it that help 'swell' up the seals in the pump. the way the ULSD is refined, removes these aromatics, thus the seals shrink once exposed to enough of the refined diesel. and there you have it... that is why your pumps leak.
so just get your pump re-sealed, and be happy.
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Does anyone know if the ULSD is being used in No.2 "red" diesel?
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are there any additives that restore the aromatics neccesary for seal swelling?
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I think I was running ATF and it fixed my leak, or I was using it while the leak fixed itself. I can't remeber though, I've run so many additives. I usually run 1/6 quart/liter per tank when I was using it
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are there any additives that restore the aromatics neccesary for seal swelling?
Redline diesel fuel catalyst claims to help restore shrunken seals.
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Does anyone know if the ULSD is being used in No.2 "red" diesel?
From what I understand, the road fuel and the heating oil are exactly the same except for the dye that makes it red. At least my bunny don't know the difference. wink wink
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are there any additives that restore the aromatics neccesary for seal swelling?
i dont know if id try it,probably a bad idea,but......
an old mechanics trick to swell seals that dried up in an engine thats been sittting for a long time was to add a pint of brake fluid to the engine oil to swell the seals back up
like i said .probably a bad idea :lol:
and i was just rambling
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If you take power away from the stop solenoid and remove the lines from the filter and loop them into a bucket with a mix of brake fluid and diesel you would limit the potnetial damage to the pump only, provided you flush it well with pure diesel afterwards. Maybe you'd need to let it sit in the pump overnight or something?
I've never tried or heard of this before so I'm not recommending it or knocking it
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Brake fluid is nasty stuff. It eats through lot's of things. I once spilled some on the roof of some f**ker's car that I had a issue with(looong time ago). Yep, eats through paint. I would hate to see what it eats if its in the wrong internals.
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brake fluid is for brakes only ... pour it into / onto anything else and the seals will disappear permenantly ... any non brake seal ....
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someone should drop some injection pump seals into some brake fluid for kicks... just to see what happens after a few days.
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When I was in the service, I was doing a pre roll out check on my hummve. I checked the brake fluid level and noticed lots of little gooey pieces of *** floating in the resovoir. Someone had added DOT-5 fluid to the system, mixing it with DOT-3 and 4. That stuff ate every rubber piece in the entire brake system. Only thing that would have stopped the vehicle was the manual e-brake.
On another note. If No.2 home heating fuel is now ULSD, I wonder if that will start to play havoc with burner systems? Oil heat is big in the north east. Just a thought.
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supposedly the DOT 5.1 uses silicone and does not eat seals, however it will seep out a lot easier. It is compatible with both dot 3 and 4, unlike DOT 5 :)
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On another note. If No.2 home heating fuel is now ULSD, I wonder if that will start to play havoc with burner systems? Oil heat is big in the north east. Just a thought.
Thing is, there are precious few seals or moving parts in a burner system and the pressure is considerably lower than an IP makes. The only thing you might notice is a tiny increase in consumption in compensation for the lower btu content. And that would be hard to track due to heating requirement differences from one season to the next.
You can pump just about anything that will burn through an oil burner pump, with moderate filtering even.
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I sell a lot of this additive to my diesel customers..
http://www.blauparts.com/proddetail.asp?prod=LM+2002
Claims to have additive that add increase lubricity etc. I can't really see any other good solution other than using biodiesel to offset lubricity and raise cetane rating
How much of it do you add per tank?
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Does anyone know if the ULSD is being used in No.2 "red" diesel?
From what I understand, the road fuel and the heating oil are exactly the same except for the dye that makes it red. At least my bunny don't know the difference. wink wink
That's my impression, too.
Might make a difference in the really long run, but I don't see anything in the day to day use.
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Funny old thread. I bought my Caddy two years before it was started and then about a year after I had an issue with my front seal in my IP pump leaking. Then a couple of o-rings. Went through it with a "rebuild kit". Still driving the pee out of it over ten years later. For a while I tried adding Power Service to every tank full. Until I forgot and frankly just stopped. So in my personal experience with this single vehicle I've not seen any more issues with ULSD.