General DieselDiscussion about diesels in general. All brands are welcome, please refrain from brand wars. Discussions about types of diesel fuel also go here.
[img]/ubbthreads/images/graemlins/rolleyes.gif[/img]most of you out there already know what kinds of problems are affecting these diesels. i can tell you from my point of view. i work on them every day & have for a long time. ever since it came out i have been getting in DI & Idi Diesels w/ fuel pumps leaking & orings failing & inj's. failing big time. i've spent so much time on the 6.0's then all of a sudden i start repairing the 7.3L's. just like clock work. also had customers come in complaining about a drop in mpg. i simply tell them the problems were having w/ this fuel & tell them to purchase our cetain booster, or any other product that will add some extra lubricant to the fuel. anybody else having the same problems. seems like i see alot of post w/ leaks & component failures. this includes the 6.0L's too. but mostly the 7.3L's. [img]/ubbthreads/images/graemlins/warmsmile.gif[/img]
The Cetane number of ULSD is 3-5 numbers HIGHER than LSD was. The loss of mileage should be immeasureable, and NO loss of performance should occur. Unfortunately, the O-ring problem exists, but the refinery I just retired from adds the federal requirement of lubricity, as do, probably, all other refineries.
Cetane number improver is not necessary, and lubricity improver shouldn't be necessary. That being said, I will continue to use Stanadyne Performance Formula at their recommended dosage.
Also, this being posted on the Bio forum, most readers here should not have to worry about the lubricity, amyway.
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2003 KR F-250 4X4 CC SWB, 6.0, 5 Speed Auto, 3.73 Axle, no Limited slip. Rhino bedliner, Unicover bed cover.
Built on February 19, '03
#2 93 F-150 XLT, 5 Liter, Auto, 4X4, X Cab. 251,000 miles. Uses no oil between changes.
[img]/ubbthreads/images/graemlins/cool.gif[/img]i have no problems w/ stanadyne products. i have customers come in who use it & are satisfied w/ it. i was just going by all of my customers feedback on the cetain booster. why else would Ford put it on the market? & as far as the post being on the wrong link, it will probably get bumped to the proper one soon. i just thought alternative fuels was what that meant. where is the link for posting on L.S. fuel? general diesels? [img]/ubbthreads/images/graemlins/warmsmile.gif[/img]
I suppose the forum would be General Diesel, but anyway, I am not disputing that your customers would be satisfied with the Ford product. I may try it myself.
What I am saying is that I have never been able to discern any difference whether I use the Stanadyne or not, and I believe that any noticeable difference would be in a person's head, but I don't mean that the additives are useless. I really don't know. Now, how stupid is it to spend money on a product that one doesn't even know if it does anything? I guess I am pretty stupid, because I am going to continue using an additive.
Cetane improver is another question, but it is a part of most additives, so I'll use it, too.
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2003 KR F-250 4X4 CC SWB, 6.0, 5 Speed Auto, 3.73 Axle, no Limited slip. Rhino bedliner, Unicover bed cover.
Built on February 19, '03
#2 93 F-150 XLT, 5 Liter, Auto, 4X4, X Cab. 251,000 miles. Uses no oil between changes.
So if the cetane is higher and the lubricity, or lack there of, has been compensated for, why is there problems with O-rings, injectors and fuel pump leaks?
Randy
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1999 ( Build date 10/98 ) 1-Owner F-250 XLT PSD, XLE8 ( started out as XLE4 ), Auto Trans w/sonnax valve tricumulator springs, 4x4, manual hubs, manual shift transfer, 3.73 gears, Tymar intake, open air CCV, A-pillar 3 gauge W/Auto Meter pyro, boost, trans and axle temp in Mag-Hytec covers, Banks 4" monster exhaust, DI 4 Position Flip Chip stock-75-100-110, early 99 turbo conversion W/ ATS BB Turbo, gutted EBPV, Smitybuilt bumper guard, Lund bug deflector, Lund SS cold air grill guard, Wet Okole seat covers w/Powerstroke logo, custom made floor mats ( way better than any store bought mats ) http://community.webshots.com/user/ran440
Buy American, Keep Your Job.
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So if the cetane is higher and the lubricity, or lack there of, has been compensated for, why is there problems with O-rings, injectors and fuel pump leaks?
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Well, the youngest of these 7.3s was built in October 2002 and, generally, has many, many miles on it. Could it be it is just time for some of these o-rings to fail? ALSO, the 7.3 engines were not designed to run ULSD and the fuel COULD be cleaning out some old deposits adding to a leak issue. The 6.0s, I have read many places, were designed for this fuel so o-rings for them SHOULD not be an issue.
RoyC
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2005 Limited, 6.0L PSD, 4X2, Mineral Gray, 3.73 LS. Excursion Build date 02-08-05 6.0L 2005MY Engine Build date 01-03-05 Huntsville, Ala.
2005 50th anniversary Thunderbird Red with all
options except hardtop.
Old Ride: 2003 Excursion 6.0 L March 2003 Build 73,000 with no significant issues.
Well, the youngest of these 7.3s was built in October 2002 and, generally, has many, many miles on it.
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Roy
Not really sure what you meant by this as my 7.3 in my early 1999 was built in Oct of 98 and the 7.3 goes back further than that. [img]/ubbthreads/images/graemlins/confused.gif[/img]
The ULSD is supposedly formulated to be used in all diesel engines from current on back.
And as far as the engines having many, many miles on them as you put it, are built to last many, many miles. [img]/ubbthreads/images/graemlins/grin.gif[/img]
Randy
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1999 ( Build date 10/98 ) 1-Owner F-250 XLT PSD, XLE8 ( started out as XLE4 ), Auto Trans w/sonnax valve tricumulator springs, 4x4, manual hubs, manual shift transfer, 3.73 gears, Tymar intake, open air CCV, A-pillar 3 gauge W/Auto Meter pyro, boost, trans and axle temp in Mag-Hytec covers, Banks 4" monster exhaust, DI 4 Position Flip Chip stock-75-100-110, early 99 turbo conversion W/ ATS BB Turbo, gutted EBPV, Smitybuilt bumper guard, Lund bug deflector, Lund SS cold air grill guard, Wet Okole seat covers w/Powerstroke logo, custom made floor mats ( way better than any store bought mats ) http://community.webshots.com/user/ran440
Buy American, Keep Your Job.
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1999 ( Build date 10/98 ) 1-Owner F-250 XLT PSD, XLE8 ( started out as XLE4 ), Auto Trans w/sonnax valve tricumulator springs, 4x4, manual hubs, manual shift transfer, 3.73 gears, Tymar intake, open air CCV, A-pillar 3 gauge W/Auto Meter pyro, boost, trans and axle temp in Mag-Hytec covers, Banks 4" monster exhaust, DI 4 Position Flip Chip stock-75-100-110, early 99 turbo conversion W/ ATS BB Turbo, gutted EBPV, Smitybuilt bumper guard, Lund bug deflector, Lund SS cold air grill guard, Wet Okole seat covers w/Powerstroke logo, custom made floor mats ( way better than any store bought mats ) http://community.webshots.com/user/ran440
Buy American, Keep Your Job.
The problem is apparently caused by the reduced aromatics in the ULSD causing the O-rings to shrink.
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2003 KR F-250 4X4 CC SWB, 6.0, 5 Speed Auto, 3.73 Axle, no Limited slip. Rhino bedliner, Unicover bed cover.
Built on February 19, '03
#2 93 F-150 XLT, 5 Liter, Auto, 4X4, X Cab. 251,000 miles. Uses no oil between changes.
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The problem is apparently caused by the reduced aromatics in the ULSD causing the O-rings to shrink.
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Yessir, an injection shop owner with a good reputation said shrinkage was the cause of leakage during the first go-round in '92. At that time he said the new O-rings were of the same material, but since they hadn't been exposed to old sulphured diesel, shrinkage and the resulting leakage wouldn't occur. He was evidently right, because I'd had the same O-rings with no problemo since '92 until I changed injectors about a year ago and replaced them.
Any idea if running biodiesel like B20 would reduce the likelihood of O-ring shrinkage?
Randy
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1999 ( Build date 10/98 ) 1-Owner F-250 XLT PSD, XLE8 ( started out as XLE4 ), Auto Trans w/sonnax valve tricumulator springs, 4x4, manual hubs, manual shift transfer, 3.73 gears, Tymar intake, open air CCV, A-pillar 3 gauge W/Auto Meter pyro, boost, trans and axle temp in Mag-Hytec covers, Banks 4" monster exhaust, DI 4 Position Flip Chip stock-75-100-110, early 99 turbo conversion W/ ATS BB Turbo, gutted EBPV, Smitybuilt bumper guard, Lund bug deflector, Lund SS cold air grill guard, Wet Okole seat covers w/Powerstroke logo, custom made floor mats ( way better than any store bought mats ) http://community.webshots.com/user/ran440
Buy American, Keep Your Job.
No, I don't have a clue, but according to the fuel and engine reps (all brands) in a really informative article in Feb. Trailer Life, the problem is pretty rare anyway.
I remember when LS fuel came out and our regular diesel then became off road/commercial RED fuel., The oil companies said the only difference was that it was now red, well I had to stop using neophreme gaskets on yacht fuel tank covers and switch to Buna-N (Nitrile) as the supposedly same old diesel fuel was now attacking neophreme rubber???. So I take what ever the oil companies claim about the new ULSD with a grain of salt!
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2000 F-250 PSD,SC,SB, 6spd, 2WD, 3:73LS, ORU Diff Cover, Slide-N-Lock Cargo tiedowns, B & W Flip hitch, Timbren Springs, Jason topper, Diablo, 4" exhaust,Southbend clutch, AIS, FPR...M.O.U.S.E!
I know I'm going to get beat over the head for this.
The newest engines were designed for the new fuel, and vice-versa.
Sure the fuel companies say the ULSD is "recommended" for 2007 (2006?) and older engines. ULSD is the only fuel available for on road use! This does not mean that the fuel is compatible with the engines.
Just like unleaded was "recommended" for older vehicles after leaded gas was phased out. We all know that older engines with unhardened valve seats suffered from valve recession from the lack of lead lubrication.
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1985 International rollback, 6.9L 5 speed "Li'l Big Truck"
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