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Duramax Fifth Generation: 2011-2016 (LML) Discuss the fifth generation (2011-2016) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.

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Old 02-13-2012, 09:45 AM   #1 (permalink)
Armoredcars
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high sulfur diesel

Hi everyone,

I'm currently taking care of a fleet of trucks with the LML 6.6L Duramax diesel in Iraq. The engine originally came from the US and all emissions has been deleted.

Since high sulfur diesel tends to expand the seals, will I have any problems with the engine seals?

Does anybody have recommendations on what to do about the fuel pump and fuel pump seals? I anticipate these will fail soon.

The truck was originally designed to run on low sulfur diesel.

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Old 02-13-2012, 12:20 PM   #2 (permalink)
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You should be fine IMO.

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Old 02-13-2012, 12:23 PM   #3 (permalink)
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Thanks for the reply Daryl, but I want to be sure, as these trucks are for the US Army and really want to be sure the won't fail.
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Old 02-13-2012, 12:53 PM   #4 (permalink)
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Quote:
Originally Posted by Armoredcars View Post
Thanks for the reply Daryl, but I want to be sure, as these trucks are for the US Army and really want to be sure the won't fail.
Anything man-made is subject to failure! . The lowered sulfur content was for emission purposes and emission related equipment (Catalytic converters, etc).
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Old 02-13-2012, 04:20 PM   #5 (permalink)
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Quote:
Originally Posted by Armoredcars View Post
Thanks for the reply Daryl, but I want to be sure, as these trucks are for the US Army and really want to be sure the won't fail.
Not trying to be cute Armoredcars,but to my way of thinking,doesn't this subject come under ''Logistics 101 for when the U.S Army deploys modern diesel engines into areas where only high sulfur diesel is available"????I would have thought that at the very least GM would have given the Army about a gazillion explanations,waivers,disclaimers,etc. by now.Am I missing something here?

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Old 02-13-2012, 04:24 PM   #6 (permalink)
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The US Army procures armored vehicles from many different vendors. Since Ford stopped making diesel commercial vans, GM became the default choice, but GM also does not build any "export" variants of their trucks designed to run on high sulfur diesel. This means next best solution is converting existing trucks to run on HSD.

Nothing wrong with the conversion but I'm just making predictions as to what will go wrong so that we can fix it before we get there.

Any specialists who can chime in?
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Old 02-13-2012, 05:04 PM   #7 (permalink)
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What is Iraq's definition of HSD? PPB I mean.
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Old 02-13-2012, 05:08 PM   #8 (permalink)
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Iraq - 20,000 ppm. Other countries between 5000 - 10000ppm.
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Old 02-13-2012, 06:00 PM   #9 (permalink)
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Epa

Maybe the government needs to get rid of the EPA so diesel is diesel
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Old 02-13-2012, 06:11 PM   #10 (permalink)
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Quote:
Originally Posted by alleghenyrose View Post
Maybe the government needs to get rid of the EPA so diesel is diesel
Europe went ULSD before we did. Did you ever think that it could be a good thing for the your health and the health of your kids?

To answer the OPs question, I assume that you are asking about the injector pump as there is no fuel pump in an LMM. There is a person on the forum here that is from Iraq and has a truck business. Let me see if I can find him.

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Last edited by diesail; 02-13-2012 at 06:14 PM.
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