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Duramax diesel 6.6, how am i getting coolant and fuel in my oil

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  • Cars & Trucks Master
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Only way I know, with both at the same time. Is threw bad injector cups. These can have both problems. If one came before the other, could be other problems. Head gaskets, injector pump, coolers around the engine.

Posted on Jan 02, 2017

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Posted on Jan 02, 2017

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Suddendly start running rough and worser on overdrive. Iused scanner it showed p205,p2609and p2149.Please tell me what to do.


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Where is the fuel pump located on a 2001 gmc 6.6 turbo duramax deisel truck?


Hi Lone Ranger,

The first link offered has information to set you up US Diesel Parts Fuel Pumps Injection Pumps and Injectors GM Duramax LB7 . Now on to the location. Here is a quick feed to watch duramax cp3 pump swap . Lets finish with this gentleman's input and contribution. Duramax cp3 high presure fuel pump removal .


This will provide a look and see distant generalization of what you may be getting into and some live experiences of those who did. Fare. Well.

Jul 27, 2014 | 2001 GMC Sierra 2500HD

1 Answer

Fuel in engine base oil


I'm not much on diesels, but for gas engines the most common source is a leaking injector or fuel pressure regulator.

Jul 01, 2013 | 2001 Chevrolet Silverado 2500HD

1 Answer

My 2500 duramax diesel dosent want to start


Does it have diesel?
Could be fuel filter or fuel pump.
Glow plugs?
Injectors? these trucks have been known to have bad injectors.
Possibly the oil pump, the injectors run off the oil pump.

Sep 23, 2011 | 2003 Chevrolet Silverado 2500HD

2 Answers

Fuel in oil on 2002 chevy 2500hd duramax


THE DURAMAX ENGINE INJECTORS GO BAD AND SPRAY TO MUCH DIESEL AND IT FILLS THE CRANK CASE UP 200 THOUSAND MILE WARRANTY COMMON PROBLEM DON'T DRIVE IT ANY MORE IF U HAVE BAD INJECTORS.

Jun 21, 2009 | 2003 Chevrolet Silverado 2500HD

1 Answer

Low fuel rail pressure


who did a conversion on this truck???? the duramax is a common rail engine and can not handle wvo or sve. it will destroy your entire fuel system in no time on this truck. if you want to do a vo conversion you need to get a diesel with an inline injection pump or one of the older powerstrokes. i would suggest you quit trying to run wvo through this truck if you do not want to do a lot of very expensive damage

Apr 27, 2009 | 2003 Chevrolet Silverado 2500HD

2 Answers

6.6 duramax how many quarts of oil do I need for change


A 2003 6.6 duramax holds 10 quarts with filter. you must also use a high quality diesel rated oil such as shell rotella 15w 40

Feb 01, 2009 | 2003 Chevrolet Silverado 2500HD

1 Answer

2002 duramax will heat up underload but not at idle any ideas why


No diesel I have ever owned will heat up to operating temp while idling. I have had semi's and dump truck and a Dodge with a Cummings turbo diesel. If you don't idle a diesel up to around 1200 rpm while sitting the combustion chamber temperature will drop because the diesel does not ignite fully at low rpm. You may also notice after an extended period of idling 1/2 hour or more that when you pull away the exhaust will be whitish blue because of the unburnt diesel fuel sitting on top of the rings. Also extended low idle will wash down the cylinder walls with unburnt diesel and remove the oil from lubricating the cylinders and rings. Hope this helps you understand why your diesel won't heat up while idling. Mike

Jan 06, 2009 | 2002 GMC Sierra

2 Answers

2003 GMC Duramax Diesel won't start


I see that you had the injectors replaced 20,000 miles ago. I would still check the oil to make sure it is not overfull. The new injectors could be bad. If the oil level is not overfull then get a paper towel and touch the dip stick tip on the paper towel while oil is on the dip stick. If it's only oil it will not spread. If it has diesel in the oil the oil with spread. If this test doesn't show the injectors to be bad then you have three other possibilities. The FICM (fuel injection control module), the fuel pressure regulator, or the injection pump. It's hard to pinpoint what the problem is without running more tests and the only way to run those tests is with the computer the dealership has. Just so you know your injectors are still under warranty until 100,000 miles. Most likely you will have to take it to the dealership to get you truck fixed. I hope this helps you some.

Jan 05, 2009 | 2003 GMC Sierra

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