Fuel Injector Leak?? - Chevy and GMC Duramax Diesel Forum
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Old 06-04-2012, 01:09 PM   eBay Motors  #1 (permalink)
 
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Fuel Injector Leak??

I am new to the duramax world, so I was hoping I could obtain answers/assistance from all of you. I have a 2005 2500HD Duramax 6.6 and was pulling my 2005 Sandpiper toyhauler a week ago to PA for a family camping trip. My truck was running well and my gauges never moved to indicate a problem nor did my check engine light come on. It wasn't until a tow truck pulled up next me and the driver told me he smelt diesel fuel from my truck. I pulled over and could immediately smell fuel. I looked under my truck and noticed fuel was dripping from all over the place so I could identify where it was leaking from. I took it to a dealer who told me a screw beneath my fuel filter was loose, so it was tightened with no charge. I didn't notice any other problems after that. It was until i was driving back to northern VA (2.5 hours away but took me about 4 with driving very slow) when I started to smell fuel again and noticed white smoke from exhaust. when I got home, I took off the inner wheel well cover to see if i could see where the fuel was leaking from. My fuel filter was dry; however, i noticed that fuel appeared to be leaking from a fuel injector behind my fuel filter (unk what # fuel injector). I want to replace fuel injector myself, but I have never done this before.

I contacted a chevy dealer to see if my injectors fell under the "special program" of GM replacing the injectors with my warranty already being expired since its a 2005 with about 75,000 miles. I was told it did not and that this program was only for 2001-2004 duramax's.

Can anyone assist with a DIY to replace fuel injectors? do i have to replace all or can i replace just the one? do i have to replace fuel lines? etc... since i saw white smoke from exhaust, did I damage engine?

Any assistance is greatly appreciated. or if anyone is in Northern VA that could assist with fixing, I would be most grateful.
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Old 06-04-2012, 03:54 PM   eBay Motors  #2 (permalink)
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I doubt you need a new injector. You may need a return line or a feed line. Or the feed line just may need to be tightened. The cylinders on the pass side are 2, 4, 6, 8. 2 being near the radiator and 8 being near the fire wall.
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Old 06-05-2012, 06:51 AM   eBay Motors  #3 (permalink)
 
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I hope that is the problem. I apologize in advance for this ignorant question... If I remove the fuel filter to get to the fuel injector and fuel lines, determine the line was loose and tighten it, can I put my ignition to acc to see if fuel continues to leak? or will this have a negative affect? or do i have to install the fuel filter back on before I can test it?

Is there a way to just remove the fuel filter bracket with the filter still attached to move it out of the way to get to lines/injector?

Im just trying to get answers before I start. I dont want to damage anything.
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Old 06-05-2012, 07:06 PM   eBay Motors  #4 (permalink)
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If you put it to acc it will not leak. There is no pump besides the injection pump which you would need the engine running to turn over.

You can very easily take the two bolts out on the filter head assembly and move it out of the way while the engine is running to find your leak.
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Old 06-05-2012, 07:11 PM   eBay Motors  #5 (permalink)
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Quote:
Originally Posted by whtdmax06 View Post
I doubt you need a new injector. You may need a return line or a feed line. Or the feed line just may need to be tightened. The cylinders on the pass side are 2, 4, 6, 8. 2 being near the radiator and 8 being near the fire wall.
the passenger side is 1 3 5 7 from front to back, its opposite from the gassers
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Old 06-06-2012, 06:48 AM   eBay Motors  #6 (permalink)
 
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Thanks for the info. Im taking my truck to an auto hobby shop tonight. Hopefully its just a loose fuel line and not the injector itself. I will keep you updated. Thanks again
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Old 06-07-2012, 10:39 AM   eBay Motors  #7 (permalink)
 
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Well, I was able to move my fuel filter assembly out of the way and was able to get to the fuel injector. I noticed it was wet around the area where the fuel line attaches to the injector. I cleaned the area with a compressed air. started my truck and noticed it was leaking fuel from the line. So I loosened the fuel line, then re-tightened and so far NO fuel leak. Extremely excited that it was not my injector. If it starts leaking again, I will just replace the line itself. Thanks again
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Old 06-07-2012, 11:08 AM   eBay Motors  #8 (permalink)
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glad to hear you got it figured out
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Old 06-07-2012, 11:20 AM   eBay Motors  #9 (permalink)
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Another place to check--

The injectors have a plastic "T", with a o-ring and a line on each one. They are connected together. That returns unused fuel to the fuel tank. The plastic T can crack. GM sells the complete part for each side. They are held in place at the top of the injector with a small hair pin clip.
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Old 06-07-2012, 07:38 PM   eBay Motors  #10 (permalink)
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That's good to hear Diesel Newbie. Thanks for updating us, I think I have a similar issue.
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