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  #16  
Old 04-12-2016, 07:45 PM
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Join Date: Mar 2016
Location: HouTex
Posts: 86
So I have according to receipts and maint log,
New Motor Mounts
New Delphi wiring harness
All new return fuel lines and prefilter/orings/fuel filter.
No blowby, you can remove oil cap and leave it loose on there with no air escaping.

Leaves me to wonder about those nozzles or delivery valves. I should do the water test and take a video to see if I am just used to newer V6 diesels that are electric motor smooth. I just think the idle should be almost vibe free?


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1995 E300 (W124)
1999 ML430 (w163)
2011 GL350 (x164)
2016 Sprinter 144" 4X4 lowtop (906)
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  #17  
Old 04-13-2016, 11:36 AM
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Join Date: Mar 2008
Posts: 4,601
Regardless of having orings replaced in the placed, air in the fuel supply system is still the primary candidate to inspect first. Very simple- using a small flashlight, backlight the clear hoses when the engine is running. rev the engine a little while doing this. look for air.


at 288k miles, injectors should probably be replaced on principle if thought to be original, I agree.
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  #18  
Old 04-13-2016, 12:07 PM
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Location: Miami, FL
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If the delivery valve o-rings are original, definitely take a look at those as well.

I did my original DV o-rings at around 150k and it did cure my lumpy idle, as well as small occasional fuel leaks at the IP. They can be a bit annoying to change, but definitely can make a big difference in how the engine runs.
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