Quote:
Originally Posted by steamboatsykes
That is really interesting. What is the root cause for the low fuel pressure? Pump issues? Does this apply to the 617 also?
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I can guess.
The Fuel inlet of the Fuel Injection Pump Housing is right by the #1 Element (that goes to Cylinder #1).
If the Fuel supply pressure is low He is saying that the #1 Element gets more Fuel than the other Elements do because they get less Fuel Supply Pressure than the #1 Element. Sort of like the one who starts Eating first gets more Food.
Because the #1 Cylinder is not getting more Fuel it carries more of the load and that increases the combustion pressure in the Cylinder compared to the others.
Increase combustion pressure pushes the Rings harder against the Cylinder Walls causing them to wear more.
Also the #1 Cylinder has a slightly larger bore then the rest right from the Factory because it is not as well cooled as the others due to the Timing Chan/Gear area; so Mercedes has that the bore should be slightly larger to begin with.
On the Big Rig Diesel that are always pulling a load and imbalance in the Fuel Delivery can actually do neat things like breaking a Crank Shaft.
10-10-2013, 08:12 PM
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