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Injectors: replace them all?

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  #11  
Old 09-07-2011, 05:08 PM
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Originally Posted by tiger63
I am glad all you experts know everything, go visit a fuel injection service and look at some injectors removed your 6.7 and later. None of what you say about crank case gas not being fed back into the fuel system is crap.

After 2004 the epa required what had been trapped by puke tubes and by pass vent pipes had to be reburned...thus the problem !

enjoy your problem, my 5.9 2000 does not have the problem each of you face. Quit drinking dealer kool-aid.
you are still wrong here.... cummins has never burned crankcase gasses, the 6.7 may, but im almost positive it doesent, in 2007.5 with the 6.7 they did use egr, other engines out there do burn crankcase gasses but they do NOT go into the fuel system, BTW my 07 5.9 has none of this stuff on it either
 
  #12  
Old 09-08-2011, 09:51 PM
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The Closed Crankcase Ventilation System (CCV) consists of several parts to make it functional. One part is the filter. The filter is serviceable and prevents oil mist from entering the discharge tube of the CCV system. It is not cleaned, but replaced at 60,000 mile intervals.
The crankcase breather assembly is integrated into the cylinder head cover (3) and is serviced separately. The external fittings (2) to the breather tube and breather drain tube are serviceable.
The crankcase breather assembly is integrated into the cylinder head cover and corresponding breather cover. Crankcase gasses travel into the breather cavity under the breather cover where they pass through a filtering media (serviceable maintenance component) which separates the oil from the crankcase gasses. The oil drains back into the engine block through two hoses (2) on the left side of the engine.
The crankcase gasses are directed through the Crankcase Depression Regulator (CDR) valve which allows the system to maintain a constant positive pressure in the crankcase. The CDR valve is a non-serviceable component located on the underside of the breather cover. Clean crankcase gasses flow from the CDR valve into the fresh air side of the turbocharger compressor.



The closed crankcase ventilation valve is used to vent the crankcase gases back into the intake of engine. If the crankcase ventilation filter becomes too restrictive, under high intake vacuum situations, the closed crankcase ventilation prevents the engine from syphoning crankcase gases/oil from the crankcase of the engine. The closed crankcase ventilation valve is located under the crankcase ventilation filter cover at the top of the engine.
Maybe this will clear things up a bit. Some crankcase gasses are burned but not all. There is definitly no moisture in there, the filter on top the valve cover will take care of that.
 



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