2006 EGR'd?

[ACamilli]

Does my 2006 3500 dually 4x4 auto, manufactured in May 2006, have a egr valve? I can't seem to find any information in my service manual cd to indicate it has one. I do have a cat. converter. It was sold new to me in Pannsylvania. Thanks very much.

 

[p-Bar]

The EGR is internal on all 600 and up engines, Cummins found a way to do it.

 

[AH64ID]

Does my 2006 3500 dually 4x4 auto, manufactured in May 2006, have a egr valve? I can't seem to find any information in my service manual cd to indicate it has one. I do have a cat. converter. It was sold new to me in Pannsylvania. Thanks very much.

There is no external EGR on any 5. 9. The 04. 5-07 meet the 04 emissions by utilizing "in-cylinder" EGR. The 4 big ways this was done was cam, pistons, timing, and turbo.



The cam lobes are timed so that the intake is a longer duration, and the exhasut is very short (shorter than any other Cummins in a Dodge) and the exhaust closes sooner to keep more gasses in the cylinder, this decreases combustion temp.



The pistons are a non-reentrant design and don't promote as good of air movement and combustion, again reducing peak combustion temps (and makes the pistons really easy to melt)



The timing is retarded to again reduce peak cylinder pressure and combustion temps, and to raise the EGT's to help the Cat work.



The Turbo has a very inefficient tubrine wheel and small housing, this provides backpressure on the manifold to again reduce the exhast scavanging effect.



The 03-04 actually has the same cam, and the turbine is even smaller, but its the combo of the timing and the pistion in the 04. 5-07's that completes the effect.



Personally I have changed my cam, use the Smarty Jr for timing, and will be swapping turbo's this spring. . should help clean up my oil, combustion, and power... thou it will increase the NOx effects.

The EGR is internal on all 600 and up engines, Cummins found a way to do it.

Correct, as long as your only referring to 5. 9's.