Being an x truck driver I like to know what is expected of an engine and what I can do to extend the life of the engine. I purchased an 09 3500 Laramie and put in a EGT guage to monitor the turbo. I contacted Cummins direct and got this answer from them concerning the EGTs.

Read the following from the botton up as it shows the questions and answers in order.

READ FROM BOTTOM UP

Cummins:
Doyle, you are correct, running the engine full throttle up an incline,
will not damage the engine. There are safeguards in place to prevent
damaging the engine, such as coolant temp. and air intake temp, these will
both give off a warning and also reduce power to the engine. RPM's should
stay above 1600 when pulling a hill.

Doyle
Thank you for your response. It sounds like according to your answer that
if I were to "put my foot into it" climbing a hill pulling my 18K fifth
wheel, that the warranty is good and the engine is designed and protected
internally from overheating the turbo and engine. Is this correct or
should I be backing out of the throttle a little? I have not made any
modifications to the engine and don't plan to but I have a pyrometer
installed to monitor temps.


Cummins
Doyle, we are not able to provide the EGT's for our engines. If the engine
is, as built by Cummins, there is no concern to monitor the EGT. If the
engine has had modifications, then neither Cummins nor Dodge are
responsible if a failure occurs, due to high EGT's.



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Doyle
D and P Truck Repair : I service the Dodge 6.7 L pickups and am asked all
the time the proper operating EGTs temps of the turbo. There appears to be
a lot of confusion and bad concernng EGTs.

What is the Maximum EGTs (preturbo) that the engine can achieve? My
experience shows around 1350 F.
How much should a driver back off the fuel to not burn the engine down? I
am suggesting 200 F to my customers. Please give me guidance and your
thoughts concerning EGTs. Thank You