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What's the deal with letting the XD idle? Many say it's not a problem for diesel engines; others say it's not good. Your inputs and experience is appreciated.:serious:
 

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What's the deal with letting the XD idle? Many say it's not a problem for diesel engines; others say it's not good. Your inputs and experience is appreciated.:serious:
Older non def diesels fine. But with the new emission systems. Idling for long periods isn't the best thing for the system.
 

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What's the deal with letting the XD idle? Many say it's not a problem for diesel engines; others say it's not good. Your inputs and experience is appreciated.:serious:
The issue is that the engines of this era are still generating diesel particulates that clog the DPF with EGTs being insufficient to burn them off. Will cause the vehicle to go into regen more often for starters.
 

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So, if there ever is a delete kit for DPF it will be OK to idle the engine then? What about just the engine, is it problem in the long term?
 

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Yes you will have premature DPF failure, excessive EGR coking. Long term will cause the engine to dust itself, worn rings all kinds of fun stuff
 

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So, if there ever is a delete kit for DPF it will be OK to idle the engine then? What about just the engine, is it problem in the long term?
Aside from idling not being the best use of the engine/fuel, would think that the issues that would be present with a DPF would be gone without it.

The concern is excessive idling as the DPF goes. The issue can be worse if there is excessive idling along with regen cycles not completing. That's why when you detect a regen cycle, it's important continue to operate the vehicle until it has completed. Today's diesels certainly aren't designed for sitting in traffic, but anybody who has spent a night in their RV in a Walmart parking lot can attest to the fact that truckers run their diesels all night--with a DPF or not! But they will be hitting the road the next day and get those EGTs up.
 

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Aside from idling not being the best use of the engine/fuel, would think that the issues that would be present with a DPF would be gone without it.

The concern is excessive idling as the DPF goes. The issue can be worse if there is excessive idling along with regen cycles not completing. That's why when you detect a regen cycle, it's important continue to operate the vehicle until it has completed. Today's diesels certainly aren't designed for sitting in traffic, but anybody who has spent a night in their RV in a Walmart parking lot can attest to the fact that truckers run their diesels all night--with a DPF or not! But they will be hitting the road the next day and get those EGTs up.


Two things. Large diesels can initiate a regen on command so the DPF is kind of a non-issue in those vehicles. Since you can't in ours, exhaust temps are critical to maintain system integrity.


Second, Cummins has always recommended avoiding long periods of idling due to cylinder wash in the smaller engines. Granted, the XD has a smarter computer managing fuel delivery and supposedly better injection system. My Titan warms up faster than the 5.9L did, but I haven't gone through a 0* winter yet, either. The XD owners manual diesel supplement says to avoid excessive idling, but it refers to that in the engine break in section. I'll avoid it just because of my experience with the last Cummins engine.


MB
 
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