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Old 09-06-2011, 12:04 PM   #1
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Cummins Diesel Break In

I bit the bullet and bought a new 2011 Dodge 2500 Diesel truck. Has 30 miles, the dealer told me to drive @ least 500 miles before towing.

How did you break in your new diesel trucks. Do you use any fuel additives?

I can hardly wait to tow my Eagle 322FKS with this truck. Have towed with a 6 liter gas in the past, did Ok,.
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Old 09-06-2011, 02:56 PM   #2
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Congratulations on the new truck. The Cummins part dosen't need any breakin (that takes around 30K miles). The drive train probably needs a little wear in time.

Do not use any additives as they may clog the DPF filter on your exhaust. The DPF is a large $1500 muffler. Also don't let it idle for extended periods of time as that will soot up the DPF.
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Old 09-06-2011, 03:08 PM   #3
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I have a 2010 Dodge diesel Laramie 3500 and was told you do not have to have to break it in and I didn't. I use additives in my fuel and it gives me better mileage. If the filter does clog the engine will clear itself and show you on the front display.
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Old 09-06-2011, 03:29 PM   #4
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Usually the mfgr's recommendations on the break in before towing is so that the ring and pinion gears in the rear axle have a chance to wear into each other before applying a heavy towing load.
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Old 09-06-2011, 03:54 PM   #5
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Congrats on your Cummins! Yes you need to run an additive because the ultra low sulfur diesel does not have the same lubricating characteristics as the old diesel, and is hard on the injectors. also if you turn on your exhaust break everytime you start it and use it all the time this will help keep the DPF clear, the best thing to do is drive it!
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Old 09-06-2011, 10:06 PM   #6
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If you use an additive be sure to use the one that Cummins recommends.
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Old 09-06-2011, 10:39 PM   #7
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Check out this study.

http://www.motormayhem.net/wp-upload...-version-3.pdf


It should answer a lot of your questions.
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Old 09-07-2011, 05:56 AM   #8
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Thumbs up Thanks for the help

Thanks for the responses. This is my first Diesel truck. Great to have the input from all us Jayco owners, no matter what the subject!
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Old 09-07-2011, 09:12 AM   #9
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Take it on a solo highway trip of a few hundred miles .. Vary the speed never more than 10 min at one speed 60 mph then 70 then 55 ..you get the idea... its the best break in you can do
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Old 09-07-2011, 10:10 AM   #10
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----> wishes my F150 could grow up to be a Cummins Diesel <----

Congrats Buckeye!
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Old 09-07-2011, 11:13 AM   #11
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I was told to do just what Seann45 said vary the speed and not to tow for the first 500 miles. then they said to drive it like you stole it.
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Old 09-13-2011, 03:32 AM   #12
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I bought a new Dodge 2500 4x2 quadcab 6spd manual diesel truck in 2008. The second week I had it I pulled my 26bh across VA, WV into western KY. 700 miles. Stayed in the left lane 70-75mph no WD or sway hooked up. That truck was awesome. It laughed at the mountains in WV and pulled my 7500lb trailer like a dream. I now have a 97 suburban and it could never perform like that Dodge.
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Old 09-13-2011, 08:03 AM   #13
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I sure like how Cummins has quieted down the engine compared to prior years.

This may be just me.., but on all my new vehicles I changed the engine oil & filter after the first 500 miles just to flush out any unwanted particles from the initial break-in, and/or the manufacturing process.

Also, check the rear axle differential fluid (and front if 4x4) as well. My rear axle fluid was dirty at 500 miles and had it changed as well. The front axle fluid was fine, but I changed it anyways.

I've spent a lot of time over the years in automotive drive train plants (engine, transmission, axle, etc.) and found anytime there is metal cutting (gears, etc.) going on there is always the potential of some metal chips getting carried into final assembly (axles and ring gears were the worst offenders).

Just food for thought.

Bob
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Old 09-23-2011, 08:04 AM   #14
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I own a 2010 Dodge Ram with the 6.7 Cummings. My dealership told me to run 500 miles before towing of which I did. I have 17,000 miles on it now and have had no problems. I have not added any additives to the fuel, always use low sulpher. My gas station puts in the proper additives for cold winter driving as I live in the U.P. of Michigan. They show what temp the fuel is rated for on the pump by months during the colder season. My truck sits outside during the winter as I have no garage and I've never used the engine heater. My remote starter automatically delays starting to allow plugs to warm up and works the same as manually starting it. Great truck so far.
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Old 09-23-2011, 09:12 AM   #15
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All the above is good information. Just work that truck or it will have issues. Majority of the issues with Cummins is from folks who drive to store once a week or take short trips. That engine is not designed for such use. I got my 3500 last October and pull the 365BHS. With 48K under my belt and working that engine, it performs flawlessly. I even think she smiles when I take her over the mountains.
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Old 09-23-2011, 10:45 AM   #16
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" Majority of the issues with Cummins is from folks who drive to store once a week or take short trips."

I think this is true of most diesels. They were made to run, not sit or just take 5 mile trips.
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Old 09-23-2011, 11:50 AM   #17
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I have a friend that bought a brand new Dodge/Cummins just because he wanted a big truck...no RV, nothing to pull behind it, just wanted to own a big truck. He drove his company pickup most of the time and let his wife drive a mile to work and a mile back every day in the Dodge. After about 55,000 miles the Cummins was toast. I don't remember what he said happened to the diesel but a contributing factor was the short trips back and forth, never getting it to operating temps except for some rare highway trips he made a few times a year.
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