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Old 07-29-2007, 11:06 AM   #1
DieselMonk
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How do YOU break in your diesel engine?

I'd like to know from everybody how they break-in their new diesels ?
Some break them in "hard" others baby them... so what's better to to? :evil:
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Old 07-29-2007, 01:33 PM   #2
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When we got our 2006 f-250 i took it out that night and dogged the crap out of it...Problems to date 2 bad injectors, LPOP and HPOP under warranty and now head gaskets...all this at 150k miles and driven hard since day 1.:-)
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Old 07-29-2007, 02:39 PM   #3
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Did you want to make this into a poll?


I've believed that you should drive a vehicle hard right from the get-go, ever since my Dad told me a story about their Airport Authority Cars.
They had two identical Olds Cutlasses. One was driven up north and back at high speeds soon after it was bought. The other toiled at the airport, not driven hard at all. This second car was a total dog. But the first one ran like a raped ape and had more get-up than you'd believe a 2bbl 350 should have. I should know, because I got that car from my dad when I turned 16 and drove it all through high school. Maybe I'm FOS, but thats what I believe.

I'd do the first oil change on a shorter interval, though. Maybe around 1000 miles.
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Old 07-29-2007, 09:56 PM   #4
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Well the owners manual on the d max says dont tow for first 500 miles. When installing all jasper engines they said dont beat it dont baby it. Dont get out ont he highway and set the cruise but dont do all city driving either. Personally I know many trucks that are put to work from day one (companie drivers beat, pulling loads from day one), but personally I drove my new truck like normal, once and awhile id step on it, but fairly normal accelerations, mix of highway and city.
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Old 07-29-2007, 10:09 PM   #5
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For not towing the first 500 miles, is more for the rear end.

Run hard, keep idling to a minimum. Helps the rings seat in properly. Don't just set the cruise. Vary the engine speed some.

Pulling a trailer helps to break in the engine better, and quicker.
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Old 07-30-2007, 04:06 AM   #6
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I also was confused on the proper break in method so I took it easy for the first 100 miles and varied my speed, after that I would accelerate fully then bring it back down. I also made sure that I did not use any additves for the first 1500 miles.
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Old 07-30-2007, 11:43 PM   #7
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When I get a truck, it is ran hard from the very first turn of the key by me. I dont go full throttle all the time, but I get on it some. As stated before, change the oil at a 1/3 of recomended interval, then run it like you stole it.

And the setting of the rings, I read that when rebuilding a diesel. Run it down the road for the first time, punch it to 30MPH then let off, then punch it 40MPH let off, then punch it to 50MPH and let off. Has anyone else heard of this, it was in a old Chilton, and I do mean really old! Early 80's I think? (old for a diesel manual, dont get offended you old timers!)

Tony
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Old 07-31-2007, 01:19 AM   #8
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When i bought the truck I was at the dealership with a bullydog Power pup in my hand. I walked outside and downloaded it. I let it warm up for a few minutes and put the peddle to the floor
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Old 07-31-2007, 11:45 AM   #9
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Also for myself, I keep it a bit easy for the first 500mi then I'll get gradually to full throttle. There are so many people of breaking engines it differently, so I thought to see which way is the most prefferred one.
I put on the SuperChip and the dual exhaust on at 1000mi and have the tow/performance setting programmed (60hp). The enginge stopped giving better milage for about 2000mi until I hauled my 32ft camper around, then I ended up yesterday at 20mpg hand calculated and gained about 1.5 mpg at 6000mi.
A friend of mine has a 06 LBZ ext cab with 25000mi on it, never towed trailer, same mods done like my truck and get's worse fuel milage. :shrug:
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Old 08-04-2007, 08:23 PM   #10
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I just had a new motor put in mine because of a mechanics incompitence. I ran it pretty hard for the first 200 miles then I put my programer on it and let the smoke roll.
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