12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

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  #11  
Old 05-01-2009, 11:29 AM
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YEAH BUT I THINK YOU COULD USE THE SAME PROCEEDURE TO SPEED THAT UP.
 
  #12  
Old 05-01-2009, 11:34 AM
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When I bought my truck new, the owners manual said there was no real "break-in" process for the engine. It specified no hard work for the first 500 miles for the axles to break-in, but after that,the truck should actually be worked (pulling trailers and such) to get everything to seat. In all actuality, it can take as many as 20,000 miles to fully break-in a 5.9L Cummins.

You can also go here:http://www.cummins.com/cmi/content.j...33&menuIndex=0 and contact Cummins directly either by phone or email and see what the experts say.
 
  #13  
Old 05-01-2009, 02:09 PM
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oh sweet deal. i thing 35 inch tires and hauling the boat is a mild load on the engine, maybe that will help it.
 
  #14  
Old 05-01-2009, 03:39 PM
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Why would you baby a new rebuilt engine????? I worked for a over the road truck shop and after a rebuild you would start the truck drive it over to the dyno, strap it down and as the engine warmed we increased the load and would run it at full throtal for atleast a hour.
Same thing when I was in college I overhauled one of my tractors. After getting the tractor running I hooked it up to a PTO dyno and ran full power for almost 3 hours.

I was told that if you want a oil burner let the engine idle with a light load.
 
  #15  
Old 05-01-2009, 03:43 PM
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i just got off the phone with cummins and they said the same thing so im going to hook her up to a trailer today and hit the road, i dont want no oil burner at all i want it running the same way it did before it melted a piston.
 
  #16  
Old 05-01-2009, 04:35 PM
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the guys at schied diesel, start there motors and let them warm up and then it's full throttle "*** OR BLEED" it will either be right and hold together, CUMMAPART.
 

Last edited by chevycummins1@yahoo.com; 05-01-2009 at 04:36 PM. Reason: typo
  #17  
Old 05-01-2009, 05:51 PM
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Originally Posted by 94cummins12v
i just got off the phone with cummins and they said the same thing so im going to hook her up to a trailer today and hit the road, i dont want no oil burner at all i want it running the same way it did before it melted a piston.
Cool deal. I have a feeling the only smoke coming from the exhaust will be black real soon.
 
  #18  
Old 05-01-2009, 10:41 PM
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well i drove it today and dint hold anything back with it, freway at 70mph threw town punched it poring the soot and evreything so ill keep that up for awhile and see if it gets better
 
  #19  
Old 05-02-2009, 01:32 AM
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yup, babying it is not going to help things at all!


Like mentioned before, as these engines come off the MFG line they are strapped to the dyno fired up and once everything checks out they hit WOT!

One thing you REALLY dont want to do is leave it idling too long, the risk and effect of cylinder wash is much greater while the rings are still seating.
 
  #20  
Old 05-02-2009, 09:35 AM
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ok that makes sense, ill only let it idle for the first 5 minutes to warm it up but ill idle it at about 1200rpm, what about boost is there any specific number to keep it under while breakin, i can hit 45lbs with this turbo
 



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