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

what year has the best 12v for engine swap

Old May 26, 2009 | 09:04 AM
  #11  
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i foundout yesterday when i went and paid for it that the motor has 235,007 miles do yall think i should go a head and rebuild it while its out or should it have another 100,000+ miles before i should have to do anything.

also as much as i would like to throw every bomb that i can on/in it while its out i cant cuz i dont have that much money so is there anything that i should fixor look for while its out, ie. the killer dowel pin(not sure if all 12v's had it or just certain years) if so what/where are they and how do i fix'em?
 
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Old May 26, 2009 | 09:43 AM
  #12  
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all 12 valves have that problem. Did I email you back? I was wasted for a couple days straight and had 3 people asking about it and got mixed up.
On the rebuild, the motor should still be good, but if you have the money to overhaul it, it wouldn't be a bad idea. You could compression test it too.
Once you get it in the truck, get the timing set again, the P pump looses timing over time and it'll save you some trouble, I spent about a month trying to get mine running right until I learned about that.

Here's a good writeup for the KDP:
https://www.dieselbombers.com/cummin...l-pin-fix.html
 
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Old May 26, 2009 | 10:41 AM
  #13  
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^^^^^ no you never replied.
thanks for the link and all the help.
 
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Old May 26, 2009 | 10:49 AM
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My dad's 97 was rebuilt at 250k because the turbo twisted the shaft off. THe bearings looked pretty damned good an the cylinder walls still had the cross hatching in them. Just do a compression test and if everything checks out run it.

And like FastCR said I would check and probably bumb the timing up a bit while its out. I mean if your going to bomb it your gonna do it anyways. Might as well do it while its easy to get to.
 
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Old May 26, 2009 | 11:18 AM
  #15  
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The KDP is also an issue for 24V trucks as well.


More KDP stuff - there is 2 porcedures - 1 involves making a tab to retain the pin and another involved using a jig to drill the timing case and using a set screw (I believe) to retain the pin. Both can be seen here:

Ram Diesel KDP retainer

Ram Diesel KDP retainer
 
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Old May 28, 2009 | 10:30 AM
  #16  
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anybody know where i can get a wiring diagram for my swap?
i got the motor yesterday and its got all the wires and i got the ecm i believe (the silverbox behind the pass. fender) anyways i need to know which wires to keep and which ones to discard.

thanks for all the help guys
 
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Old May 28, 2009 | 10:32 AM
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haynes manual.

Keep that biatch. Then you don't have to afro the voltage regulator and grid heater.
 
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Old May 28, 2009 | 11:16 AM
  #18  
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ok thats what i thought didnt know if haynes or chilton would be better.
 
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Old May 28, 2009 | 11:39 AM
  #19  
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From my experience the haynes has a lot more complete wiring diagrams in it.
 
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Old May 28, 2009 | 11:58 PM
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Originally Posted by FastCR
From my experience the haynes has a lot more complete wiring diagrams in it.
haynes aint worth a damn compaired to a ram truck factory service manual. the hains book is a childs book compaired to this novel, get the cd version off ebay for $30 or paper back for $100
 
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