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

Lift pump tick or not?

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Old Aug 23, 2009 | 08:31 PM
  #11  
94cummins12v's Avatar
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i know mine has been clicking for years with 265,000 miles i even replaced my can and fuel pump when i did the entire engine overhaul and the damn thing still makes the same click. turn up the idle and throw stacks on it and you wont here the click anymore
 
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Old Aug 23, 2009 | 10:21 PM
  #12  
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mine ticks and comes and goes depending on temperaure, more in winter then summer
 
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Old Aug 23, 2009 | 11:50 PM
  #13  
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its a diesel let her knock and tick all she wants as long as its running good then i wouldnt worry about it, if it aint broke dont kix it
 
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Old Aug 24, 2009 | 12:11 AM
  #14  
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12 valves are a noisy engine and it seems they all have a little different sound to them
 
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Old Aug 24, 2009 | 12:13 AM
  #15  
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you wont ever get 2 12v's to sound exactly identical, ive tried with mine and my budies truck with the same turbo, fuleing epgrades and exhaust, it aint happinen
 
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Old Feb 11, 2010 | 08:42 AM
  #16  
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Default THANK YOU !

I've been searching the forums about this clicking noise and this is the only one that has any info. Ripoff mechanic wanted to charge me $1200 blaming it on the DPD. It was too rythmic to me to be that. I was thinking valve or injector. Lifter pump cam makes more sense, and "aint broke dont fix" , sounds cheaper. Mine started at $140k miles.

Thanks again
 
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Old Feb 19, 2010 | 01:16 AM
  #17  
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I would say 80-90% on my fuel system(94 5 speed) has been replaced or rebuilt at 100k miles because of this ticking and other issues, shes still a ticker at 122k, but not as noisy of a motor as my 01.5 6 speed.
 
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Old Feb 19, 2010 | 03:45 AM
  #18  
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mine had the tic when i fist baught it and the first time i took it to 3000 rpms it went away. but yea its the lift pump or valve adjustment.

not trying to thread jack but can any of you guys post me a link on how to adjust the valves? thanks
 
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Old Feb 19, 2010 | 03:57 AM
  #19  
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its ten thousands and twenty thousands, intake and exhaust, you have to find top dead center then i dont remember?
 
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Old Feb 19, 2010 | 07:53 AM
  #20  
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so on the intake it should be ten thousandths, and on the exhaust twenty thousandths? is there any special method to it? thanks
 
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