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

Ive got a problem and need help!!

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Old Mar 28, 2010 | 12:04 AM
  #11  
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i had mine start knocking once. when you push clutch in no knock. turned out I broke the thrust main bearing. the knock came from about the middle of the engine too
 
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Old Mar 28, 2010 | 01:44 PM
  #12  
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Mine had a hellish knock with heavy grey smoke. The #4 injector had been hit by something and is smashed to pieces. I won't know for sure until the head comes off, but I'm postive I dropped my intake valve.
 
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Old Mar 28, 2010 | 08:13 PM
  #13  
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I tryed putting that injector back in and torqued it and still the same o knock.... now im in the process off pulling the motor.....so we are about to see whats wrong... the first thing im gonna do is pull the head and check the top of the pistons and cylinders hoping to find something there...but im expecting something more like haymafia had... ill try to keep yall updated the best i can....

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Thank yall so much O just wondering how hard is it to get the motor up high enough to clear the crossmember? It dont seem like there is enough height at the back lift point to clear it? Havent got there yet but just wondering?? Thank yall
 

Last edited by dixieland1519; Mar 28, 2010 at 08:13 PM. Reason: Automerged Doublepost
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Old Mar 28, 2010 | 08:43 PM
  #14  
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I cant remember wat haymafia did to pull his out. i think if i remember right though he dropped his oil pan.
 
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Old Mar 29, 2010 | 06:39 AM
  #15  
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i would have those injectors tested before yanked the whole motor out
 
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Old Mar 29, 2010 | 12:02 PM
  #16  
94 12valve's Avatar
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Originally Posted by dixieland1519
I tryed putting that injector back in and torqued it and still the same o knock.... now im in the process off pulling the motor.....so we are about to see whats wrong... the first thing im gonna do is pull the head and check the top of the pistons and cylinders hoping to find something there...but im expecting something more like haymafia had... ill try to keep yall updated the best i can....

---AutoMerged DoublePost---

Thank yall so much O just wondering how hard is it to get the motor up high enough to clear the crossmember? It dont seem like there is enough height at the back lift point to clear it? Havent got there yet but just wondering?? Thank yall
take the head off first ... it makes pulling the motor way easier.
 
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Old Mar 29, 2010 | 12:29 PM
  #17  
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pulling the head off i hadnt even considered that...that would help out alot thanks buddy.. well i plan on going back with a new set of injectors this time i just dont kno what to go with...the guy at sdx said theyre injectors was on hold for some reason...

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This old motor could use freshen up anyways so im gonna pull it out.... yea i had thought about pulling tha oil pan but wouldnt sure itd even clear then?....
 

Last edited by dixieland1519; Mar 29, 2010 at 12:29 PM. Reason: Automerged Doublepost
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Old Mar 29, 2010 | 01:28 PM
  #18  
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Originally Posted by dixieland1519
pulling the head off i hadnt even considered that...that would help out alot thanks buddy.. well i plan on going back with a new set of injectors this time i just dont kno what to go with...the guy at sdx said theyre injectors was on hold for some reason...

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This old motor could use freshen up anyways so im gonna pull it out.... yea i had thought about pulling tha oil pan but wouldnt sure itd even clear then?....
I found out the hard way that its easier to pull the head first

about droping the oil pan, I think it would give you the room you need but it would be a pain to get back on.

after you get the head off all thats left are 2 motor mounts and the bellhousing.
 
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Old Mar 30, 2010 | 09:50 PM
  #19  
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Well i got my motor part off the way apart and so far we have found #4 piston oiler in the oil pan and the piston was scored.... it aint bad enough you can hang your fingernail in so im hoping that my block aint hurt.... but thats the only piston that i have out right now....tommorrow im gonna take the rest of them out and check them but they look fine looking at them in the block... man i wish that it was just a injector that had come apart

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Originally Posted by 94 12valve
I found out the hard way that its easier to pull the head first

about droping the oil pan, I think it would give you the room you need but it would be a pain to get back on.

after you get the head off all thats left are 2 motor mounts and the bellhousing.
I tell ya what pulling the head is the only way to go it was easy!Thank you
 

Last edited by dixieland1519; Mar 30, 2010 at 09:50 PM. Reason: Automerged Doublepost
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Old Mar 30, 2010 | 11:13 PM
  #20  
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no problem
 
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