1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

cummins teardown

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Old 08-14-2012, 07:44 AM
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Im picking up my 1990 cummins for my ford swap this payday, I am taking head to get machine work but upovoly it only has 80k on it, my question is when I have it all tore down can I micke. The rings to see if they need replaced? If so when I put new rings on if it needs them do I do the same 45 degree ratio as gas engine?
 
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Old 08-14-2012, 08:54 AM
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Just replace them tolerance for rings and piston to cylinder on these is very tight. And they go 120*

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Old 08-14-2012, 08:05 PM
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So put the bottom ring with the gap forward and each one that goes on top do 120 degrees clockwise from that one
 
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Old 08-14-2012, 08:51 PM
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Yep..
 
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Old 08-15-2012, 07:48 AM
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Im not stopping till I have atleast 500 rwh I've seen are rod bolts are those worth there money or does stocks hold up just fine unless your runner like 1500 pounds of torque?
 
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