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

Fuel Getting In AFC

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Old Apr 8, 2012 | 08:45 PM
  #1  
Cummins12Club's Avatar
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From: Northern Kentucky
Default Fuel Getting In AFC

i have a 93 cummins that i swaped the pump top on today, the top i put on was from an 89 truck, it got a 4k gov spring and denny t fuel pin, anyways, after finishing the swap the truck ran awsome, but was squirting fuel out of the vent looking piece on the back of the afc just above the return line, and when i pulled the afc cover back off it had fuel in it, it wasnt filled to the top but had enough to where it was shooting out of that vent like a guiser, upon furter inspection i noticed someone had filled the vent up w/ sylicone to keep it from leaking, but i know fuel should never enter the afc, does anyone have a clue as to what the problem is? and will i have to start over and get another pump top, thanks!
 
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Old Apr 8, 2012 | 08:58 PM
  #2  
moparbubbabt59l's Avatar
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From: smyrna de
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Fuel pin oring is leaking. The guide pin that rides on the fuel pin o ring is leaking

Sent from my DROIDX
 
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Old Jun 4, 2012 | 10:08 PM
  #3  
F-350a'cummin's Avatar
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where can you order a new o-ring, i have the same problem
 
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Old Jun 4, 2012 | 10:53 PM
  #4  
BC847's Avatar
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From: In an old bus, down
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Originally Posted by F-350a'cummin
where can you order a new o-ring, i have the same problem
GASKET KIT, REBUILD KIT Dodge Cummins VE Injection Pump 5.9 Diesel | eBay

GASKET REBUILD KIT for Dodge Cummins Bosch VE Injection Pump 5.9 Diesel | eBay

Or similar.
 
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Old Jun 5, 2012 | 06:29 PM
  #5  
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it will probably keep leaking with a denny t since that small pin seems to come out past the oring with the deep cut.
 
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Old Jun 19, 2012 | 11:05 AM
  #6  
F-350a'cummin's Avatar
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not to highjack a post but this is the only option i got.. i havnt been on bombers long, how do i leave a post
 
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