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-   -   pump question. (https://www.dieselbombers.com/12-valve-2nd-gen-dodge-cummins-94-98/39202-pump-question.html)

monster12valve 12-26-2009 09:12 PM

pump question.
 
is the injection pump lubed by engine oil or diesel fuel? i pulled the fuel plate out today and and it had what seems to be engine oil all over it.....is this normal?

cumminsCrazy 12-26-2009 10:14 PM

P-pump is engine oil lubed i think thats why they last so long in my opinion

yellow12v 12-27-2009 12:36 AM

runs off the camshaft gear bro, just like everything else. engine oil.

12vcummins96 12-27-2009 07:50 AM

the plungers in it are lubed by diesel but the govenor ass and the other moving parts are engine oil

94 12valve 12-27-2009 09:18 AM


Originally Posted by hotcummins (Post 459073)
the plungers in it are lubed by diesel but the govenor ass and the other moving parts are engine oil

^^^ yep its lubed by both

monster12valve 12-27-2009 09:38 AM

thank you guys:c:

12 valve newby 02-14-2010 02:52 PM

new to the 12 valves
 
ok i got a few questions also i just bought a 97 12 valve and trying to do a few cheap mods to it at first i messed with the star wheel and wasnt happy so i took out the fuel plate out with me taking the fuel plate out and not turning the star wheel back. does that mess everything up as in make it run rough?

94 12valve 02-14-2010 03:16 PM

it won't mess anything up ... it will just smoke like a train on the low end and run slightly better on the top

12 valve newby 02-14-2010 06:26 PM

but then how comes about 2000 rpms it kinda feels like it falls on its face...

dshane62 02-14-2010 06:38 PM

ya need the 3gsk mod to the gov. but as far as falling on face at 2000 rpm i would check
the fuel filters and fuel pressure could be lift pump


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