Hey there. I'm planning a P pump swap on my 91.5 i/c motor. I know I need the inner and outer gear covers, the p pump, and the fuel lines. (also wiring, fuel in and return and that little stuff too) Do I need to use the cam and/or cam gear from the p pump motor or will my cam and gear work?? Is there anything else I need?? I want to have everything ready before I tear down. any help would be great. Thanks!

 

https://www.dieselbombers.com/5-9l-r...-complete.html

 

Hey thanks for the overview!! Very detailed pics. you mentioned you broke 2 lift pumps, you think this was from using the 1st gen cam or just got unlucky with the parts??? I don't mind spending the extra cash on an airdog, i'm just curious. thanks again

 

I cant say for sure it was bad pumps. I dont know how i could have broken 2 of them though. The airdog is nice, especially when it come to priming, but whats more reliable? The airdog or a mechanical pump? Id stick with a mechanical one if you can. Maybe there is a difference in the cams? im not sure.

 

Yea it would be odd to have 2 bad pumps, but i've seen stuff like that happen before. I'd prefer to keep the pump mechanical, but I guess i'll do what I have to!!! thanks for your help and the quick replies. the sooner I figure all this out the sooner I can do my swap!!

Does anyone know if the 2nd gen cams will fit in the 1st gen blocks?? I looked at some aftermarkets and re-grids to see if they were different and they are listed as different part numbers. I'm wondering if the only difference is the drive for the lift pump??

 

12 valve cams are used in all 12 valve 5.9l Cummins engines, you can even use the 12 valve camshaft in a 24 valve 5.9l Cummins engine.