6BTA 5.9 250hp fuel lift pump

[Bradley Tiller]

I have attempted (unsuccessfully) to replace the piston style lift pump with the diaphragm type. The low pressure fuel line was damaged while attempting to reposition it to the new lift pump. It appears the line would have to be modified in order to attach it to the different (diaphragm) pump. 2 questions:

1. Can the diaphragm lift pump be used on this engine?

2. If so, is there a different fuel line made to attach to the diaphragm pump.

Topic

[Tony Athens]

Bradley,

I cannot answer that question, & I really doubt anyone else can either unless that someone tried it & was successful in the end….

For sure, threads, sizes, & connections have no particular pattern as to what is used with what, other than I doubt you can “Mix & Match”…

Next————-What exact CPL? If this is a EP9 injection system, then you are very off base trying to do this. That pump requires alot “more” than the diaphragm pump can put-out.. Think of the diaphragm pump as something that Cater made for a 283 Chevy V-8 in the 60’s..

The real question is WHY are you trying to “Mickey Mouse” something like this? The factory pumps are quite reliable and not expensive in the big scheme of things..

Tony

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