This morning I noticed my truck leaking diesel, looked under hood and found that the diesel primer pump was leaking with engine running. Has anyone seen this before? Can this be taken apart and O-rings changed? or what needs to be replaced?

 

complete lift pump needs replacing as far as I know. You can find them for around 100 bucks online, usually.

 

you have to replace the whole lift pump

 

went to local bearing shop with old seal they matched it up, cost $5 done. put it together real easy fix.