The injection pump on my friends truck is leaking oil like crazy. It apears to be coming from the back of the pump like around were you go into adjust the gov arm? were could it be coming from and how would one go about fixing it?

 

There are two flat head screws on the back, either use some gasket maker (RTV) or buy gasket material and make your own because I doubt you can buy one very easily. Its just a pain to get to and there is not much room.