DO NOT overtorque the bolts that hold down the injectors or for that matter a glow plug. the ONLY way to fix it is to NOT tighten it, but to remove it completely, sand the mating surface where the copper washer goes, sand down the copper washer or replace the washer. a leak will only get worse, smoke or fuel. you can easily destroy the threads/ hold downs/ or the injector body or the pivot arm if you even think about putting a bit more than what's called for with a torque wrench. DO NOT MANUALLY TIGHTEN IT. or your probably going to crack or strip out the threads or damage the head.
My suggestion is to remove the leaking whatevers, clean things up and fix the leak and check for cracks. follow the write ups for it.
BUy a used old K cable, the new ones have limited VIN #s and are $$$$. either way a used is by far cheaper. You can hack the ebay fake cables for basic tools like timing and IQ and a few things but its spotty at best.
the oil will always have a lot of blowby though. If things are not working properly, a leak down test and a compression test will diagnose any internal issues.