3406e smoking on startup

Old cat motor started smoking really bad for about 5 minutes on startup (looked like a steam engine). Then ran fine with no smoke. Also had fuel coming out of the turbo gasket area. Assumed bad o- rings on injectors. Pulled injectors and found the bottom small o-rings either totally missing or turned to carbon. The middle o-ring on several injectors either cracked or broken. All the upper o-rings were still good. Also had several breaks in the insulation of the jake/injector wiring harness so pulled that out. I imagine the labor on all this is fairly ridiculous since the last time I paid for an injector replacement was $750 at cummins for an n14.

 

Just curious is it possible to pressurize the cooling system to check to see if the injector sleeves (cups) are leaking? Would that work or not?

 

Almost no idle time. Seeing as how I have obvious o-ring damage that would allow fuel to leak down into the cylinders I'm going with that first. The heat cycles and thermal expansion/contraction that occur allows for some interesting things to occur with such close tolerances and o-rings.

 

Was that labor only? I'm doing it myself