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Cat GEH220 Generator Starting problems

Hi

 

I have at GEH220 Genset with a starting problem.  We have confirmed correct fuel pressure and replaced the injector pressure regulator valve.  Injector oil pressure with diagnostic tool from the ECM is 343PSI.  Voltage during start is at regulator valve is 1.7V.  We swaped out the Pressure pump with no change.  External o-rings on the injectors all look good.  During start there is a small amount of oil coming from the rectangle shaped hole at the bottom of the silver plate (as in picture) on 3 of the injectors.  Our mechanic thinks this small leak is causing the pressure to bleed off enough to prevent a start.  Does anyone have any advice?

 

Thanks  Chris20170619_162109_resized.jpg