OK have new motor in and no start issue . I guess sitting cold meesed stuff up and just wear and tear on old parts . So replaced return lines and glowplugs with new controller and new wiring for glow plugs . Wouldn't start found out not getting fuel out of a few injectors so j pulled them and they are shot . I have good spares but now do you clean out where the injector goes without pulling the heads

 

This is how I changed a severely corroded injector.

After taking the necessary safety precautions and dissabling the engine and IP, I cleaned the injector line nut and injector area with solvent and I blew away the debris with compressed air. I broke the nut loose and cleaned with air and removed the nut. Cleaned the injector line connection with cleaner and clean soft cloth, covered with latex finger end. Loosened the injector and cleaned with compressed air as I went. Removed the injector and using a small 4 wire grabbing tool and piece of soft cloth I plugged injector hole as I cleaned the inner wall area and scraped around the copper gasket area, then cleaned with gentle air. Removed soft cloth and used pick to remove copper gasket, then cranked the engine to blow out any debris that might have fallen into the chamber. Installed injector.