05-15-2017 11:57 PM
Cat 3412 is becoming slow to start, this is because the oil pressure is taking a long time to build up.
Also we have just had a bore-scope done due to elevated oil consumption, after the injectors were replaced we could not start the engine and had to disconnect the suction pipe from the HEUI pump and manually fill with oil 3 times before it would start.
Is this normal?
Looking at the HEUI drawing (below) there are non return valves on the injector supply lines which should stop the oil draining out of the pump? So it would seem that these non return valves are not closing 100%?
Secondly at high load 70%+ we are consuming close to 2lt oil per 10hrs which is 4x normal oil consumption, bore-scope looked good no visible smoke, injectors were sooty, is it possible we are loosing oil through the HEUI system?