Balancer shaft chain sprocket failure
This is by far the most common issue we have come across when it comes to this specific engine type. The failure of this sprocket ultimately leads to the loss of oil pressure with potential catastrophic engine damage as a result. Early signs of a sprocket that is about to fail are vibrations on low engine revs. Theese vibrations can also occure sporadicly due to the sprocket slipping on the balancer shaft.