What causes low oil pressure and knocking sound on a Nissan RD28 turbo engine?
Dear Nissan- I hate to be the one to break this to you, and its news that you are not going to want to hear. The reason the turbo will not spin is because the bearings in the turbo have cooked and seized the turbo charger. This may have happened due to the low oil pressure. Ths indicates to me that the Oil Pump has failed or a critical seal in the system has failed. As for the knocking sound, I will also wager that you may have spun an engine bearing in the process. Automotive 101: Turbo Chargers are operated by the hot exhaust gasses exiting the engine. These gasses flow by the turbine vanes which is connected via a shaft to the compressor vanes that create the boost for the Turbo Charger. Since the timing failure due to a Timing Belt snapping or the belt cogs being stripped off, (if equipped) the engine jumped time and the valves smacked the top of the piston. The same will happen if a timing chain jumps time due to a sproket failure, chain failure, or tensioner failure. This destruc
