Frequent Failure of Auxiliary Engines and Their Turbochargers

All three Aux engine's failure & T/C deterioration. A Panama geared vessel with Yammer 6N18 Aux engines were getting failed frequently. Failure of turbochargers, frequent replacement of cylinder heads were necessitated. It was found that the fuel valve testing pressure gauge had +50kg/sq.cm error. All 18 fuel valves were tested with wrong gauge and put into use which led to failure of engines & T/C.