How to identify the exhaust valve of main engine which stuck in open position and distinguish this condition from other possible failures?
29 Jul '19, 20:28
The ME exhaust valve which stuck in open position manifests itself by abnormally increasing exhaust temperatures. Before When the valve air spring start leaking due to damaged seals of air piston, normally, the knocking sound can be heard.
However, if the engine was started with exhaust valve stuck or valve stuck at low RPM, the combustion in a subject unit may not start due to lost compression. This condition can be determined by comparing a compression pressure of the unit with suspected exh valve failure and other normally operating units. If some cylinder suddenly lost a compression - most probably the exhaust valve stuck in open position.
29 Jul '19, 20:31