Page 64 - CARILEC CE Industry Journal_Oct_2019

Fig. 32 - Engine Report

When the cylinder 1L head was removed on Engine E8, it being impacted, all were replaced and same head
could be seen that the piston crown had a polished ring re-installed with the correct 2 mm. After this
with no carbon on it indicating that the valves where maintenance, the engine noise was eliminated and peak
hitting the piston each scavenge stroke and as the piston pressure monitoring indicated the peak pressure was
crown rotated it kept a ring free of carbon. The valves also back to normal.
exhibited damage. Due to the damage to the valves from

Fig.33 - Vibration Signature showing the impact

Utilizing a comprehensive engine analyzer allows for the the higher and earlier peak pressure places more strain on
quick and reliable identification of a fault before the fault the bearings, more stress on the cooling and lube oil
creates a catastrophic failure. As these valves were systems as well. It is also very clear from this event that
constantly being impacted by the piston, the risk of a exhaust temperatures are not a reliable indicator of
valve failure (dropped valve) was very high. In addition, cylinder health and performance.

62 CE INDUSTRY Journal