We at Constellation Marine Services
were appointed by the Hull and Machinery underwriters
to investigate and factually report upon cause, extent,
and mature of engine damage reported on small craft
The below narrative leads us to the damage of port side main propulsion engine of pilot boat underwritten by our client, the insurer.
Fact of Incident
While proceeding with the pilot the pilot boat skipper heard unusual noise coming from the engine room. It was further noticed that port engine temperature had reached 90 degrees on the panel. He requested the motorman to have a look in the engine room. The motorman had observed that cooling water was coming out from the exhaust manifold.
The skipper of the pilot boat stopped the port engine immediately and proceeded to the jetty with one engine that is the starboard engine.
The boat was insured. The Superintendent of the boat, owning the company got in touch with the underwriters to the boat. The underwriters got in touch with Constellation Marine Services LLC to investigate the cause, nature and extent of damage.
Independent Surveyor’s Appointment:
As soon as we received information from the underwriters, we proceeded to the repair workshop where the engine was dismantled. It was observed that the engine was completely dismantled. We observed extensive damage to the engine. It was noted that the engine was of 6 cylinders and 4-stroke type.
Details of the extensive damages observed
were as follows:
1. Cylinder liners: All 6-cylinder liners were with scoring marks and internal crack with water leaking.
2. Cylinder heads: No.2,3,4,5 and 6 noted with cracks between the narrow area between the valves
3. Exhaust manifold :Water jacket area with internal crack and water leak
4. Pistons: All 6 pistons with scoring marks and rings in no.6 piston stuck and burnt.
Based on the scrutiny of the above we requested the
boat company to make available the following documents
1. Statement of the master and crew of the vessel.
2 .Maintenance records for one year prior to the incident.
3. Manufacturer’s recommended periodical chart
4 .Last two lub oil analysis report.
5 .Engine running hours
6. Estimate and detailed damage report from the repairers.
7 .Latest survey report from class.
Based on the above, we revert our findings as follows,
The water from the water chamber due to the crack in the exhaust manifold casing entered the gas chamber of the exhaust manifold casing from where it percolated to various units .From the units the water went downwards into the oil sump ,causing the water to mix with lube oil affecting its lubricity and causing the sump level to rise.
The lack of lubricity of the lube oil affected the lubrication of moving parts causing damage to piston, piston rings, cylinder liner and the bearings.
We at Constellation have the experience in doing
engine damage surveys. The company has done numerous
engine damage surveys. We have a total of approximately
25000 nominations (all put together since inception).
Our professionalism has resulted in a satisfactory clientele
by our independent honest & unbiased factual findings
without opinions unless technically inclined & explicitly
asked for our clients. We respond quickly to the needs
of our clients. Most of our offices at Dubai, Fujairah,
Abu Dhabi, London, and Singapore are with closed proximity
to the port including our liaison offices at Germany,
The Netherlands, China, Philippines, West and South
Call us on +97144518060/+97144232884 or e-mail us on [email protected] to get a quick assessment or phone consultancy.