Has anyone experienced this kind of failure on a piston, as seen in the pictures? This is a piston we pulled out today from a 16 645 EMD two stroke engine - non turbo. I can't figure out what caused this or where the pieces went. The engine was run for a considerable amount of time after this mishap (which manifested itself by a large fireball coming out the stack) without complaints - so I am told. The engine has 16,000 hrs on it. The only thing we found suspicious was a broken fuel injector on the opposite side of the engine, but on the same crank throw. Very strange - any ideas.
The funny thing is I had done a scavenge space check, a mere two weeks before the failure, and all the rings were ok at that time.
Piston - may you rest in pieces
- The Dieselduck
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Piston - may you rest in pieces
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- 2009.01.21-WJM-EMD16645-unit4.03.jpg (103.41 KiB) Viewed 4349 times
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Martin Leduc
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- D Winsor
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Re: Piston - may you rest in pieces
Looks as if there was a loss of piston cooling oil, resulting in an overheated and cracked crown which allowed oil to enter the cylinder (Note pieces missing from between the ring grooves).
I experienced a similar failure on a Fairbanks Morse piston as the result of a loss of piston cooling caused by a turned bearing.
I would be checking the oil flow to the bottom end and crown asap!!!
I experienced a similar failure on a Fairbanks Morse piston as the result of a loss of piston cooling caused by a turned bearing.
I would be checking the oil flow to the bottom end and crown asap!!!
Troubleshooting 101 "Don't over think it - K.I.S.S. it"
- ArkSeaJumper
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Re: Piston - may you rest in pieces
From the looks of the top of the crown, I would say all broken parts are dust. all the edges are worn round. Anyway the normal place I find all the bits of an engine are jamed up in a recently fucked turbo.
The top of the crown looks cracked, how are the valve (s) ??
The top of the crown looks cracked, how are the valve (s) ??