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Rings binding in the piston, usually due to a build-up of either combustion products or a breakdown of the lubricating oil, can cause engine failure and is a common cause of failure for diesel engines. [citation needed]
In most steam engine designs there is a short time at the end of the return stroke of the piston when all the valves are shut and it is compressing any remaining steam. Water can be introduced from the boiler or in a cold engine, steam will condense to water on the cool walls of the cylinders and can potentially hydrolock an engine.
Wind shear caused structural failure of the tail which damaged gas cells: 1943-08-01 1943 Lambert Field CG-4A crash St. Louis, United States Waco CG-4 [N 1] Manufacturing flaw 10 Loss of right-hand wing due to failure of defective wing strut fitting [1] 1947-10-24 United Airlines Flight 608: USA: about 1.5 Miles southeast of Bryce Canyon ...
Piston ring failures in #7 and #8 cylinders due to regeneration process. During regeneration, fuel is injected during the exhaust stroke in order to increase the exhaust temperature for DPF cleaning. This exposes the piston rings to excessive heat which eventually causes the piston rings to lose tension, causing low to no compression ...
Other than the piston rings, “blow-by” gases can push the fuel oil past the rings and into the crankcase. [1] “Blow-by” gases are a mix of fuel oil and exhaust gases that push past the piston rings. Crankcase dilution is caused more when the lube oil is fresher. [3] Another cause of crankcase dilution is a slow or delayed injection ...
Secondly, while breaking in newly installed piston rings, a minute amount of wear must occur between rings and cylinder wall in order to seat the rings properly, and ensure a gas-tight seal. If the cylinder walls are too smooth, this wear will not occur, with the rings "skating" over the polished surface.
Blow-by, as it is often called, is the result of combustion material from the combustion chamber "blowing" past the piston rings and into the crankcase. These blow-by gases, if not ventilated, inevitably condense and combine with the oil vapor present in the crankcase, forming oil sludge. Excessive crankcase pressure can furthermore lead to ...
Common causes of connecting rod failure are tensile failure from high engine speeds, the impact force when the piston hits a valve (due to a valvetrain problem), rod bearing failure (usually due to a lubrication problem), or incorrect installation of the connecting rod. [18] [19] [20] [21]