“Hydrolocked,” refers to the internal movement of an engine is stopped because of the presence of fluid over the pistons or other parts.

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Because fluid, generally is incompressible, the piston inside this cylinder gets stopped from reaching the end of the stroke. The effect is that it “locks” the engine’s rotating assembly which prevents future motion.

The primary cause for hydrolock is an accidental introduction of water into engine’s cylinders. However it is also possible that it is also possible that the loss of coolant to an engine because of a mechanical issue, may be a cause for creating a condition known as a hydrolock.

The issue of hydrolock may be present within engines at rest and running dependent on the specific circumstance. In engines that are running the sudden onset of hydrolock can result in stalling, typically with the cost of various internal components.

However trying to ignite an engine that is hydrolocked, which has been inactive for a while and is usually unproductive.

If an engine is unable to stop it is not uncommon to have a variety of internal components to be damaged. On rare occasions an engine might be able to hydrolock with no apparent damage.

In general the amount of damage that hydrolock causes will be directly related to the velocity of the engine at which the process of hydrolocking begins. The higher the speed of an engine is, the more destructive the effects of hydrolock are typically.

Any damage that occurs during the time an engine is locked up results from the abrupt shutdown of mechanical components which were operating at a high speed for a few seconds earlier.

The energy of an engine’s rotating system is typically taken up by the weakest component, and the entire assembly is brought to a sudden stop. This can alter or destroy the particular component(s) that are at risk.

Here are a few of the most frequent types of damages that are observed in hydrolock.

• Broken or bent connecting rods
• The piston and connecting rod are ejected.
• Cracked cylinder head
• Cracked wall of cylinder
• Damaged crankshaft
• Infected bearings