These are some possible reasons an engine could be locked up.

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• Oil shortage
• Insufficient circulation
• Inadequacy of use
• Hydro lock
• Vapor lock

You may be able add oil to the engine if there is no oil. This is unlikely to solve the problem as the engine’s structural problems are likely already being caused by the absence of oil. Your engine wouldn’t have locked up if it wasn’t for the oil.

It is safe to say that you will need to make extensive repairs if your engine locks up while you are driving. The damage was severe enough to cause you to be unable to drive the car, and the fact that it was suddenly stopped while you were driving will only make matters worse.

If your engine is stuck for too long, and then locks up, you might be able to fix the problem by soaking it in oil for several days. However, make sure you remove the spark plugs before adding the oil. A breaker bar may be used to turn the engine over. It will determine whether or not the engine is still running.

To start a hydro locked engine, detach the spark plugs. The engine should thereafter be able to resume regular operation. This will only work if the damage is minor or non-existent. Most cases will have damaged parts that need to be repaired.

If your engine is vapor locked, allow it to cool down so that the fuel can return to liquid form. You can spray cold water on the lines and fuel pump, or put some ice on it if you have a short time.

The extent of damage to your engine will determine the cost of repairs. It is possible to fix the issue with very little effort. It may be as simple as changing the spark plugs and oil. You may have to pay up to $1500 for a new fuel pump. In extreme cases, your options are to either purchase a new engine that costs thousands of dollars, or have your mechanic rebuild it for you, which can be equally expensive.