Depending on how much water you got into the engine you could have irreversible internal component damage. I would start by removing all of the spark plugs and then try to crank the motor. If you are hearing knocking noises at this point it is barely worth putting the spark plugs back in the motor as it is blown. If you hear no knocking while clearing the water out of the cylinders reinstall the spark plugs and try to start it momentarily (DO NOT LET IT STAY RUNNING). If you still have no engine noise I would proceed to a oil change. At any point if it is knocking or refusing to turn over normally with the plugs out you can count on a bent connecting rod or bent crankshaft. Hope this was of help to you.
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The answer to this question really depends on just how long and how deep the car was submerged.
was the water over the hood?
aprox how long was it underwater?
did you attempt to run it after getting it out of the water?
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