 Your car is a several hundred horsepower shop vac with a bigger air intake. It can suck up way more water way faster. And it only takes about a quarter of a cup to destroy an engine because they're so tight inside. You get it in there, it higher locks it at the minimum. You might bend some valves or bend a connecting rod or break a piston. Internal damage is going to cause you to replace the engine or take it apart permanently.