Is it ok if I add water to the radiator after I pour the antifreeze?

Yes, it's generally okay to add water to the radiator after pouring in antifreeze, especially if you're trying to achieve the correct coolant mixture. However, it’s best to follow the manufacturer’s recommended coolant ratio, typically 50% antifreeze and 50% water, to ensure optimal performance and protection against freezing and overheating. Make sure the engine is cool before adding any fluids, and check for leaks after filling.