When will naruto find out the fourth is his father?

He founds out that his father is the fourth Hokage in Naruto: Shippuuden episode 168.
he will know that the fourth was his father, the fourth will appear to narutos mind when he is about to release the seal and free the demon fox ( this is during his fight with pain/nagato were he reached 8 tails ) there he will know that he is the son of the 4th hokage of the hidden leaf......read the naruto chapter 439 at www.onemanga.com!! read and discover it by yourself. ok!!

john benedick c. carbonell