Question about minatos sealing.

[EliteKage]

Minato preset his chakra to activate when naruto was about to tear off the seal however and preset his mothers chakra to when naruto was learning how to control the ninetails.
ANd didn't naruto have to rip off the seal to control the ninetails so tell me how he knew and how this all works out

 

[Uchiha Shikiruire]

He didn't.

 

[Sabuto Hayashi]

Minato set his chakra to appear whenever the Kyuubi was about to break out. After awakening the 8th tail, Naruto was under the Kyuubi's influence and the seal would break forcefully, killing him and letting Kurama run free again.

When Naruto was training to control Kurama, he unlocked his seal manually. That time, he did it intentionally.

 

[YellowFlash1]

Minato had put Kushina's and his chakra inside naruto so that they could see him ones more when he was older.

Minato put his chakra to activate when Naruto was about to completely open undo the seal, so that Minato could repair it, however because he has a limited amount of chakra left to put in Naruto, he would only be able to see him that one time.

He places Kushina's chakra inside naruto, so that when the time came... She could help him take control over the 9 tail. Naruto was allowed to open the seal, because he was ready to fight (Chakra Pulling Contest)... When Naruto defeated him, he was able to access the 9 tails chakra..