my radiator got busted 2 days ago. nag ka leak sa ilalim 2 weeks after i had it overhauled. now i cant use the car drive it to a shop to have my radiator replaced kase pag labas ko pa lang ng garahe ubos na agad tubig. So now im forced to change it myself. hingi lang sana ako ng tips and advise if there are things that i should look out for or keep in mind when installing a new radiator in order for me to do it correctly. For one, do i really need to put sealant before installing the hoses and if so where do i put it? sa hose ba o pagkakabitan? another is do i need to flush ung daanan ng tubig sa engine before installing the new rad?

I have managed to remove the radiator and hoses this morning and will be buying a new one soon. 92 honda civic hatch manual ph12 engine.

any tips and advise would be a great help. thanks