Hello, i want to flush my radiator and ad new coolant, now there is pink coolant in it but i m not sure that s the good one, when i google ; if find about green and orange coolant; dexcool,;;;; but it s still not clear to me wich one i should use and is it a problem if i use the pink one.

it s a k5 from 84 , 4wd diesel

thanks