King Pins

[Flathead Fever]

Brake fluid is supposed to be replaced every two-years because it attracts moisture to it, I was an ASE licensed brake mechanic. I'm bad, I don't change it on my cars either but when I do have to replace brakes or a project like you're doing then I bleed the brakes and get that old fluid out of there. Just remove the brake line from the wheel cylinder and cap the line, then you'll just need to bleed the one cylinder, but I would bleed them all.