I want to get new radiator and Heater hoses tomorrow so I can work on it saturday, my question is this, what size heater hose do I need to get, I've heard 5/8,and 3/4..those guys at oreilly's know less than me and that's bad. I don't have an owners manual. thanks for your help..

oh yeah 93 f150 300 i-6 5spd

 

It's usually one of each, but I just changed mine about a month ago, and both were 5/8". Just buy 7' of 5/8" hose, and cut it to fit. Don't waste your money on a pre-cut hose.

Take care,
~Chris