If it's RG- 59 it will work but you may have problems like ghost on certain channels. It should be RG-6 for the best reception.
I have installed a few dish satellites over the years but now it's gotten a bit more complicated depending on what you want as far as how many receivers, DVR's or TiVo's, etc........it's better to have the dish company do it and many times they do it for free with a one or two year commitment.