Hmmm, a basic engine rebuild is gonna' cost in the ballpark of $3K--$4K. With the rest of your VX's non-engine related components having that many miles on it as well is asking for something else to break later on. Your VX would probably quickly turn into a can-of-worms and become a serious money-pit. Economically speaking, it might be best to sell your VX and get another vehicle (VX or other) that's more sound by jacking-up your VX's radiator cap.