drpsycho wrote:i didnt know if the KA head out of an altima would fit my s13 KA and i dont understand why it was over heating after i replaced everything in the coolant system
KA is not easy to bleed after coolant service. You jack up the front as high as possible and run the car, so air bubble will escape. You can leave the radiator cap open or open a bleeder bolt on the block. Believe it or not, a bad radiator cap sometimes causes over heating too. Rubber flap is supposed to open when pressure goes up, but sometime it doens't happen.
Sorry, no idea about Altima KA head fitting on 240 KA.