[Skools Out]

do a compression test to see if you have a hole rusted thru a cylinder some where or you may have a water jacket rusted thru in the block to the oil passages. sounds bad. oil and water make instant sand paper on cam and crank bearings. one way to flush all water out is remove all the plugs so it can't crank and drain the oil fill the block with diesel fuel in place of oil then turn it over with the starter a little till the fuel has flushed all the oil passages out in the block then drain and refill with good little thicker oil due to left over diesel will thin the oil.