When I was doing some reading on this subject, I came across a "mod" I guess you could say where guys were movin the resevoir to the nose of the frame. They were sayin something about when you go up (or down can't remember) a hill its possible for coolant to get trapped in the vent tube after the resevoir and then when you go down, (or up) hill it drains out and and could make someone think they have an issue when there is nothin wrong. It was somethin along them lines, dont remember where that was at, but it had drawings and measurements and everything