Before Cutback (All Ranges)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2006 Mazda MPV, 2005 Mazda MPV, 2004 Mazda MPV, 2004 Mazda 6, and 2003 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.

Spring force and pressure modifier pressure (7) are applied to the bottom end of the valve and push the valve upward. Conversely, oil pump discharge pressure (5) is applied to the top end of the valve and pushes the valve downward. Oil pump discharge pressure (5) is usually greater than spring force thus forcing the valve to move downward. When the valve moves downward, the drain port (X) will open and oil pump discharge pressure (5) will be reduced. Thus, oil pump discharge pressure (5) and spring force maintain the balance. Oil pump discharge pressure (5) is also called line pressure.