Valve Adjustment: B2300
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Mazda Tribute, 2003 Mazda Protege5, 2003 Mazda Protege, 2003 Mazda MX-5 Miata, and 2003 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
Valve train is a "set-for-life" system, consisting of maintenance-free, direct-acting mechanical bucket tappets. Tappets are selective and would only require replacement with cylinder head repair or replacement. See appropriate article in ENGINES.