Engine Valves & Valve Springs Specifications
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
VALVES & VALVE SPRINGS
| Application | Specification | ||
|---|---|---|---|
| Intake Valves | |||
| Face Angle | 30° | ||
| Minimum Margin | .112" (2.84 mm) | ||
| Stem Diameter | .31185-.31255" (7.921-7.939 mm) | ||
| Valve Head Recession | .046-.058" (1.17-1.47 mm) | ||
| Exhaust Valves | |||
| Face Angle | 37.5° | ||
| Minimum Margin | .054" (1.37 mm) | ||
| Stem Diameter | .31185-.31255" (7.9210-7.9388 mm) | ||
| Valve Head Recession | .052-.064" (1.32-1.63 mm) | ||
| Valve Springs | |||
| Free Length | 1.925-2.225" (48.90-56.52 mm) | ||
| Installed Height | |||
| Intake | 1.767" (44.881 mm) | ||
| Exhaust | 1.833" (46.568 mm) | ||
| Out-Of-Square | .078" (1.98 mm) | ||
| Lbs. @ In. (kg @ mm) | |||
| Pressure | |||
| Valve Closed | 71-79 @ 1.833" (32-36 @ 46.56) | ||
| Valve Open | 225-249 @ 1.352" (102-112 @ 34.35) | ||