Engine Valves & Valve Springs Specifications
WARNING: This page is about a different car, the 1997 Ford Ranger, 1997 Ford Explorer, 1996 Ford Ranger, and 1996 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
VALVES & VALVE SPRINGS
| Application | Specification | ||
|---|---|---|---|
| Face Angle | 44° | ||
| Face Runout | .002" (.051 mm) | ||
| Head Diameter | |||
| Intake | 1.71" (43.5 mm) | ||
| Exhaust | 1.36" (34.5 mm) | ||
| Stem Diameter | |||
| Intake | .3159-.3167" (8.024-8.044 mm) | ||
| Exhaust | .3149-.3156" (8.998-8.016 mm) | ||
| Valve Margin | .031" (.79 mm) | ||
| Valve Springs | |||
| Free Length | 1.91" (48.5 mm) | ||
| Installed Height | 1.58-1.61" (40.1-40.9 mm) | ||
| Out-Of-Square | .078" (1.98 mm) | ||
| Lbs. @ In. (kg @ mm) | |||
| Pressure | |||
| Closed | 60-68 @ 1.59 (27-31 @ 37.8) | ||
| Open | 138-149 @ 1.22 (63-68 @ 31.0) | ||