Engine Valves & Valve Springs Specifications
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
VALVES & VALVE SPRINGS
| Application | Specification | ||
|---|---|---|---|
| Valves | |||
| Intake | |||
| Face Angle | 45° | ||
| Head Diameter | 1.30" (33 mm) | ||
| Margin | .0472" (1.2 mm) | ||
| Stem Diameter | .28" (7.0 mm) | ||
| Exhaust | |||
| Face Angle | 45° | ||
| Head Diameter | 1.22" (31 mm) | ||
| Margin | .0394" (1.0 mm) | ||
| Stem Diameter | .28" (7.0 mm) | ||
| Valve Springs | |||
| Installed Height | 1.61" (41.0 mm) | ||
| Out-Of-Square | .0787" (2.00 mm) | ||
| Lbs. @ In. (kg @ mm) | |||
| Pressure | |||
| Valve Closed | 61.8 @ 1.61 (28 @ 41.0) | ||
| Valve Open | 68.8 @ 1.61 (31 @ 41.0) | ||