Valve/Valve Spring Specifications
VALVES & VALVE SPRINGS SPECIFICATIONS
| Application |
In. (mm) |
| 5.0L |
| Valve Head Diameter |
| Intake |
1.69-1.70 (42-43) |
| Exhaust |
1.44-1.46 (36-37) |
| Valve Stem Diameter |
| Intake |
.3416-.3423 (8.68-8.69) |
| Exhaust |
.3411-.3418 (8.66-8.68) |
| Valve Face Angle |
| Intake |
44° |
| Exhaust |
44° |
| Valve Minimum Margin |
| Intake |
N/A |
| Exhaust |
N/A |
| Valve Maximum Refinish |
| Intake |
N/A |
| Exhaust |
N/A |
| Valve Spring Free Length |
| Intake |
2.04 (52) |
| Exhaust |
1.85 (47) |
| Valve Spring Out of Square |
| Intake |
.078 (1.98) |
| Exhaust |
.078 (1.98) |
| Valve Spring Installed Height |
| Intake |
1.67-1.70 (42-43) |
| Exhaust |
1.58-1.61 (40-41) |
| Valve Spring Pressure |
| Valve Closed |
| Intake |
74-82 @ 1.78 (34-37 @ 41.0) |
| Exhaust |
76-84 @ 1.60 (34-38 @ 41.0) |
| Valve Open |
| Intake |
196-212 @ 1.36 (89-96 @ 35.0) |
| Exhaust |
190-210 @ 1.20 (87-95 @ 31.0) |
| 5.8L |
| Valve Head Diameter |
| Intake |
1.77-1.79 (45-46) |
| Exhaust |
1.45-1.47 (36-37) |
| Valve Stem Diameter |
| Intake |
.3416-.3423 (8.68-8.69) |
| Exhaust |
.3411-.3418 (8.66-8.68) |
| Valve Face Angle |
| Intake |
44° |
| Exhaust |
44° |
| Valve Minimum Margin |
| Intake |
N/A |
| Exhaust |
N/A |
| Valve Maximum Refinish |
| Intake |
N/A |
| Exhaust |
N/A |
| Valve Spring Free Length |
| Intake |
2.04 (52) |
| Exhaust |
1.85 (47) |
| Valve Spring Out of Square |
| Intake |
.078 (1.98) |
| Exhaust |
.078 (1.98) |
| Valve Spring Installed Height |
| Intake |
1.77-1.80 (45-46) |
| Exhaust |
1.58-1.61 (40-41) |
| Valve Spring Pressure |
| Valve Closed |
| Intake |
74-82 @ 1.78 (34-37 @ 41.0) |
| Exhaust |
76-84 @ 1.60 (34-38 @ 41.0) |
| Valve Open |
| Intake |
190-210 @ 1.20 (86-95 @ 31.0) |
| Exhaust |
190-210 @ 1.20 (87-95 @ 31.0) |