Valve Springs
WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
| Item | Specification |
|---|---|
| Valve spring free length - reference | 1.957 in (49.7 mm) |
| Valve spring solid height - maximum | 0.906 in (23 mm) |
| Valve spring compression pressure - installed | 34.0 mm @ 390 +/- 20 N (1.338 in @ 87.6 +/- 4.4 lbf) |
| Valve spring compression pressure - valve open | 24.5 mm @ 650 +/- 29 N (0.964 in @ 146.1 +/- 6.5 lbf) |
| Valve spring installed height - reference | 1.319 -1.358 in (33.5 -34.5 mm) |