Cylinder Head and Valve Train
WARNING: This page is about a different car, the 2015 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
| Item | Specification |
|---|---|
| Combustion chamber volume | 3.33-3.51in3 (54.5-57.5cm3 ) |
| Valve stem diameter - intake | 0.2352-0.2360in (5.975-5.995mm) |
| Valve stem diameter - exhaust | 0.2343-0.2350in (5.95-5.97mm) |
| Valve stem-to-guide clearance - intake | 0.0007-0.0027in (.019-.069mm) |
| Valve stem-to-guide clearance - exhaust | 0.0017-0.0037in (.044-.094mm) |
| Valve head diameter - intake | 1.46in (37mm) |
| Valve head diameter - exhaust | 1.22in (31mm) |
| Valve face runout | 0.0020in (.05mm) |
| Valve face angle | 3 angle intake / 2 angle exhaust |
| Valve seat width - intake | 0.051-0.059in (1.3-1.5mm) |
| Valve seat width - exhaust | 0.055-0.063in (1.4-1.6mm) |
| Valve seat runout | 0.0024in (.06mm) |
| Valve seat angle | 120/90/60 degrees |
| Valve spring free length - intake | 1.988in (50.5mm) |
| Valve spring free length - exhaust | 1.988in (50.5mm) |
| Valve spring perpendicularity - intake | 0.118in (3mm) |
| Valve spring perpendicularity - exhaust | 0.118in (3mm) |
| Valve spring compression force - intake | 760 N |
| Valve spring compression force - exhaust | 760 N |
| Valve spring installed height - intake | 1.5748in (40mm) |
| Valve spring installed height - exhaust | 1.5748in (40mm) |
| Valve spring installed force - intake | 300 N |
| Valve spring installed force - exhaust | 300 N |
| Roller follower ratio | 2.1252:1 intake / 2.0826:1 exhaust, max |
| Cylinder head gasket surface flatness | 0.025 mm (0.001 in) in any 25 mm (1 in) x 25 mm (1 in) area; 0.050 mm (0.002 in) in any 150 mm (6 in) x 150 mm (6 in) area; 0.1 mm (0.004 in) overall |