Cylinder Head and Valve Train
WARNING: This page is about a different car, the 2018 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
| Item | Specification |
|---|---|
| Cylinder head gasket surface flatness | Flat within 0.08 mm (0.003 in) length end to end, area 150 mm (5.9 in) x 150 mm (5.9 in) (or full width) should be less than 0.05 mm (0.002 in) |
| Valve tappet clearance - intake | 0.006 -0.010 in (.15 -.25 mm) |
| Valve tappet clearance - exhaust - Engine must be at room temperature before measuring | 0.014 -0.018 in (.36 -.46 mm) |
| Valve guide bore inner diameter | 0.217 -0.218 in (5.519 -5.549 mm) |
| Valve stem diameter - intake | 0.2157 -0.2164 in (5.479 -5.497 mm) |
| Valve stem diameter - exhaust | 0.2152 -0.2159 in (5.466 -5.484 mm) |
| Valve stem-to-guide clearance - intake | 0.0009 -0.0028 in (.022 -.07 mm) |
| Valve stem-to-guide clearance - exhaust | 0.0014 -0.0033 in (.035 -.083 mm) |
| Valve head diameter - intake | 1.46 in (37 mm) |
| Valve head diameter - exhaust | 1.22 in (31 mm) |
| Valve face runout | 0.002 in (.05 mm) |
| Valve face angle | 44.5 -45.5 deg. |
| Valve seat width - intake | 0.051 -0.059 in (1.3 -1.5 mm) |
| Valve seat width - exhaust | 0.067 -0.079 in (1.7 -2 mm) |
| Valve seat runout | 0.002 in (.04 mm) |
| Valve seat angle | 44.5 -45.5 deg. |
| Valve spring free length (approx.) | 1.890 in (48 mm) |
| Valve spring compression pressure (N @ spec. length) | 525 N @ 27.0 mm (114.7 lb @ 1.06 in) |
| Valve spring installed height | 1.457 in (37 mm) |
| Valve spring installed height pressure (N @ spec. length) | 235 N @ 37.0 mm (53 lb @ 1.45 in) |
| Valve spring installed pressure -- service limit | 10% force loss @ specified height |