Cylinder Head And Valve Train
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2015 Jaguar XKR-S, 2015 Jaguar XKR, 2014 Jaguar XKR-S, 2014 Jaguar XKR, and 2013 Jaguar XKR-S. However, it is still accessible from the selected car via links, so may be relevant.
| ITEM |
SPECIFICATION |
| Cylinder head maximum
permitted warp (flatness specification) |
0.2 mm (0.008 in) |
| ITEM |
SPECIFICATION |
| Valve guide inner diameter (mm) |
5.51 ± 0.01 |
| Intake valve effective length (mm) (tip to gauge line) |
117.21 ± 0.1 |
| Exhaust valve effective length (mm) (tip to gauge line) |
94.39 ± 0.1 |
| Valve stem to guide clearance intake diametrical (mm) |
0.022 - 0.057 |
| Valve stem to guide clearance exhaust diametrical (mm) |
0.03 - 0.065 |
| Valve head diameter intake (mm) |
36 ± 0.1 |
| Valve head diameter exhaust (mm) |
30 ± 0.1 |
| Intake valve face angle (degrees) |
44.875 ± 0.125 |
| Exhaust valve face angle (degrees) |
44.875 ± 0.125 |
| Valve stem diameter intake (mm) |
5.4705 ± 0.0075 |
| Valve stem diameter exhaust (mm) |
5.4625 ± 0.0075 |
| Valve spring free length (mm) - inlet |
46.1 |
| Valve spring free length (mm) - exhaust |
46.1 |
| Valve spring installed height (mm) - inlet |
35.74 |
| Valve spring installed height (mm) - exhaust |
35.1 |
| Camshaft lobe lift intake (mm) |
10 |
| Camshaft lobe lift exhaust (mm) |
9.36 |
| Camshaft journal to cylinder head bearing surface clearance diametrical (mm) |
0.025 - 0.065 |
| Camshaft journal diameter - all positions |
26.965 ± 0.01 |
| Bearing diameter - all positions |
27.01 ± 0.01 |
| Camshaft journal maximum run out limit (mm) |
|
| Camshaft journals to end journals |
0.03 |
| Camshaft journals to adjacent journals |
0.015 |
| Camshaft journal maximum out of round (mm) - all journals |
0.005 |