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 (mm) (flatness specification) overall | 0.08 |
| over 150x150 mm area | 0.05 |
| over 25x25 mm area | 0.02 |
| 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 |