Cylinder Head And Valve Train
WARNING: This page is about a different car, the 2015 Jaguar XK, 2014 Jaguar XK, 2013 Jaguar XK, and 2012 Jaguar XK. 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) |
| Valve guide inner diameter (mm) | 5.51 ± 0.01 |
| Intake valve effective length (mm) (tip to gauge line) | 97.63 ± 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 | 43.43 |
| Valve spring free length (mm) - exhaust | 46.1 |
| Valve spring installed height (mm) - inlet | 34.49 |
| Valve spring installed height (mm) - exhaust | 35.1 |
| Camshaft lobe lift intake (mm) 5.5 (low) | 10.53 (high) |
| 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 |