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ENGINE - V8 OVERHAUL 12-2-65 11. Check the following valve dimensions. Renew valves as necessary. l Valve head diameter 'A': Inlet = 39.75 to l Valve head diameter 'A': Exhaust = 34.23 to l Valve stem diameter 'B': Inlet = 8.664 to l Valve stem diameter 'B': Exhaust – 4.0 litre l Valve stem diameter 'B': Exhaust – 4.0 litre 12. Check installed height of valve. l Valve installed height, end of valve to base 13. Check condition of valve springs. Valve springs must be replaced as a complete l Valve spring free length = 48.30 mm (1.90 l Valve spring fitted length = 40.40 mm (1.59 l Spring load - valve closed = 339 ± 10 N (76 ± 2.25 lbf). l Spring load - valve open = 736 ± 10 N (166 ± 2.25 lbf). 14. Check valve stem to guide clearance using the following procedures: 15. Insert each valve into its respective guide. in) out of valve seat and position a DTI gauge 17. Move valve towards front of cylinder head and zero DTI gauge ensuring that stylus of gauge 18. Move valve towards rear of cylinder head and record gauge reading to give valve stem to l Valve stem to guide clearance 'D': Inlet = l Valve stem to guide clearance 'D': Exhaust l Valve stem to guide clearance 'D': Exhaust 19. Renew valve guides as necessary. 20. Using valve guide remover tool LRT-12-037 press valve guide into combustion face side of 21. Lubricate new valve guide with engine oil and with tapered portion of guide leading, insert Note: Service valve guides are 0.025 mm 22. Fully fit guide using tool LRT-12-039A and distance piece tool LRT-12-208 l Valve guide installed height 'A' = 15.00 mm 23. Ream valve guide to 8.70 mm (0.342 in). Note: Service valve guides are supplied with an 24. Position cylinder head stands and mount cylinder head on stands. 25. Check valve seat insert for pitting, burning, cracks and wear. Replace as necessary. |