Camshaft
Camshaft
Service Repair No - 12.13.02.01
Disassembly
1. Remove inlet manifold gasket.
2. Progressively loosen and remove 8 bolts securing rocker shaft assemblies.
3. Mark each rocker shaft in relation to original head.
4. Remove rocker shaft assemblies.
5. Remove push rods and store in their fitted order,
6. Remove tappets.
7. Remove timing chain and gears.
8. Temporarily fit camshaft gear and lightly tighten bolt.
9. Attach a dial test indicator (DTI) to front of cylinder block with stylus of DTI contacting camshaft gear.
10. Push camshaft rearwards and zero the DTI.
11. Using the camshaft gear, pull camshaft forwards and note reading on DTI. End-float should be from 0.075 to 0.25 mm (0.003 to 0.010 in).
12. If end-float is incorrect, fit a new thrust plate. If end-float is still incorrect, a new camshaft/gear must be fitted.
13. Remove camshaft bolt and gear.
14. Remove 2 bolts securing camshaft thrust plate and remove thrust plate.
15. Carefully remove the camshaft avoiding damage to the camshaft bearings.
Reassembly
1. Clean camshaft bearings in block.
2. Clean camshaft.
3. Wipe camshaft bearing faces and lobes.
4. Clean thrust plate and mating face.
5. Lubricate camshaft bearings with clean engine oil.
6. Fit camshaft, take care not to damage camshaft bearings.
7. Lubricate thrust plate and mating face with clean engine oil.
8. Position thrust plate, fit and tighten bolts to 22 Nm (17 ft. lbs.).
9. Fit timing chain and gears.
10. Immerse tappets in engine oil. Before fitting, pump the inner sleeve of tappet several times using a push rod to prime the tappets.
11. Clean tappet bores.
12. Lubricate tappets and tappet bores with clean engine oil.
13. Fit tappets.
14. Clean push rods.
15. Lubricate tappet end of push rods with clean engine oil.
16. Fit push rods.
17. Clean bases of rocker pillars and mating faces.
18. Clean contact surfaces on rockers and valves.
19. Lubricate contact surfaces on rockers and valves with clean engine oil.
20. Fit rockershafts and engage push rods. Ensure rockers shafts are fitted to the correct cylinder head.
21. Fit and progressively tighten rocker shaft bolts to 40 Nm (30 ft. lbs.).
22. Fit inlet manifold gasket.