Reassembly - Refit

Cylinder Head - Decarbonise

Service Repair No - 12.29.19

Reassembly
1. Using tool LRT-12-071 fit new valve stem oil seals.
2. Fit valves.
3. Fit spring and spring cap.
4. Position LRT-12-034 to spring cap and compress valve spring.
5. Fit collets.
6. Release valve spring and remove tool LRT-12 034.
7. Using a wooden dowel and mallet, lightly tap top of each valve two or three times to seat valves and collets.
8. Thoroughly clean and lubricate hydraulic tappets with clean engine oil. Fit hydraulic tappets to original bores in cylinder head.
9. Ensure that mating faces of camshaft carrier and cylinder head are clean and dry.
10. Lubricate camshafts and bearing journals with clean engine oil.





11. Position camshafts in cylinder head with rear timing gear drive slots in each camshaft facing towards the center as shown.





12. Apply continuous thin beads of sealant, Part No. STC 4600, to paths on camshaft carrier as shown. Spread sealant to an even film using a roller.

CAUTION: To avoid contamination, assembly should be completed immediately after application of sealant.





13. Position camshaft carrier, fit and progressively tighten bolts in the sequence shown to 10 Nm (7.5 ft. lbs.).





14. Noting that the front camshaft oil seals are black in color and the rear oil seals are red, fit new camshaft oil seals using LRT-12-203 and LRT 12-148A

CAUTION: Oil seal is waxed on outer diameter and must not be lubricated before fitting.

15. Clean camshaft timing belt cover backplate bolts and apply Loctite 242 to the first 3 threads
16. Position camshaft timing belt rear cover backplates to cylinder head, fit and tighten bolts to 9 Nm (7.5 ft. lbs.).
17. Clean inlet manifold and cylinder head mating faces.
18. Fit new inlet manifold gasket to cylinder head, position inlet manifold, fit and tighten bolts to 25 Nm (18 ft. lbs.).
19. Clean and adjust spark plugs.
20. Fit spark plugs.
21. Clean rear camshaft gears and mating faces on camshafts.





22. Place gears inverted on a flat surface, with the locating lugs on the gears positioned as illustrated.





23. Keeping the timing marks aligned, position timing belt onto gears.
24. Position LRT-12-195 between the gears, turn center nut sufficiently to spread drive belt and position LRT-12-175 to camshaft gears, remove LRT-12-195 from between camshaft gears.





25. Fit LRT-12-198 alignment pins into the end of each camshaft.
26. Position timing belt and gears over LRT-12-198 and locate gears onto camshafts.





27. Position LRT-12-197 into the front end of the LH exhaust camshaft.
28. With assistance, using a 30mm socket on LRT12-197, turn the LH exhaust camshaft sufficiently to align camshaft gears to the drive slots in each camshaft.





29. Remove LRT-12-198 alignment pins and fit new camshaft gear retaining bolts.
30. Tighten camshaft gear bolts to 27 Nm (20 ft. lbs.) then a further 901. Remove LRT-12-175 from camshaft gears.
31. Remove LRT-12-197 from front end of exhaust camshaft.
32. Fit timing belt rear cover and tighten bolts to 9 Nm (7 ft. lbs.).

Refit
1. Fit cylinder head.
REFER TO Cylinder head gasket-RH.