17. Clamp the camshaft in a vice with soft jaws.
18. Insert the service bolt into the unthreaded hole on the secondary camshaft gear. Using a screwdriver, align the holes in the secondary camshaft gear and the secondary camshaft journal by turning the gear clockwise. Screw the second service bolt into the threaded hole and tighten it to press the gears together. Remove the service bolt from the unthreaded hole. Repeat the procedure for the other exhaust camshaft.
19. Apply molybdenum-based grease or motor oil to the lifters, then insert them into their original bores in the cylinder heads. Install the valve adjusting shims into their original locations in the lifters.
20. Apply camshaft installation grease to the exhaust camshaft lobes, bearing journals and gear seating surfaces.
21. Install the exhaust camshaft in its original position in the cylinder head so that the alignment pin on the auxiliary gear faces the center of the head.
22. Apply a thin coat of RTV sealant to the outer edges of the mating surfaces of the front bearing caps and cylinder heads.
23. Install the bearing caps in order so that the arrows on them point towards the end of the engine where the timing belt is located.
24. Tighten the bearing cap bolts ¼ turn at a time to the specified torque listed in the Specifications at the beginning of this chapter. Start at the center cap and work toward the edges.
25. Install a new camshaft oil seal (see paragraph 9).
26. Apply camshaft installation grease to the intake camshaft lobes, bearing journals, and gear seat surfaces. If the VVT unit was removed from the intake camshaft, install it so that its groove aligns with the pin on the camshaft. Lubricate the threads and install a new nut and tighten it to the specified torque specified in Specifications at the beginning of this chapter.
27. Install the intake camshaft in its original position, and the cylinder head so that the timing mark is aligned with the timing mark of the exhaust camshaft (fig. 10.3).
Note: On the right (rear) cylinder head, align the two dots on the intake camshaft gear with the two dots on the exhaust camshaft gear. On the left (front) cylinder head, align one dot on the intake camshaft gear with one dot on the exhaust camshaft gear.
28. Install the bearing caps in numerical order with the arrows facing the front end of the engine (where is the timing belt located).
29. Tighten the bearing cap bolts ¼ turn at a time to the specified torque specified in Specifications at the beginning of this chapter. Start with the center lid and work your way out to the edges.
30. Remove the process bolt from the auxiliary gear of the exhaust camshaft.
31. Replace the rear cover of the timing belt, the gear pulleys of the camshafts, and the timing belt (see paragraph 8). Before installation, inspect the gasket on the rear timing belt cover. If there is minor damage, repair it with RTV sealant. If there are no large fragments, scrape off the old gasket material and install a new gasket.
32. Install the remaining components in the reverse order of removal.
33. Before installing the cylinder head covers, apply RTV sealant to the areas shown (fig. 4.9). Clean the rubber half-round plugs for the back of the heads and reinstall them using new RTV sealant.
34. The rest of the installation is carried out in the reverse order of removal.
35. Start the engine and check that it is working properly. Then check for leaks.