Put the rocker shaft holders, the camshaft, and the camshaft holders on the cylinder head, then tighten the bolts, in sequence, to the specified torque.
Specified Torque:
5 N·m (0.5 kgf·m, 4 lbf·ft)
2.
Retighten the bolts in the numbered sequence shown.
Specified Torque:
13 N·m (1.3 kgf·m, 10 lbf·ft)
3.
Seat the camshaft by pushing it toward the rear of the cylinder head.
4.
Zero the dial indicator against the end of the camshaft, then push the camshaft back and forth, and read the end play. If the end play is beyond the service limit, replace the cylinder head and recheck. If it is still beyond the service limit, replace the camshaft.
Camshaft End Play
Standard (New):
0.065?0.215 mm (0.00256 ?0.00846 in)
Service Limit:
0.415 mm (0.01634 in)
5.
Remove the camshaft holder bolts. To prevent damaging the camshafts, loosen the bolts, in sequence, two turns at a time.
6.
Lift the camshafts out of the cylinder head, and wipe them clean, then inspect the lift ramps. Replace the camshaft if any lobes are pitted, scored, or excessively worn.
7.
Clean the camshaft journal surfaces in the cylinder head, then set the camshafts back in place. Place a plastigage strip across each journal.
8.
Install the camshaft holders, then tighten the bolts to the specified torque as shown in step 1.
9.
Remove the camshaft holders. Measure the widest portion of plastigage on each journal:
If the camshaft-to-holder clearance is within the service limits, go to step 11.
If the camshaft-to-holder clearance is beyond the service limit, and the camshaft has been replaced, replace the cylinder head.
If the camshaft-to-holder clearance is beyond the service limit, and the camshaft has not been replaced, go to step 10.
Intake Camshaft-to-Holder Oil Clearance
No. 1 Journal
Standard (New):
0.030?0.069 mm (0.00118?0.00272 in)
Service Limit:
0.120 mm (0.00472 in)
No. 2?5 Journals
Standard (New):
0.060?0.099 mm (0.00236?0.00390 in)
Service Limit:
0.150 mm (0.00591 in)
Exhaust Camshaft-to-Holder Oil Clearance
Standard (New):
0.060?0.099 mm (0.00236?0.00390 in)
Service Limit:
0.150 mm (0.00591 in)
10.
Check the total runout with the camshaft supported on V-blocks:
If the total runout of the camshaft is within the standard, replace the cylinder head.
If the total runout is beyond the standard, replace the camshaft and recheck the camshaft-to-holder oil clearance. If the oil clearance is still beyond the standard, replace the cylinder head.
