Camshaft and VTC Actuator Removal, Installation, and Inspection

NOTE: After cam chain removal, reinstall the cam chain guide B mounting bolts to the specified torque, if remove VTC actuator A/B.

8. Adjusting Screw - Loosen
1.
Loosen the locknuts and the adjusting screws (A).

9. VTC Actuator A/B Mounting Bolt - Loosen
NOTE: If remove VTC actuator A/B, do this procedure.
1.
Hold the intake camshaft with an open-end wrench, then loosen the VTC actuator A mounting bolt.
2.
Hold the exhaust camshaft with an open-end wrench, then loosen the VTC actuator B mounting bolt.

10. Camshaft - Remove
1.
Remove the camshaft holder bolts. To prevent damaging the camshafts, loosen the bolts, in sequence, two turns at a time.
2.
Remove the camshaft holders (A), cam chain guide B, the intake camshaft (C), and the exhaust camshaft (D).

11. VTC Actuator A/B - Remove
NOTE: If remove VTC actuator A/B, do this procedure.


1. VTC Actuator A/B - Install
NOTE: If VTC actuator A/B is removed, do this procedure.
1.
Install VTC actuator A/B.
2.
Apply new engine oil to the threads of the VTC actuator A/B mounting bolt (C), then loosely install it.

2. Camshaft - Install
1.
Install the intake camshaft (A), the exhaust camshaft (C), the camshaft holders (D), and cam chain guide B.
2.
Install the camshaft holder bolts, in sequence, to 5.0 N·m (0.51 kgf·m, 3.7 lbf·ft).
3.
Tighten the camshaft holder bolts, in sequence, to the specified torque.
Specified Torque:
18 N·m (1.8 kgf·m, 13 lbf·ft)

3. VTC Actuator A/B Mounting Bolt - Tighten
NOTE: If VTC actuator A/B is removed, do this procedure.
1.
Hold the intake camshaft with an open-end wrench, then tighten the VTC actuator A mounting bolt to the specified torque.
Specified Torque:
115 N·m (11.7 kgf·m, 85 lbf·ft)
2.
Hold the exhaust camshaft with an open-end wrench, then tighten the VTC actuator B mounting bolt to the specified torque.
Specified Torque:
115 N·m (11.7 kgf·m, 85 lbf·ft)

12. Fuel Leak (Low Pressure Side) - Check
1.
Turn the vehicle to the ON mode, but do not start the engine. After the fuel pump runs for about 2 seconds, the fuel line will be pressurized. Repeat this two or three time, then check for fuel leakage.

VTC Actuator A and VTC Actuator B

1. VTC Actuator A/B - Inspect
1.
Check that VTC actuator A/B is locked by turning it. If it is not locked, replace VTC actuator A/B.
2.
Seal the retard/advance holes (C) of the intake/exhaust camshaft with tape and a wire tie.
3.
Seal one of the advance/retard holes (A) of the intake/exhaust camshaft with tape.
4.
Apply air to the unsealed advance/retard hole (A) to release the lock.
5.
Check that VTC actuator A/B moves smoothly. If VTC actuator A/B does not move smoothly, replace VTC actuator A/B.
NOTE: Turn VTC actuator B by hand while applying air.
6.
Remove the wire tie, the tape, and the adhesive residue from the camshaft journal.
7.
VTC actuator A: Turn VTC actuator A clockwise until you hear it click. Make sure to lock VTC actuator A by turning it.
VTC actuator B: Check that VTC actuator B is locked by turning it.

Camshaft

2. Camshaft - Inspect
1.
Put the camshaft holders and the camshafts on the cylinder head, then install the camshaft holder bolts, in sequence, to 5.0 N·m (0.5 kgf·m, 3.7 lbf·ft).
2.
Tighten the camshaft holder bolts, in sequence, to the specified torque.
Specified Torque:
18 N·m (1.8 kgf·m, 13 lbf·ft)
3.
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.

NOTE: Do not rotate the camshaft during inspection.
Camshaft End Play
Standard (New):
0.065?0.215 mm (0.00256?0.00846 in)
Service Limit:
0.415 mm (0.01634 in)
4.
Loosen the camshaft holder bolts two turns at a time, in a crisscross pattern. Then remove the camshaft holders from the cylinder head.
5.
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.
6.
Clean the camshaft journal surfaces in the cylinder head, then set the camshafts back in place. Place a plastigage strip across each journal.
7.
Install the camshaft holders, then tighten the camshaft holder bolts to the specified torque as shown in step 1 and step 2.
8.
Remove the camshaft holders. Measure the widest portion of plastigage on each journal:
If the camshaft-to-holder clearance is within limits, go to step 10.
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 9.
Camshaft-to-Holder Oil Clearance
Standard (New):
Intake: No. 1 Journal:
0.030?0.069 mm (0.00118?0.00272 in)
Exhaust: No. 1 and No. 2 Journals:
0.030?0.069 mm (0.00118?0.00272 in)
Intake: No. 2, No. 3, No. 4, and No. 5 Journals:
0.060?0.099 mm (0.00236?0.00390 in)
Exhaust: No. 3, No. 4, and No. 5 Journals:
0.060?0.099 mm (0.00236?0.00390 in)
Service Limit:
Intake: No. 1 Journal:
0.120 mm (0.00472 in)
Exhaust: No. 1 and No. 2 Journals:
0.120 mm (0.00472 in)
Intake: No. 2, No. 3, No. 4, and No. 5 Journals:
0.150 mm (0.00591 in)
Exhaust: No. 3, No. 4, and No. 5 Journals:
0.150 mm (0.00591 in)
9.
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 service limit, replace the cylinder head.
Camshaft Total Runout
Standard (New):
0.03 mm (0.0012 in) max.
10.
Measure the cam lobe (A) height.
Cam Lobe Height Standard (New):
Intake:
33.099 mm (1.30311 in)
Exhaust:
33.273 mm (1.30996 in)