Camshaft and VTC Actuator Removal, Installation, and Inspection
2. Intake Air Duct - Remove

6. Harness Holder - Remove
1.
Disconnect the ground cable (A).
2.
Remove the harness holder (B).

7. Camshaft Holder Cover - Remove

8. Side Cover - Remove

9. No. 1 Piston at Top Dead Center - Set (Crank Side)
1.
Turn the crankshaft so its white mark (A) on the crankshaft pulley lines up with the pointer (B) on the cam chain case.

10. No. 1 Piston at Top Dead Center - Set (Cam Side)
1.
Set the No. 1 piston at top dead center (TDC). The ''UP'' mark (A) on VTC actuator B should be at the top. Align the TDC marks (B) on VTC actuator A and VTC actuator B. The TDC marks (C) on VTC actuator B should line up with the top edge of the cam chain case (D).

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

13. VTC Actuator A Mounting Bolt and VTC Actuator B Mounting Bolt - Loosen
NOTE: If remove the 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.

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

15. Camshaft - Remove
1.
Carefully tip up the exhaust camshaft on the transmission side of the engine until there is enough slack in the chain to lift the chain off of the VTC actuator B's teeth.
2.
Remove the exhaust camshaft (A) and the lower exhaust camshaft holders (B), then remove the intake camshaft (C).

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


VTC Actuator Inspection

1. VTC Actuator - Inspect
1.
Check that VTC actuator A is locked by turning VTC actuator A counterclockwise. If it is not locked, turn VTC actuator A clockwise until it stops, then recheck it. If it is still not locked, replace VTC actuator A.
2.
Seal the retard holes (A) in the No. 1 camshaft journal with tape and a wire tie.
3.
Seal one of the advance hole (A) with tape.
4.
Apply air to the unsealed advance hole 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.
8.
VTC actuator B: Check that VTC actuator B is locked by turning it.

Camshaft Inspection

1. Camshaft - Remove


4. Camshaft - Inspect
1.
Apply new engine oil to the threads of the camshaft holder bolts.
2.
Put the rocker shaft holders, the lower exhaust camshaft holders, the intake camshaft holders, the upper exhaust camshaft holders and the camshaft on the cylinder head, then tighten the bolts, in sequence, to the specified torque.
Specified Torque:
13 N·m (1.3 kgf·m, 10 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):
0.05?0.20 mm (0.0020?0.0079 in)
Service Limit:
0.40 mm (0.0157 in)
4.
Loosen the camshaft holder bolts two turns at a time, in a crisscross pattern. Then remove the intake camshaft holders and the upper exhaust 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 intake camshaft holders and the upper exhaust camshaft holders, then tighten the bolts to the specified torque as shown in step 2.
8.
Remove the intake camshaft holders and upper exhaust 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, No. 5 and No. 6 Journals:
0.060?0.099 mm (0.00236?0.00390 in)
Exhaust: No. 3, No. 4, No. 5 and No. 6 Journals:
0.060?0.099 mm (0.00236?0.00390 in)
Service Limit:
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 height.
Cam Lobe Height Standard (New):
 
INTAKE
EXHAUST
PRI
33.647 mm (1.32468 in)
34.246 mm (1.34827 in)
MID
35.252 mm (1.38787 in)
SEC
33.647 mm (1.32468 in)
PRI: Primary
MID: Mid
SEC: Secondary
C/C: Cam Chain
    

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

2. Camshaft - Install
1.
Install the intake camshaft (A).
2.
Install the lower exhaust camshaft holders (B), then slide the exhaust camshaft (C) in at an angle to allow the cam chain to slip over the teeth.
3.
Set the No. 1 piston at top dead center (TDC). The ''UP'' mark (A) on VTC actuator B should be at the top. Align the TDC marks (B) on VTC actuator A and VTC actuator B. The TDC marks (C) on VTC actuator B should line up with the top edge of the cam chain case (D).
4.
Apply new engine oil to the camshaft journals and lobes on both cams.

3. Camshaft Holder - Install
1.
Apply new engine oil to the threads of the camshaft holder bolts.
2.
Set the intake camshaft holders (A), the upper exhaust camshaft holders (C), and cam chain guide B in place.
3.
Tighten the camshaft holder bolts, in sequence, to the specified torque.
Specified Torque:
13 N·m (1.3 kgf·m, 10 lbf·ft)

4. VTC Actuator A Mounting Bolt and VTC Actuator B Mounting Bolt - Tighten
NOTE: If removed VTC actuator A/B, 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)

6. No. 1 Piston at Top Dead Center - Set (Crank Side)
1.
Rotate the crankshaft clockwise so its white mark (A) on the crankshaft pulley lines up with the pointer (B) on the cam chain case.

7. No. 1 Piston at Top Dead Center - Check (Cam Side)
1.
Check the No. 1 piston at top dead center (TDC). The ''UP'' mark (A) on VTC actuator B should be at the top. Align the TDC marks (B) on VTC actuator A and VTC actuator B. The TDC marks (C) on VTC actuator B should line up with the top edge of the cam chain case (D).

9. Side Cover - Install
1.
Apply liquid gasket to the No. 5 rocker shaft holder mating surface of the side cover and to the inside edge of the threaded bolt holes.
2.
Install the side cover (A).

10. Camshaft Holder Cover - Install
1.
Apply liquid gasket to the cylinder head mating surface of the camshaft holder cover and to the inside edge of the threaded bolt holes.
2.
Install the camshaft holder cover.

11. Harness Holder - Install
1.
Install the harness holder (A).
2.
Connect the ground cable (B).

14. Intake Air Duct - Install

16. Fuel Leak - 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 times, then check for fuel leakage.