Camshaft and VTC Actuator Removal, Installation, and Inspection

NOTE: enu_12713377_2.0 Where icon is shown, click for further information.


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8350_3.0_enu_15102573_2.0


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8350_3.0_enu_15126028_2.0

enu_12713377_2.0
Detailed information, notes, and precautions
*1
These parts have inspection items.

8. High Pressure Fuel Pump Base - Remove


12. Cam Chain Guide B, Intake Camshaft Holder, and Upper Exhaust Camshaft Holder - Remove
NOTE: If remove VTC actuator A/B, do step 1 and/or 2.
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.
3.
Remove the camshaft holder bolts. To prevent damaging the camshafts, loosen the bolts, in sequence, two turns at a time.

13. Exhaust Camshaft - Remove

NOTE: 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.

14. Lower Exhaust Camshaft Holder - Remove


15. Intake Camshaft - Remove


16. VTC Actuator A - Remove

NOTE: If remove the VTC actuator A, do this procedure.

17. VTC Actuator B - Remove

NOTE: If remove the VTC actuator B, do this procedure.


NOTE: enu_12713377_2.0 Where icon is shown, click for further information.


1

8350_3.0_enu_15126029_2.0

enu_12713377_2.0
Detailed information, notes, and precautions
enu_12714505_1.0
Torque: N·m (kgf·m, lbf·ft)
*1
These parts have inspection items.


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8350_3.0_enu_15102576_2.0

enu_12713377_2.0
Detailed information, notes, and precautions
enu_12714505_1.0
Torque: N·m (kgf·m, lbf·ft)

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

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

3. Intake Camshaft - Install
1.
Turn the crankshaft so its white mark (A) on the crankshaft pulley lines up with the pointer (B) on the cam chain case.
2.
Install the intake camshaft.

4. Lower Exhaust Camshaft Holder - Install


5. Exhaust Camshaft - Install
1.
Slide the exhaust camshaft in at an angle to allow the cam chain to slip over the teeth.
2.
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).
3.
Apply new engine oil to the camshaft journals and the cam lobes on both camshafts.

6. Cam Chain Guide B, Intake Camshaft Holder, and Upper Exhaust Camshaft Holder - Install
1.
Apply new engine oil to the threads of the camshaft holder bolts.
2.
Tighten the camshaft holder bolts, in sequence, to the specified torque.
3.
If removed VTC actuator A, hold the intake camshaft with an open-end wrench, then tighten the VTC actuator A mounting bolt to the specified torque.
4.
If removed VTC actuator B, hold the exhaust camshaft with an open-end wrench, then tighten the VTC actuator B mounting bolt to the specified torque.

10. High Pressure Fuel Pump Base - Install

NOTE: Apply liquid gasket to the No. 5 rocker shaft holder mating surface of the high pressure fuel pump base and to the inside edge of the threaded bolt holes.

17. 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 pressurizesd. Repeat this two or three times, then check for fuel leakage.

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)
Intake: No. 2, No. 3, No. 4, and No. 5 Journals:
0.060?0.099 mm (0.00236?0.00390 in)
Exhaust: No. 1 and No. 2 Journals:
0.030?0.069 mm (0.00118?0.00272 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):
 
EXHAUST
INTAKE
PRI
33.633 mm (1.32413 in)
34.172 mm (1.34535 in)
MID
34.519 mm (1.35901 in)
SEC
33.633 mm (1.32413 in)
PRI: Primary
MID: Mid
SEC: Secondary
C/C: Cam Chain