2.
Remove the front camshaft bearing cap (A) and the camshaft bearing caps (B).
Remove the timing chain.
(Refer to Timing System - "Timing Chain")
Remove the front camshaft bearing cap (A) and the camshaft bearing caps (B).
Remove the intake CVVT assembly (A) and exhaust CVVT assembly (B), and then remove the camshaft (C).
Inspect cam lobes.
Using a micrometer, measure the cam lobe height.
Cam height
Intake : 36.4183mm (1.4337in)
Exhaust : 36.1543mm (1.4233in)
If the cam lobe height is less than standard, replace the camshaft.
Inspect the camshaft journal clearance.
Clean the bearing caps and camshaft journals.
Place the camshafts on the cylinder head.
Lay a strip of plastigage across each of the camshaft journals.
Install the front camshaft bearing cap (A) and the camshaft bearing cap (B) as following method with specified torque.
Tightening torque
Step 1
A : 9.8 N.m (1.0 kgf.m, 7.2 lb-ft)
B : 5.9 N.m (0.6 kgf.m, 4.3 lb-ft)
Step 2
A : 18.6 ~ 22.6 N.m (1.9 ~ 2.3 kgf.m, 13.7 ~ 16.6 lb-ft)
B : 11.8 ~ 13.7 N.m (1.2 ~ 1.4 kgf.m, 8.7 ~ 10.1 lb-ft)
Do not turn the camshaft.
Remove the bearing caps.
Measure the plastigage at its widest point.
Camshaft bearing oil clearance
Intake : 0.027 ~ 0.057mm (0.0010 ~ 0.0022in)
Exhaust : 0.027 ~ 0.057mm (0.0010 ~ 0.0022in)
Camshaft journal outer diameter
Intake / Exhaust No.1: 36.464 ~ 36.478mm (1.4356 ~ 1.4361in)
Intake / Exhaust No.2~5 : 22.964 ~ 22.978mm (0.9040 ~ 0.9046in)
Camshaft journal bore inner diameter
Intake / Exhaust No.1: 36.505 ~ 36.521mm (1.4372 ~ 1.4378in)
Intake / Exhaust No.2~5 : 23.005 ~ 23.021mm (0.9057 ~ 0.9060in)
If the oil clearance is greater than maximum, replace the camshaft. If necessary, replace cylinder head.
Completely remove the plastigage.
Remove the camshafts.
Inspect the camshaft end play.
Install the camshafts (A).
Install the front camshaft bearing cap (A) and the camshaft bearing cap (B) as following method with specified torque.
Tightening torque
Step 1
A : 9.8 N.m (1.0 kgf.m, 7.2 lb-ft)
B : 5.9 N.m (0.6 kgf.m, 4.3 lb-ft)
Step 2
A : 18.6 ~ 22.6 N.m (1.9 ~ 2.3 kgf.m, 13.7 ~ 16.6 lb-ft)
B : 11.8 ~ 13.7 N.m (1.2 ~ 1.4 kgf.m, 8.7 ~ 10.1 lb-ft)
Do not turn the camshaft.
When cam caps are installed, arrows on the top of caps must point to out side of engine.
Using a dial indicator, measure the end play while moving the camshaft back and forth.
Camshaft end play
Intake : 0.1 ~ 0.2 mm (0.0039 ~ 0.0078 in)
Exhaust : 0.1 ~ 0.2 mm (0.0039 ~ 0.0078 in)
If the end play is greater than maximum, replace the camshaft. If necessary, replace cylinder head.
Remove the camshafts.
Inspect CVVT assembly.
Clamp the camshaft using a vise. Be careful not to damage the cam lobes and journals in the vise.
Check that the CVVT is locked by turning it clockwise or counterclockwise. It must not rotate.
Intake CVVT : Seal one of the two advance holes in the camshaft journal with tape.
Exhaust CVVT : Seal one of the two retard holes in the camshaft journal with tape.
[Intake]
[Exhaust]
Intake CVVT : Apply approx. 150 kPa (1.5 kgf/㎠, 21 psi) of compressed air into the unsealed advance hole to release the lock.
Exhaust CVVT : Apply approx. 150 kPa (1.5 kgf/㎠, 21 psi) of compressed air into the unsealed retard hole to release the lock.
Cover the oil paths with a piece of cloth when applying compressed air to prevent oil from spraying.
Intake CVVT : With compressed air applied, rotate the CVVT into the advance direction (counterclockwise) within its phasing range and check that the CVVT turns smoothly.
Exhaust CVVT : With compressed air applied, rotate the CVVT into the retard direction (clockwise) and check that the CVVT turns smoothly.
CVVT phasing range
Intake : 25˚ ± 1˚ (from the most retarded position to the most advanced position)
Exhaust : 20˚ ± 1˚ (from the most advanced position to the most retarded position)
Intake CVVT : Rotate the CVVT into the most retarded position (clockwise) and then check that the CVVT is locked.
Exhaust CVVT : Rotate the CVVT into the most advanced position (counterclockwise) and then check that the CVVT is locked.
Install the camshaft (A), and then install the intake CVVT assembly (B) and exhaust CVVT assembly (C).
Install the front camshaft bearing cap (A) and the camshaft bearing caps (B) as following method with specified torque.
Tightening torque :
1st step
A : 9.8 N.m (1.0 kgf.m, 7.2 lb-ft)
B : 5.9 N.m (0.6 kgf.m, 4.3 lb-ft)
2nd step
A : 18.6 ~ 22.6 N.m (1.9 ~ 2.3 kgf.m, 13.7 ~ 16.6 lb-ft)
B : 11.8 ~ 13.7 N.m (1.2 ~ 1.4 kgf.m, 8.7 ~ 10.1 lb-ft)
Arrow on the top of cap must to outside of engine.
Install the other parts in the reverse order of removal.
