Hyundai Genesis: Cylinder Head Assembly / CVVT Assembly Repair procedures

Removal

1.	Remove the timing chain. (Refer to Timing System - "Timing Chain")

2.	Remove the CVVT assembly. A. A: LH exhaust CVVT B. B: LH intake CVVT C. C: RH intake CVVT D. D: RH exhaust CVVT When removing the CVVT assembly bolt, prevent the camshaft from rotating by using a wrench at position (A).

Inspection

1.	Clamp the camshaft using a vise. Be careful not to damage the cam lobes and journals while using the vise.

2.	Check that the CVVT is locked by turning it clockwise or counterclockwise. It is normal that the CVVT does not rotate.

3.	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]

4.

Intake CVVT : Apply approx. 150 kPa (1.5 kgf/cm?, 21 psi ) of compressed air into the unsealed advance hole to release the lock. Exhaust CVVT : Apply approx. 150 kPa (1.5 kgf/cm?, 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.

5.

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°±0°30’ (from the most retarded position to the most advanced position) Exhaust : 25°±0°30’ (from the most advanced position to the most retarded position)

6.	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.

Installation

1.

Install the continuous variable valve timing (CVVT) assembly. Tightening torque : 64.7 ~ 76.5 N.m (6.6 ~ 7.8 kgf.m, 47.7 ~ 56.4 lb-ft) • Install the dowel pin of CVVT assembly to the camshaft-inlet. Then, be careful not to install the pin on the oil hole. • Hold the hexagonal head wrench portion of the camshaft with a vise, and install the bolt and CVVT assembly. • After connecting the dowel pin of the CVVT to the camshaft or tightening the CVVT bolt, turn the housing of the CVVT assembly counterclockwise by hand to put the lock pin of the CVVT assembly in the correct position. • After connecting the CVVT assembly to the camshaft, ensure that the camshaft is immobilized without exerting any constraining force n the housing or sprocket of the CVVT assembly. • After connecting the CVVT assembly to the camshaft, ensure that the CVVT assembly is not press-fit too forcefully. • Do not rotate CVVT assembly when camshaft is installed to dowel pin of CVVT assembly. A. A: LH exhaust CVVT B. B: LH intake CVVT C. C: RH intake CVVT D. D: RH exhaust CVVT When installing the CVVT assembly bolt, prevent the camshaft from rotating by using a wrench at position (A).

2.	Install the timing chain. (Refer to Timing System - "Timing Chain")

CVVT Assembly Description and Operation

Description Continuous Variable Valve Timing (CVVT) system advances or retards the valve timing of the intake and exhaust valve in accordance with the ECM control signal which is calculated by ...

Camshaft Components and Components Location

Components 1. RH Exhaust camshaft2. RH Intake camshaft3. LH Intake camshaft4. LH Exhaust camshaft ...

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