INSTALLATION SERVICE POINTS ►A◄ VALVE STEM SEALS INSTALLATION 1.Apply a small amount of engine oil to the valve stem seals. • Do not re-use the valve stem seal. • The special tool MB991999 must be used to install the valve stem seal. Improper installation could result in oil leaking past the valve guide.

2.Use special tool MB991999 to fill a new valve stem seal in the valve guide using the valve stem area as a guide.

►B◄ EXHAUST VALVE SPRINGS/INTAKE VALVE SPRINGS INSTALLATION

Install the valve springs with its identification color painted end facing the rocker arm.

►C◄ VALVE SPRING RETAINER LOCKS INSTALLATION

Use special tool MD998772 to compress the valve spring and then install the valve spring retainer lock in the same manner as removal.

►D◄ CAMSHAFT INSTALLATION

Set the dowel pin of the camshaft in the position shown in the figure.

►E◄ INTAKE ROCKER ARM AND SHAFT ASSEMBLY/INTAKE ROCKER ARM SHAFT CAPS INSTALLATION

1.Place the intake rocker shaft so that its 5.5 mm (0.22 inch) hole faces toward the cylinder head. 2.Install the intake rocker arm shaft caps. 3.Tighten the intake rocker shaft mounting bolts to the specified torque. Tightening torque: 31 ± 3 N·m (23 ± 2 ft-lb)

►F◄ EXHAUST ROCKER ARM AND SHAFT ASSEMBLY/EXHAUST ROCKER ARM SHAFT CAPS INSTALLATION

1.Install the exhaust rocker shaft so that its notch is positioned as shown. 2.Install the exhaust rocker arm shaft caps. 3.Tighten the exhaust rocker shaft mounting bolts to the specified torque. Tightening torque: 13 ± 1 N·m (115 ± 9 in-lb)

►G◄ CAMSHAFT OIL SEAL INSTALLATION

1.Apply engine oil to the entire inner diameter of the oil seal lip. 2.Use special tool MD998713 to press-fit the oil seal as shown.

►H◄ CAMSHAFT SPROCKET INSTALLATION

1.Hold the camshaft sprocket with special tools MB990767 and MD998719 in the same manner as removal. 2.Tighten the camshaft sprocket mounting bolt to the specified torque. Tightening torque: 89 ± 9 N·m (65 ± 7 ft-lb)

►I◄ CAMSHAFT POSITION SENSOR SUPPORT INSTALLATION 1.Remove sealant from the camshaft position sensor support and cylinder head surfaces.

2.Apply the sealant to the camshaft position sensor support flange in a continuous bead as shown in the illustration. Specified sealant: 3MTM AAD Part No.8672, 8679/8678 or equivalent NOTE: Install the camshaft position sensor support within 15 minutes after applying the sealant. 3.Install the camshaft position sensor support to the cylinder head. Wait at least one hour. Never start the engine or let engine oil or coolant touch the adhesion surface during that time. 4.Tighten the camshaft position sensor support mounting bolts to the specified torque. Tightening torque: 14 ± 1 N·m (120 ± 13 in-lb)

►J◄ ENGINE OIL PRESSURE SWITCH INSTALLATION 1.Remove sealant from the engine oil pressure switch and cylinder head surfaces.

2.Apply sealant to the thread of the engine oil pressure switch as shown. Specified sealant: 3MTM AAD Part No.8672, 8679/8678 or equivalent NOTE: Install the engine oil pressure switch within 15 minutes after applying the sealant. Wait at least one hour. Never start the engine or let engine oil or coolant touch the adhesion surface during that time.

3.Tighten the engine oil pressure switch to the specified torque as shown. Tightening torque: 10 ± 2 N·m (89 ± 17 in-lb)

►K◄ O-RING/ENGINE OIL CONTROL VALVE INSTALLATION • Never re-use the O-ring.

• Before installing O-ring, wind the tape with the soft adhesion (sealing tape) around the oil passages cut-out area of engine oil control valve to prevent the damage. If the O-ring is damaged, it can be the cause of oil leak. 1.Apply a small amount of engine oil to the O-ring and then install it to the engine oil control valve. 2.Assemble the engine oil control valve to the cylinder head. 3.Tighten the engine oil control valve mounting bolt to the specified torque. Tightening torque: 11 ± 1 N·m (98 ± 8 in-lb)