Camshaft and Rocker Arm

CAMSHAFT AND ROCKER ARM

REMOVAL AND INSTALLATION

Removal Steps 1-17:

INSPECTION

CAMSHAFT




1. Visually check the camshaft journal surfaces and replace if damage or seizure is evident.
If the journal is seized, check the cylinder head for possible damage. Check also for clogged oil holes in the cylinder head.




2. Check cams for excessive wear and damage and replace if defects are evident. Measure the lobe height and replace if the limit is not reached.

Standard value:
Intake : 35.493 mm (1.3974 in.)
Exhaust : 35.200 mm (1.3858 in.)

Limit:
Intake : 34.993 mm (1.3777 in.)
Exhaust : 34.700 mm (1.3661 in.)

ROCKER ARM




1. Visually check the roller and replace if dent, damage, or seizure is evident.
2. Check the roller for smooth rotation. Replace if it binds or there is an excessive play.
3. Check the valve contact surface for possible damage or seizure and replace as necessary.

VALVE BODY
Check that the relief plunger slides smoothly.

SERVICE POINTS OF INSTALLATION




8. INSTALLATION OF CAMSHAFT
1. Apply engine oil to journals and cams of the camshafts.
2. Install the camshafts on the cylinder head. Use care not to confuse the intake camshaft with the exhaust one. The intake camshaft has a slit on its rear end for driving the crank angle sensor.
3. Make also sure that the dowel pins on the camshaft sprocket end are located on the top.

7./6./5./4./2./1. INSTALLATION OF BEARING CAPS




1. Bearing cap Nos.2 to 5 are of the same shape. At installation, check with the markings on the caps of cap number and intake/exhaust identification symbol. Only "L" or "R" is stamped on No.1 bearing cap.

L: For Intake camshaft side
R: For Exhaust camshaft side




2. Tighten the bearing caps in the order shown two to three times by torquing progressively.
Tighten to specification in the final sequence.

3. Check to be sure that the rocker arm is correctly placed on the lash adjuster and valve stem end.




3. INSTALLATION OF CAMSHAFT OIL SEAL
1. Install the special tool, Guide, on the camshaft.
2. Apply oil to the oil seal and insert the seal along the Guide until it contacts the cylinder head.
3. Using the special tool. Installer, press4it the oil seal into the cylinder head.