Camshaft: Service and Repair

DISASSEMBLY
1. Disconnect the breather hose and the PCV hose.





2. Remove the coolant pump pulley and crankshaft pulley.
3. Remove the timing belt cover.
4. Loosen the timing belt tensioner pulley and temporarily secure it.
5. Remove the timing belt from the camshaft sprocket.





6. Loosen the center cover bolts and then remove the center cover.
7. Remove the ignition coil assembly.
8. Loosen the cylinder head cover bolts and then remove the cylinder head.
9. Remove the camshaft sprocket.





10. Remove the camshaft bearing caps and timing chain.
11. Remove the camshaft.
12. Remove the HLA.

INSPECTION
Camshafts
1. Check the camshaft journals for wear. If the journals are badly worn, replace the camshaft.





2. Check the cam lobes for damage. If the lobe is damaged or worn excessively, replace the camshaft.
Cam height: [Standard value]
Intake:
[1.8L] 44.449 mm (1.7499 inch)
[2.0L] 44.049 mm (1.7342 inch)
Exhaust: 45.049 mm (1.7736 inch)
[Limit]
Intake:
[1.8L] 44.349 mm (1.7460 inch)
[2.0L] 43.949 mm (1.7302 inch)
Exhaust: 44.949 mm (1.7696 inch)
3. Check the cam surface for abnormal wear or damage, and replace if necessary.
4. Check each bearing for damage. If the bearing surface is excessively damaged, replace the cylinder head assembly or camshaft bearing cap, as necessary.
Camshaft end play: 0.1-0.2 mm (0.004-0.008 inch)

Oil Seal front Camshaft





1. Check the lips for wear. If the lip threads are worn, replace.
2. Check the oil seal lip contacting surface of the camshaft. If it is worn, replace the camshaft.

HLA (Hydraulic Lash Adjuster)





With the HLA filled with engine oil, hold A and press B by hand. If B moves, replace the HLA.





For other specific troubleshooting regarding HLA, refer to the table.

Chain guide





1. Check the chain guide for bend, crack or damage, Replace if necessary.
2. Check the rubber part of chain guide for abnormal wear. Replace if necessary.

Timing chain





Check the bushing and plate of timing chain for wear. Replace if it is worn severely.

REASSEMBLY
1. Install the HLA.





2. Align the camshaft timing chain with intake timing chain sprocket and exhaust timing chain sprocket as shown.





3. Install the camshaft after lubricating the journal of camshaft with engine oil.





4. Install the bearing caps. Check the markings on the caps for intake/exhaust identification symbol.
I: Intake camshaft
E: Exhaust camshaft





5. Tighten the bearing caps to the specified torque in two or three steps as shown.
Tightening torque
Bearing cap bolt: 12-14 Nm (120-140 kg.cm, 9-10 ft. lbs.)





6. Using special tool, camshaft oil seal installer (09221-21000), press the camshaft oil seal. Be sure to apply engine oil to the external surface of the oil seal.Insert the oil seal along he camshaft front end and install by driving the installer with a hammer until the oil seal is fully seated.





7. Install the camshaft sprocket to the specified torque.
Tightening torque
Camshaft sprocket bolt: 80-100 Nm (800-1000 kgf-cm, 60-74 ft. lbs.)





8. Align the camshaft sprocket and crankshaft sprocket timing marks. The piston in the No.1 cylinder will then be at the being checking to see preceding correctly top dead center on the compression stroke.
9. Install the cylinder head cover.
Tightening torque
Cylinder head cover bolts: 8-10 Nm (80-100 kgf-cm, 6-7 ft. lbs.)
10. Install the spark plug cables, ignition coil assembly and cylinder head center cover.





11. Install the timing belt and then tighten the timing belt tensioner pulley.
12. Install the timing belt cover.
13. Install the coolant pump pulley and crankshaft pulley.