Camshaft

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 remove the center cover.
7. Remove the ignition coil assembly.





8. Loosen the cylinder head cover bolts and remove the cylinder head cover.
9. Remove the camshaft sprocket.





10. Remove the camshaft bearing caps and timing chain.
11. Remove the camshaft.
12. Remove the HLA. (Hydraulic lash adjuster)

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.
Standard value
Intake: 43.4484 mm (1.7106 inch)
Exhaust: 43.8489 mm (1.7263 inch)
Limit
Intake: 42.9484 mm (1.6909 inch)
Exhaust: 43.3489 mm (1.7066 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 - 0.15 mm (0.0039 - 0.0059 inch)

OIL SEAL
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.





Table

TIMING CHAIN





Check the bushing and plate of timing chain for wear. Replace if wear is severe.

REASSEMBLY
1. Install the HILA.





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 camshaft journals with engine oil.





4. Install the bearing caps. The markings on the caps are for intake/exhaust identification.
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 the special tool, camshaft oil seal installer (09221-21000), press fit the camshaft oil seal. Be sure to apply engine oil to the oil seal lip, Insert the oil seal along the camshaft front end and install by driving the installer with a hammer until the oil seal is fully seated.





7. Install the camshaft sprocket bolts to the specified torque.
Tightening torque
Camshaft sprocket bolt 80 - 100 Nm (800 - 1000 kg.cm, 59 - 74 ft. lbs.)
8. Align the camshaft sprocket and crankshaft sprocket timing marks. Place the piston in the No.1 cylinder to top dead center on the compression stroke.





9. Install the cylinder head cover.
Tightening torque
Cylinder head cover bolts 8 - 10 Nm (80 - 100 kg.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.
Tightening torque
Timing belt cover: 8 - 10 Nm (80 - 100 kg.cm, 6 - 7 ft. lbs.)
13. Install the coolant pump pulley and crankshaft pulley