2.
Remove the coolant pump pulley and crankshaft pulley.
Disconnect the breather hose and the P.C.V. hose.
Remove the coolant pump pulley and crankshaft pulley.
Remove the timing belt cover.
Loosen the timing belt tensioner pulley and temporarily secure it.
Remove the timing belt from the camshaft sprocket.
Loosen the center cover bolts and then remove the center cover.
Remove the ignition coil assembly.
Loosen the cylinder head cover bolts and then remove the cylinder head cover.
Remove the camshaft sprocket.
Remove the camshaft bearing caps and timing chain.
Remove the camshaft.
Remove the HLA.
Check the camshaft journals for wear. If the journals are badly worn, replace the camshaft.
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 in.)
Exhaust : 43.8489 mm (1.7263 in.)
Limit
Intake : 42.9484 mm (1.6909 in.)
Exhaust : 43.3489 mm (1.7066 in.)
Check the cam surface for abnormal wear or damage, and replace if necessary.
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 (0.0039 - 0.0079 in.)
Check the lips for wear. If the lip threads are worn, replace.
Check the oil seal lip contacting surface of the camshaft. If it is worn, replace the camshaft.
Problem | Possible cause | Action |
Temporary noise on starting a cold engine. | Normal | This noise will disappear after the oil in the engine has reached normal pressure. |
Continuous noise when engine is running after sitting more than 48 hours. | Oil leakage of the high pressure chamber on HLA, allowing air to get in. | Noise will disappear within 15 minutes when engine runs at 2000~3000 rpm If it doesn't disappear, refer to item 7 below |
Continuous noise when engine is first started after rebuilding cylinder head. | Insufficient oil in cylinder head oil gallery. | |
Continuous noise when engine is running after excessive cranking. | Oil drain out of the high-pressure chamber in HLA, allowing air to get in. Insufficient oil in HLA. | |
Continuous noise when engine is running after changing HLA. | caution Do not run engine at a speed higher than 3000 rpm as this may damage HLA. | |
Continuous noise during idle after high speed running. | Engine oil level toohigh or too low. | Check oil level. Drain or add oil as necessary. |
Excessive amount of air in the oil at high engine speed. | Check oil supply system | |
Deteriorated oil | Check oil quality. | |
Noise continuous for more than 15 minutes. | Low oil pressure | Check oil pressure and oil supply system of each part of engine |
Faulty HLA. | Remove the cylinder head cover and press down on the HLA by hand. If it move, replace HLA. caution Be careful of hot HLA. |
Install the HLA.
Align the camshaft timing chain with intake timing chain sprocket and exhaust timing chain sprocket as shown.
Install the camshaft after lubricating the camshaft journals with engine oil.
Install the bearing caps. The markings on the caps are for intake/exhaust identification.
I: Intake camshaft
E: Exhaust camshaft
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 lb.ft)
Using the special tool, camshaft oil seal installer (09221 - 21000), press fit the camshaft oil seal. Be susre 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.
Install the camshaft sprocket bolts to the specified torque.
Tightening torque
Camshaft sprocket bolt
80 ~ 100Nm (800 ~ 1000 kg.cm, 59 ~ 74 lb.ft)
Align the camshaft sprocket and crankshaft sprocket timing marks. Place the poston in the No.1 cylinder to top dead center on the compression strokie.
Install the cylinder head cover.
Tightening torque
Cylinder head cover bolts :
8 ~ 10 Nm (80 ~ 100 kg.cm, 6 ~ 7 lb.ft)
Install the spark plug cables, ignition coil assembly and cylinder head center cover.
Install the timing belt and then tighten the timing belt tensioner pulley.
Install the timing belt cover.
Tightening torque
Timing belt cover : 8 ~ 10Nm (80 ~ 100 kg.cm, 6 ~ 7 lb.ft)
Install the coolant pump pulley and crankshaft pulley.
