Camshaft (2AZ-FE): Replacement

1. Fix the camshaft with a wrench, and then loosen the sprocket bolt.
   NOTE: Be careful not to damage the valve lifter.
   Fig 1: Loosening Camshaft Sprocket Bolt

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2. Loosen and remove the bearing cap bolts on No. 2 camshaft (exhaust) in the sequence shown in the illustration in several passes, and remove the 5 bearing caps.
   Fig 2: Identifying Removal Sequence Of Camshaft Bearing Cap Bolts (Exhaust)

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3. Raise the No. 2 camshaft (exhaust) and remove it. Then remove the sprocket bolt.
4. Disconnect the camshaft timing sprocket (with the timing chain) from the No. 2 camshaft (exhaust).
5. Remove the camshaft timing sprocket from the timing chain.

Fig 3: Removing Camshaft Timing Sprocket From Timing Chain

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1. Loosen the bearing cap bolts on camshaft (intake) in the sequence shown in the illustration in several passes, and remove the caps.
2. Remove the camshaft.
   Fig 4: Identifying Removal Sequence Of Camshaft Bearing Cap Bolts (Intake)

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3. Tie the timing chain with a string.

Fig 5: [Tie Timing Chain With String]

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1. Fix the camshaft (intake) with a vise, and make sure that the camshaft timing gear does not rotate.
2. Cover all the paths with vinyl tape except the advanced side path shown in the illustration.
   Fig 6: Identifying Advanced Angle Side

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3. Using an air gun, apply about 150 kPa (1.5 kgf/cm² , 21 psi) of air pressure to the port on the advanced angle side.
   CAUTION: Some oil spraying will occur. Contain the spray with a shop rag.

   HINT:

   This operation releases the lock pin for the extreme retarded angle lock.

4. Under the condition above, check that the camshaft timing gear can be turned by hand to the advanced angle side (counterclockwise), the direction of the arrow in the illustration.
   1. Standard: Must turn 
   Fig 7: Applying Air Pressure To Port On Advanced Angle Side

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   HINT:

   The camshaft timing gear will turn to the advanced angle side without applying force by hand depending on the force of the air pressure applied. Also, if applying pressure to the oil path is difficult as a result of air leakage from the port, the lock pin may be difficult to be released.

5. Remove the fringe bolt from the camshaft timing gear.

Fig 8: Removing Fringe Bolt From Camshaft Timing Gear

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1. Put the camshaft timing gear and the camshaft (intake) together with the straight pin and key groove.
2. Turn the camshaft timing gear (as shown in the illustration) while pushing it lightly against the camshaft (intake). Push further at the position where the pin gets into the groove.
   NOTE: Be sure not to turn the camshaft timing gear to the retarded angle side (to the right direction).
   Fig 9: Installing Camshaft Timing Gear And Camshaft (Intake) Together With Straight Pin And Key Groove

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3. Check that there is no clearance between the gear's fringe and the camshaft (intake).
4. Tighten the fringe bolt with the camshaft timing gear fixed.
   1. Torque: 54 N.m (551 kgf.cm, 40 ft.lbf) 

   HINT:

   • Apply a light coat of engine oil on the threads and under the head of the bolt.
   • Length of sprocket bolt excluding bolt head: 40 mm (1.57 in.)
5. Check that the camshaft timing gear can move to the retarded angle side (to the right direction) and is locked at the extreme retarded angle.

1. Install the timing chain on the camshaft timing gear, with the painted mark of the link aligned with the timing marks of the camshaft timing sprocket.
   Fig 10: Aligning Paint Mark Of Timing Chain With Camshaft Timing Sprocket Timing Marks

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2. Examine the front marks and numbers of the 5 bearing caps and install them. Then install the 10 bearing cap bolts. Uniformly tighten the bolts in the sequence shown in the illustration.
   1. Torque: 
   2. 30 N.m (306 kgf.cm, 22 ft.lbf) for bearing cap No. 1 
   3. 9.0 N.m (92 kgf.cm, 80 in..lbf) for bearing cap No. 3 

HINT:

Apply a light coat of engine oil on the threads and under the heads of the bolts.

Fig 11: Identifying Tightening Sequence Of Camshaft Bearing Cap Bolts

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1. Put the camshaft on the cylinder head with the painted mark of the link of chain aligned with the timing mark of the camshaft timing sprocket.
   Fig 12: Aligning Paint Mark On Timing Chain With Camshaft Timing Sprocket Timing Mark

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2. Raising the camshaft, temporarily tighten the sprocket bolt.
   Fig 13: Tightening Camshaft Sprocket Bolt

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3. Examine the front marks and numbers of the 5 bearing caps and install them. Then install the 10 bearing cap bolts. Uniformly tighten the bolts in the sequence shown in the illustration.
   1. Torque: 
   2. 30 N.m (306 kgf.cm, 22 ft.lbf) for bearing cap No. 2 
   3. 9.0 N.m (92 kgf.cm, 80 in..lbf) for bearing cap No. 3 

   HINT:

   Apply a light coat of engine oil on the threads and under the heads of the bolts.

   Fig 14: Identifying Tightening Sequence Of Camshaft Bearing Cap Bolts

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4. Fix the camshaft with a wrench, and then tighten the sprocket bolt.
   1. Torque: 54 N.m (551 kgf.cm, 40 ft.lbf) 

   HINT:

   • Apply a light coat of engine oil on the threads and under the head of the bolt.
   • Length of sprocket bolt excluding bolt head: 25 mm (0.98 in.)
   NOTE: Be careful not to damage the valve lifter.
   Fig 15: Tightening Camshaft Sprocket Bolt

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5. As shown in the illustration, check the paint marks of the timing chain, camshaft timing gear and camshaft timing sprocket and the alignment of the pulley groove with timing mark of the chain cover.

Fig 16: Aligning Paint Marks Of Timing Chain, Camshaft Timing Gear And Camshaft Timing Sprocket

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1. Torque: 9.0 N.m (92 kgf.cm, 80 in..lbf) 

1. Torque: 19 N.m (194 kgf.cm, 14 ft.lbf)