CAMSHAFT (for Bank 2): Installation

Fig 1: Identifying Flange Bolt And Straight Pin

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1. Apply engine oil to the camshaft journals, camshaft housing sub-assembly LH and camshaft bearing caps.
2. Install the No. 3 camshaft and No. 4 camshaft to the camshaft housing sub-assembly LH.
3. Make sure of the marks and numbers on the camshaft bearing caps and place them in each proper position and direction.
   Fig 2: Identifying Marks And Numbers On Camshaft Bearing Caps

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4. Temporarily tighten the 8 bolts in the order shown in the illustration.

   Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf) 

   Fig 3: Identifying Camshaft Bearing Bolts Tighten Sequence

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1. Make sure that the valve rocker arm is installed as shown in the illustration.
   Fig 4: Identifying Valve Rocker Arm

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2. Apply seal packing in a continuous line as shown in the illustration.

   Seal packing: 

   Toyota Genuine Seal Packing Black, Three Bond 1207B or equivalent 

   Seal diameter: 

   3.5 to 4.5 mm (0.138 to 0.177 in.) 

   NOTE:

   • Remove any oil from the contact surface.
   • Install the camshaft housing sub-assembly LH within 3 minutes.
   • Do not start the engine for at least 2 hours after installing.
     Fig 5: Identifying Camshaft Housing Seal Packing Area

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3. Install the camshaft housing sub-assembly LH and tighten the 13 bolts in the order shown in the illustration.

   Torque: 28 N*m (286 kgf*cm, 21 ft.*lbf) 

   NOTE:

   • When installing the camshaft housing LH, it is necessary to correctly position the camshafts as shown in the illustration. Failure to correctly position these parts may result in damage due to contact between the pistons and valves. If a camshaft is rotated with a piston at TDC, valve contact will occur.
   • If any of the bolts are loosened during installation, remove the camshaft housing, clean the installation surfaces, and reapply seal packing.
   • If the camshaft housing is removed because any of the bolts are loosened during installation, make sure that the previously applied seal packing does not enter any oil passages.
     Fig 6: Identifying Camshaft Housing Bolt Tighten Sequence

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4. Tighten the 8 bolts in the order shown in the illustration.

   Torque: 16 N*m (163 kgf*cm, 12 ft.*lbf) 

   Fig 7: Locating Camshaft Housing Bolts

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1. Install the No. 3 chain tensioner assembly with the bolt.

   Torque: 21 N*m (214 kgf*cm, 15 ft.*lbf) 

2. While pushing in the tensioner, insert a pin of 1.0 mm (0.0394 in.) diameter into the hole to hold it.
   Fig 8: Installing No 3 Chain Tensioner

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1. Align the mark plates (yellow) with the timing marks of the camshaft timing gear assemblies as shown in the illustration.
2. Apply a light coat of engine oil to the bolt threads and bolt-seating surface.
3. Align the knock pin of the camshaft with the pin hole of the camshaft timing gear assembly. Install the camshaft timing gear assembly and camshaft timing exhaust gear LH with the No. 2 chain sub-assembly installed.
   Fig 9: Identifying Camshaft Timing Mark

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4. Using SST to hold the hexagonal portion of each camshaft, tighten the flange bolts of the camshaft timing gear assembly and the camshaft timing exhaust gear assembly LH.

   SST 09922-10010 

   Torque: 100 N*m (1020 kgf*cm, 74 ft.*lbf) 

5. Remove the pin from the No. 3 chain tensioner assembly.
   Fig 10: Tightening Flange Bolts Of Camshaft Timing Gear Assembly

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HINT:

See INSTALLATION  .