Camshaft Removal

Remove the clip, 5 bolts and front bumper cover lower.

Remove the 4 bolts.

Unhook the No. 1 engine under cover sub-assembly from the vehicle body as shown in the illustration.

Remove the 13 clips and upper radiator support seal.

Remove the oil filler cap.

Remove the oil pan drain plug and gasket, and drain the oil into a container.

Detach the 3 clamps and disconnect the mass air flow meter connector.

Detach the 4 clamps.

Loosen the hose clamp and remove the air cleaner cap sub-assembly.

Disconnect the air pressure sensor connector.

Disconnect the vacuum hose from the air pressure sensor.

Detach the wire harness and vacuum hose from the intake air connector.

Disconnect the No. 2 ventilation hose.

Disconnect the vacuum hose.

Loosen the hose clamp.

Remove the 3 bolts and intake air connector.

Disconnect the reservoir hose from the radiator assembly.

Remove the 3 bolts and radiator reservoir.

Detach the claw to open the flexible hose clamp.

Loosen the 4 nuts holding the fluid coupling fan.

Remove the fan and generator V-belt (LandCruiser RM000000YMP02UX.html).

Remove the 2 bolts holding the fan shroud.

Remove the 4 nuts of the fluid coupling fan, and then remove the shroud together with the coupling fan.

NOTICE:

Be careful not to damage the radiator core.

Disconnect the 4 ignition coil connectors.

Remove the 4 bolts and 4 ignition coil assemblies.

Slide the clip and disconnect the PCV hose from the PCV valve sub-assembly.

Remove the 21 bolts, 2 nuts, 2 plate washers, 2 seal washers and cylinder head cover sub-assembly.

Remove the gasket from the cylinder head cover sub-assembly.

Remove the No. 1 camshaft bearing cap oil hole gasket from the cylinder head cover spacer.

Remove the 2 bolts and cylinder head cover connector sub-assembly.

Remove the No. 2 camshaft bearing cap oil hole gasket and 3 No. 3 camshaft bearing cap oil hole gaskets from the No. 1 camshaft bearing cap.

Remove the 2 bolts, timing chain guide and O-ring.

Turn the crankshaft pulley, and align its groove with the "0" timing mark of the timing chain cover sub-assembly.

Check that the timing marks of the camshaft timing gear and sprocket are aligned with the timing marks of the No. 1 bearing cap as shown in the illustration.

HINT:

If the timing marks do not align, rotate the crankshaft clockwise again and align the timing marks.

Place paint marks on the chain sub-assembly, camshaft timing gear assembly and camshaft timing exhaust gear assembly.

Remove the 2 bolts and timing chain cover plate from the timing chain or belt cover sub-assembly.

Remove the gasket from the timing chain cover plate.

Move the stopper plate upward to release the lock and push the plunger deep into the tensioner.

Move the stopper plate downward to set the lock and insert a hexagon wrench into the stopper plate hole.

Remove the bolt, nut, No. 1 chain tensioner assembly and gasket.

Uniformly loosen the 12 bolts and then remove the No. 1 camshaft bearing cap and 4 No. 2 camshaft bearing caps.

NOTICE:

Uniformly loosen the bolts while keeping the No. 2 camshaft level.

Move the camshaft in the direction shown in the illustration to loosen the chain sub-assembly, and then remove the No. 2 camshaft.

NOTICE:

Do not pry the No. 2 camshaft with a tool as an excessive amount of force may be applied to it.

Uniformly loosen the 8 bolts and then remove the 4 No. 2 camshaft bearing caps.

NOTICE:

Uniformly loosen the bolts while keeping the camshaft level.

Remove the camshaft while holding the chain sub-assembly.

NOTICE:

Do not pry the camshaft with a tool as an excessive amount of force may be applied to it.

Secure the chain sub-assembly with a string as shown in the illustration.

NOTICE:

Be careful not to drop anything inside the timing chain cover sub-assembly.

Check the lock of the camshaft timing gear assembly.

1. Using SST, grip the hexagonal portion, and then secure SST and camshaft in a vise as shown in the illustration and check that the camshaft timing gear assembly does not rotate.
   

   SST

   09212-31010
   

   Text in Illustration

   *a	Hexagonal Portion

   NOTICE:

   1. Do not damage the camshaft.
      
   2. Never grip areas other than the hexagonal portion, as this may cause damage.
      

Release the lock pin.

1. Clean the camshaft journal with non-residue solvent.
   





2. Cover the 4 oil paths of the cam journal with vinyl tape as shown in the illustration.
   

   Text in Illustration

   *a	Retard Side Path
   *b	Advance Side Path
   *c	Open
   *d	Close
   	Rubber Piece
   	Vinyl Tape

   HINT:

   1 retard side path and 1 advance side path are provided in the groove of the camshaft. Plug one of the paths with a rubber piece.

3. Break through the tape over the advance side path, and then break through the tape over the retard side path on the opposite side from the hole over the advance side path as shown in the illustration.
   





4. Apply compressed air at approximately 200 kPa (2.0 kgf/cm², 28 psi) to the 2 open paths accessible through the holes in the tape.
   

   Text in Illustration

   *a	Retard Side Path
   *b	Advance Side Path

   NOTICE:

   Cover the paths with a piece of cloth when applying pressure to keep oil from splashing.





5. Check that the camshaft timing gear assembly revolves in the advance direction when reducing the air pressure applied to the retard side path.
   

   OK:

   Gear rotates in the advance direction.
   

   Text in Illustration

   *a	Retard Side Path
   *b	Advance Side Path
   *c	Decompress
   *d	Hold Pressure

   HINT:

   This operation releases the lock pin which holds the timing gear in the most retarded position.

6. When the camshaft timing gear assembly reaches the most advanced position, release the air pressure from the retard side path and advance side path in that order.
   

   NOTICE:

   1. Do not release the air pressure from the advance side path first. The gear may abruptly shift in the retard direction and break the lock pin.
      
   2. When releasing the air pressure from the advance side path, release it slowly.
      

Check for smooth rotation.

1. Rotate the camshaft timing gear assembly within its movable range several times, but do not turn it to the most retarded position. Check that the gear rotates smoothly.
   

   CAUTION:

   Do not use air pressure to perform the smooth operation check.

Check the lock in the most retarded position.

1. Confirm that the camshaft timing gear assembly becomes locked at the most retarded position.
   

Using SST, grip the hexagonal portion, and then secure SST and camshaft in a vise as shown in the illustration.

SST

09212-31010

NOTICE:

1. Do not damage the camshaft.
   
2. Never grip areas other than the hexagonal portion, as this may cause damage.
   

Remove the flange bolt and camshaft timing gear assembly.

NOTICE:

1. Be sure not to remove the other 3 bolts.
   
2. If planning to reuse the gear, be sure to release the straight pin lock before installing the gear.
   

Check the lock of the camshaft timing exhaust gear assembly.

1. Using SST, grip the hexagonal portion, and then secure SST and No. 2 camshaft in a vise as shown in the illustration and check that the camshaft timing exhaust gear assembly does not rotate.
   

   SST

   09212-31010
   

   Text in Illustration

   *a	Hexagonal Portion

   NOTICE:

   1. Do not damage the No. 2 camshaft.
      
   2. Never grip areas other than the hexagonal portion, as this may cause damage.
      

Release the lock pin.

1. Clean the No. 2 camshaft journal with non-residue solvent.
   

2. Cover the 4 oil paths of the cam journal with vinyl tape as shown in the illustration.
   

   Text in Illustration

   *a	Retard Side Path
   *b	Advance Side Path
   *c	Open
   *d	Close
   	Rubber Piece
   	Vinyl Tape

   HINT:

   There are 4 oil paths in the grooves of the No. 2 camshaft. Plug 2 paths with pieces of rubber.

3. Break through the tape over the advance side path, and then break through the tape over the retard side path on the opposite side from the hole over the advance side path as shown in the illustration.
   





4. Apply compressed air at approximately 200 kPa (2.0 kgf/cm², 28 psi) to the 2 open paths (the advance side path and retard side path).
   

   Text in Illustration

   *a	Retard Side Path
   *b	Advance Side Path

   NOTICE:

   Cover the paths with a piece of cloth when applying pressure to keep oil from splashing.

   HINT:

   The lock pin is released in this condition.





5. Check that the camshaft timing exhaust gear assembly turns in the retard direction when reducing the air pressure applied to the advance side path.
   

   Text in Illustration

   *a	Retard Side Path
   *b	Advance Side Path
   *c	Decompress
   *d	Hold Pressure

   HINT:

   The lock pin is released and the camshaft timing exhaust gear assembly turns in the retard direction.

6. When the camshaft timing exhaust gear assembly moves to the most retarded position, release the air pressure from the advance side path, and then release the air pressure from the retard side path.
   

   NOTICE:

   Be sure to release the air pressure from the advance side path first. If the air pressure of the retard side path is released first, the camshaft timing exhaust gear assembly may abruptly shift in the advance direction and break the lock pin or other parts.

Check for smooth rotation.

1. Turn the camshaft timing exhaust gear assembly within its movable range (21.5 to 23.5°) 2 or 3 times, but do not turn it to the most advanced position. Make sure that the gear turns smoothly.
   

   NOTICE:

   When the air pressure is released from the advance side path and then from the retard side path, the gear automatically returns to the most advanced position due to the advance assist spring operation, and locks. Gradually release the air pressure from the retard side path before performing the smooth rotation check.

Check the lock at the most advanced position.

1. Make sure that the camshaft timing exhaust gear assembly locks at the most advanced position.
   

Using SST, grip the hexagonal portion, and then secure SST and No. 2 camshaft in a vise as shown in the illustration.

SST

09212-31010

NOTICE:

1. Do not damage the No. 2 camshaft.
   
2. Never grip areas other than the hexagonal portion, as this may cause damage.
   

Remove the flange bolt and camshaft timing exhaust gear assembly.

NOTICE:

Be sure not to remove the other 4 bolts.