ENGINE UNIT > DISASSEMBLY

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1. Remove the oil filler cap and gasket.
   

1. Remove the spark plugs.
   

1. Remove the drain plug and gasket.
   

1. Remove the ventilation valve.
   

1. Remove the 4 bolts and 4 sensors.
   

1. Remove the 4 bolts and 4 oil control valves.
   

1. Remove the bolt and sensor.
   

1. Remove the 2 oil pipe unions and oil pipe.
   

2. Remove the oil control valve filter LH and gaskets.
   

1. Remove the bolt.
   

2. Remove the 2 oil pipe unions and oil pipe.
   

3. Remove the oil control valve filter RH and gaskets.
   

1. Remove the water drain cocks from the cylinder block.
   

2. Remove the water drain cock plugs from the water drain cocks.
   

1. Remove the drain plug.
   

   NOTICE:

   Do not remove the O-ring from the oil filter cap.

2. Connect the hose to the pipe.
   

3. Insert the pipe with the hose into the oil filter cap.
   

4. Make sure that the oil is completely drained and remove the pipe and O-ring.
   

5. Using SST, remove the oil filter cap.
   

   SST

   09228-06501  
   

6. Remove the oil filter element and O-ring from the oil filter cap.
   

   NOTICE:

   Do not use any tools when removing the O-ring to prevent the O-ring groove from being damaged.

1. Using SST, loosen the crankshaft pulley bolt.
   

   SST

   09213-70011   (09213-70020)
   09330-00021  
   

2. Using SST, remove the crankshaft pulley bolt and crankshaft pulley.
   

   SST

   09950-50013   (09951-05010, 09952-05010, 09953-05020, 09954-05021)
   

1. Remove the 6 bolts and engine mounting bracket.
   

2. Using "Torx" socket wrench E8, remove the 2 stud bolts.
   

1. Remove the 2 nuts, water inlet and thermostat.
   

2. Remove the gasket.
   

3. Remove the housing plug.
   

4. Remove the housing drain cock.
   

5. Remove the 2 stud bolts.
   

6. Separate the water by-pass hose No. 1.
   

7. Remove the 2 bolts, nut, and water inlet housing.
   

8. Remove the 2 O-rings.
   

1. Remove the 2 bolts, 4 nuts and water outlet.
   

2. Remove the 2 gaskets and O-ring.
   

1. Remove the 12 bolts, seal washer, head cover and gasket.
   

2. Remove the 3 gaskets.
   

1. Remove the 12 bolts, seal washer, head cover and gasket.
   

   NOTICE:

   The baffle plate is located on the back of the portion shown in the illustration. Do not damage the baffle plate when removing the head cover.

2. Remove the 3 gaskets.
   

1. Remove the 16 bolts and 2 nuts.
   

2. Insert the blade of SST between the oil pans. Cut through the applied sealer and remove the No. 2 oil pan sub-assembly.
   

   SST

   09032-00100  
   

   NOTICE:

   Be careful not to damage the contact surfaces of the oil pans.

3. Using "Torx" socket wrench E6, remove the 2 stud bolts.
   

1. Remove the bolt, 2 nuts, oil strainer and gasket.
   

2. Using "Torx" socket wrench E6, remove the 2 stud bolts.
   

1. Remove the 16 bolts and 2 nuts.
   

   HINT:

   Be sure to clean the bolts and stud bolts and check the threads for cracks or other damage.

2. Remove the oil pan by prying between the oil pan and cylinder block with a screwdriver.
   

   NOTICE:

   Be careful not to damage the contact surfaces of the cylinder block and oil pan.

   HINT:

   Tape the screwdriver tip before use.

3. Remove the 2 O-rings.
   

4. Using "Torx" socket wrench E8, remove the 2 stud bolts.
   

1. Remove the 7 bolts and baffle plate.
   

1. Remove the 6 bolts.
   

2. Using a screwdriver, pry out the oil seal retainer.
   

   NOTICE:

   Be careful not to damage the engine rear oil seal retainer.

   HINT:

   Tape the screwdriver tip before use.

1. Place the oil seal retainer on wooden blocks.
   

   NOTICE:

   Be careful not to damage the engine rear oil seal retainer.

2. Using a screwdriver and a hammer, tap out the oil seal.
   

   HINT:

   Tape the screwdriver tip before use.

1. Remove the 16 bolts, water pump and gasket.
   

1. Remove the 15 bolts and 2 nuts as shown in the illustration.
   

2. Remove the timing chain cover by prying between the timing chain cover and cylinder head or cylinder block with a screwdriver.
   

   NOTICE:

   Be careful not to damage the contact surfaces of the cylinder head, cylinder block and chain cover.

   HINT:

   Tape the screwdriver tip before use.

3. Remove the 4 bolts, chain cover plate and gasket.
   

4. Remove the gasket.
   

1. Using a screwdriver, pry out the oil seal.
   

   HINT:

   Tape the screwdriver tip before use.

1. Temporarily tighten the pulley set bolt.
   

2. Set the timing mark on the crank angle sensor plate to the RH block bore center line (TDC / compression).
   

3. Check that the timing marks of the camshaft timing gears are aligned with the timing marks of the bearing cap as shown in the illustration.
   If not, turn the crankshaft 1 revolution (360°) and align the timing marks as above.
   

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

2. Move the stopper plate downward to set the lock, and insert a pin of φ1.27 mm (0.05 in.) into the stopper plate's hole.
   

3. Remove the 2 bolts and chain tensioner.
   

1. Remove the chain tensioner slipper.
   

1. Turn the crankshaft counterclockwise 10° to loosen the chain of the crankshaft timing sprocket.
   

2. Remove the pulley set bolt.
   

3. Remove the chain from the crankshaft timing sprocket and place it on the crankshaft.
   

4. Turn the camshaft timing gear assembly on the RH bank clockwise (approximately 60°) and set it as shown in the illustration. Be sure to loosen the chain between the banks.
   

5. Remove the chain.
   

1. Using a 10 mm hexagon wrench, remove the No. 2 idle gear shaft, sprocket and No. 1 idle gear shaft.
   

1. Remove the 2 bolts and vibration damper.
   

1. Remove the 2 vibration dampers.
   

1. Remove the crankshaft timing sprocket from the crankshaft.
   

2. Remove the 2 pulley set keys from the crankshaft.
   

1. While raising the No. 2 chain tensioner, insert a pin of φ 1.0 mm (0.039 in.) into the hole to fix the No. 2 chain tensioner.
   

2. Hold the hexagonal portion of the camshaft with a wrench, and remove the 2 bolts and 2 camshaft timing gear assemblies.
   

   NOTICE:

   1. Be careful not to damage the cylinder head with the wrench.
      
   2. Do not disassemble the camshaft timing gear assemblies.
      

3. Remove the No. 2 chain.
   

1. Remove the bolt and No. 2 chain tensioner.
   

1. Check that the camshafts are positioned as shown in the illustration.
   

2. Uniformly loosen and remove the 8 bearing cap bolts in the sequence shown in the illustration.
   

3. Uniformly loosen and remove the 12 bearing cap bolts in the sequence shown in the illustration.
   

   NOTICE:

   Uniformly loosen the bolts while keeping the camshaft level.

4. Remove the 5 bearing caps.
   

1. Remove the camshaft.
   

1. Remove the No. 2 camshaft.
   

1. Remove the camshaft housing sub-assembly RH by prying between the cylinder head and camshaft housing sub-assembly RH with a screwdriver.
   

   NOTICE:

   Be careful not to damage the contact surfaces of the cylinder head and camshaft housing.

   HINT:

   Tape the screwdriver tip before use.

1. While pushing down the No. 3 chain tensioner, insert a pin of φ 1.0 mm (0.039 in.) into the hole to fix the No. 3 chain tensioner.
   

2. Hold the hexagonal portion of the camshaft with a wrench, and remove the 2 bolts and 2 camshaft timing gear assemblies.
   

   NOTICE:

   1. Be careful not to damage the cylinder head with the wrench.
      
   2. Do not disassemble the camshaft timing gear assemblies.
      

3. Remove the No. 2 chain.
   

1. Remove the bolt and No. 3 chain tensioner.
   

1. Check that the camshafts are positioned as shown in the illustration.
   

2. Uniformly loosen and remove the 8 bearing cap bolts in the sequence shown in the illustration.
   

3. Uniformly loosen and remove the 13 bearing cap bolts in the sequence shown in the illustration.
   

   NOTICE:

   Uniformly loosen the bolts while keeping the camshaft level.

4. Remove the 5 bearing caps.
   

1. Remove the No. 3 camshaft.
   

1. Remove the No. 4 camshaft.
   

1. Remove the camshaft housing by prying between the cylinder head and camshaft housing with a screwdriver.
   

   NOTICE:

   Be careful not to damage the contact surfaces of the cylinder head and camshaft housing.

   HINT:

   Tape the screwdriver tip before use.

1. Remove the 24 valve rocker arms.
   

   HINT:

   Arrange the removed parts in the correct order.

1. Remove the 24 valve lash adjusters from the cylinder head.
   

   HINT:

   Arrange the removed parts in the correct order.

1. Using a 10 mm bi-hexagon wrench, uniformly loosen the 8 bolts in the sequence shown in the illustration. Remove the 8 cylinder head bolts and plate washers.
   

   NOTICE:

   1. Be careful not to drop washers into the cylinder head.
      
   2. Cylinder head warpage or cracking could result from removing bolts in an incorrect order.
      

   HINT:

   Be sure to keep separate the removed parts for each installation position.

2. Remove the cylinder head and gasket.
   

1. Uniformly loosen and remove the bolts in the sequence shown in the illustration.
   

2. Using a 10 mm bi-hexagon wrench, uniformly loosen the 8 bolts in the sequence shown in the illustration. Remove the 8 cylinder head bolts and plate washers.
   

   NOTICE:

   1. Be careful not to drop washers into the cylinder head.
      
   2. Cylinder head warpage or cracking could result from removing bolts in an incorrect order.
      

   HINT:

   Be sure to keep separate the removed parts for each installation position.

3. Remove the cylinder head and gasket.
   

1. Separate the No. 1 water by-pass hose.
   

2. Remove the 2 bolts and water inlet pipe.
   

1. Remove the valve stem caps from the cylinder heads.
   

   HINT:

   Arrange the removed parts in the correct order.

1. Using SST, compress the compression spring and remove the valve spring retainer locks.
   

   SST

   09202-70020   (09202-00010)
   

2. Remove the retainer, compression spring and valve.
   

   HINT:

   Arrange the removed parts in the correct order.

1. Using SST, compress the compression spring and remove the valve spring retainer locks.
   

   SST

   09202-70020   (09202-00010)
   

2. Remove the retainer, compression spring and valve.
   

   HINT:

   Arrange the removed parts in the correct order.

1. Using needle-nose pliers, remove the oil seals.
   

1. Using compressed air and a magnetic finger, remove the valve spring seats by blowing air onto them.
   

1. Using a 10 mm hexagon wrench, remove the 4 screw plugs and 4 gaskets.
   

   NOTICE:

   If water leaks from the straight screw plug or the plug corrodes, replace it.

1. Using a 14 mm hexagon wrench, remove the screw plugs and gaskets.
   

   NOTICE:

   If water leaks from the straight screw plug or the plug corrodes, replace it.

NOTICE:

It is not necessary to remove the ring pin unless it is being replaced.

NOTICE:

If the stud bolt is deformed or the threads are damaged, replace it.

1. Heat the cylinder head to 80 to 100°C (176 to 212°F).
   

2. Place the cylinder head on wooden blocks.
   

3. Using SST and a hammer, tap out the guide bushes.
   

   SST

   09201-10000   (09201-01050)
   09950-70010   (09951-07100)
   

1. Heat the cylinder head to 80 to 100°C (176 to 212°F).
   

2. Place the cylinder head on wooden blocks.
   

3. Using SST and a hammer, tap out the guide bushes.
   

   SST

   09201-10000   (09201-01050)
   09950-70010   (09951-07100)
   

1. Check that the matchmarks on the connecting rod and cap are aligned.
   

   HINT:

   The matchmarks on the connecting rods and caps are for ensuring the correct reassembly.

2. Remove the 2 connecting rod cap bolts.
   

3. Using the 2 removed connecting rod cap bolts, remove the connecting rod cap and lower bearing by wiggling the connecting rod cap right and left.
   

   HINT:

   Keep the lower bearing inserted to the connecting rod cap.

4. Using a ridge reamer, remove all the carbon from the top of the cylinder.
   

5. Push the piston, connecting rod assembly and upper bearing through the top of the cylinder block.
   

   HINT:

   1. Keep the bearing, connecting rod and cap together.
      
   2. Arrange the piston and connecting rod assemblies in the correct order.
      

NOTICE:

Arrange the removed parts in the correct order.

1. Uniformly loosen and remove the 8 main bearing cap bolts and seal washers in the several steps and in the sequence shown in the illustration.
   

2. Uniformly loosen the 16 bearing cap bolts, in several steps and in the sequence shown in the illustration.
   

3. Using a screwdriver, pry out the main bearing caps. Remove the 4 main bearing caps and lower bearings.
   

   NOTICE:

   1. Push up on the cap little by little, from the right and left side alternately so that the cap can be removed.
      
   2. Be careful not to damage the joint surface of the cylinder block and the main bearing cap.
      

4. Remove the crankshaft.
   

HINT:

Arrange the removed parts in the correct order.

1. Remove the upper bearings and upper thrust washers from the cylinder block.
   

1. Using a piston ring expander, remove the 2 compression rings.
   

2. Remove the oil ring expander and 2 side rails by hand.
   

   HINT:

   Arrange the removed parts in the correct order.

1. Check the fitting condition between the piston and piston pin.
   
   

   1. Try to move the piston back and forth on the piston pin.
      If any movement is felt, replace the piston and pin as a set.
      

2. Disconnect the connecting rod from the piston.
   
   

   1. Using a screwdriver, pry off the snap rings from the piston.
      

   
   
   

   2. Gradually heat the piston to approximately 80°C (176°F).
      

   
   
   

   3. Using a brass bar and plastic hammer, lightly tap out the piston pin and remove the connecting rod.
      

      HINT:

      1. The piston and pin are a matched set.
         
      2. Arrange the pistons, pins, rings, connecting rods and bearings in the correct order.
         

3. Using a gasket scraper, remove the carbon from the piston top.
   

4. Using a groove cleaning tool or broken ring, clean the piston ring grooves.
   

5. Using solvent and a brush, thoroughly clean the piston.
   

   NOTICE:

   Do not use a wire brush.

1. Using a 5 mm hexagon wrench, remove the bolts and oil nozzles.
   

2. Check the 3 oil nozzles for damage or clogging.
   If necessary, replace the oil nozzle.