ENGINE UNIT > DISASSEMBLY

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HINT:

1. Thoroughly clean all parts to be assembled.
   
2. Before installing the parts, apply new engine oil to all sliding and rotating surfaces.
   
3. Replace all gaskets, O-rings and oil seals with new parts.
   

1. Remove the 2 bolts and No. 1 engine hanger.
   

1. Remove the 2 bolts and No. 2 engine hanger.
   

1. Remove the bolt and pull out the oil dipstick.
   

2. Remove the O-ring from the oil level gauge guide.
   

1. Remove the 2 water drain cocks.
   

1. Remove the 2 bolts and 2 sensors.
   

1. Remove the bolt and crankshaft position sensor.
   

1. Remove the plug, filter and gasket from each cylinder head.
   

1. Remove the 10 bolts, 3 seal washers, 2 nuts, head cover and gasket.
   

1. Remove the 10 bolts, 3 seal washers, 2 nuts, cylinder head cover and gasket.
   

2. Remove the ventilation valve from the cylinder head cover.
   

1. Turn the crankshaft pulley, and align its groove with the timing mark 0 of the timing chain cover.
   

2. 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.
   

3. Using SST, hold the crankshaft pulley and loosen the pulley set bolt.
   

   SST

   09213-54015   (91651-60855)
   09330-00021  
   

4. Using the pulley set bolt and SST, remove the crankshaft pulley.
   

   SST

   09950-50013   (09951-05010, 09952-05010, 09953-05020, 09954-05030)
   

1. Remove the drain plug and gasket.
   

1. Remove the 10 bolts and 2 nuts.
   

2. Insert the blade of SST between the oil pans, cut off applied sealer and remove the No. 2 oil pan.
   

   SST

   09032-00100  
   

   NOTICE:

   1. Be careful not to damage the contact surface of the No. 2 oil pan and oil pan.
      
   2. Be careful not to damage the No. 2 oil pan flange.
      

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

1. Remove 17 bolts and 2 nuts.
   

2. Using a screwdriver, remove the oil pan by prying between the oil pan and cylinder block in the sequence shown.
   

   NOTICE:

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

3. Remove the O-ring from the timing chain cover.
   

1. Remove the 17 bolts, water pump and gasket.
   

1. Remove the 15 bolts and 2 nuts.
   

2. Remove the timing chain cover by prying the portions 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 timing chain cover, cylinder block and cylinder head.

3. Remove the O-ring from the LH cylinder head.
   

NOTICE:

1. Never rotate the crankshaft with the chain tensioner removed.
   
2. When rotating the camshaft with the timing chain removed, rotate the crankshaft counterclockwise 40° from the TDC before rotating it.
   

1. While rotating the stopper plate of the tensioner upward, push in the plunger of the chain tensioner as shown in the illustration.
   

2. While rotating the stopper plate of the tensioner downward, insert a bar of diameter of 3.5 mm (0.138 in.) into the holes in the stopper plate and tensioner to fix the stopper plate.
   

3. Remove the 2 bolts and chain tensioner.
   

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

1. Remove the 2 chain vibration dampers.
   

1. Remove the 2 bolts and No. 1 chain vibration damper.
   

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

2. Hold the hexagonal portion of the camshaft with a wrench, and remove the 2 bolts, camshaft timing gear, camshaft timing gear assembly and No. 2 timing chain.
   

   NOTICE:

   1. Be careful not to damage the cylinder head and valve lifter with the wrench.
      
   2. Do not disassemble the camshaft timing gear assembly.
      

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

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

2. Hold the hexagonal portion of the camshaft with a wrench, and remove the 2 bolts, camshaft timing gear, camshaft timing gear assembly and No. 2 timing chain.
   

   NOTICE:

   1. Be careful not to damage the cylinder head and valve lifter with the wrench.
      
   2. Do not disassemble the camshaft timing gear assembly.
      

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

NOTICE:

As the thrust clearance of the camshaft is small, the camshaft must be kept level while it is being removed. If the camshaft is not kept level, the portion of the cylinder head which received the shaft thrust may crack or be damaged, causing the camshaft to seize or break. To avoid this, the following steps should be carried out.

1. Remove the camshafts of the RH bank.
   
   

   1. Rotate the camshafts counterclockwise using hexagonal portion of the each camshaft so that the cam lobes of the No. 1 cylinder may face as shown in the illustration.
      

   
   
   

   2. Uniformly loosen and remove the 16 bearing cap bolts in several passes, in the sequence shown.
      

   3. Remove the 8 bearing caps and 2 camshafts.
      

2. Remove the camshafts of the LH bank.
   
   

   1. Uniformly loosen and remove the 16 bearing cap bolts in several passes, in the sequence shown.
      

   2. Remove the 8 bearing caps and 2 camshafts.
      

1. Remove the 2 cylinder head bolts on the LH cylinder head in several passes, in the sequence shown.
   

2. Using a 10 mm bi-hexagon wrench, uniformly loosen the 8 cylinder head bolts on each cylinder head, in several passes, in the sequence shown, then repeat for the other side as shown. Remove the 16 cylinder head bolts and plate washers.
   

   NOTICE:

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

3. Lift the cylinder head from the dowels on the cylinder block, and place the 2 cylinder heads on wooden blocks on a bench.
   

   NOTICE:

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

   HINT:

   If the cylinder head is difficult to lift off, pry between the cylinder head and cylinder block with a screwdriver.

4. Remove the RH and LH cylinder head gaskets.
   

1. Separate the knock sensor wire.
   

2. Remove the bolt, 2 nuts and water outlet pipe.
   

1. Disconnect the knock sensor connectors.
   

2. Remove the 2 bolts and 2 knock sensors.
   

1. Remove the 5 bolts and 2 nuts.
   

2. Using a screwdriver, remove the oil seal retainer by prying the portions between the oil seal retainer and crankshaft bearing cap.
   

HINT:

Arrange the valve lifter in the correct order.

HINT:

Arrange the valves, inner compression springs, valve spring retainers and valve spring retainer rocks in the correct order.

1. Place the cylinder head on the wooden block.
   

2. Using SST, compress the inner compression spring and remove the 2 valve spring retainer locks.
   

   SST

   09202-70020   (09202-00010)
   

3. Remove the valve, inner compression spring and valve spring and valve spring retainer.
   

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

1. Using a needle-nose pliers, remove the valve stem oil seal.
   

1. Using a gasket scraper, remove all the gasket material from the cylinder block contact surface.
   

   NOTICE:

   Be careful not to scratch the cylinder block contact surface.

2. Using a wire brush, remove all the carbon from the combustion chambers.
   

   NOTICE:

   Be careful not to scratch the combustion chambers.

3. Using a valve guide bushing brush and solvent, clean all the valve guide bushes.
   

4. Using a soft brush and solvent, thoroughly clean the cylinder head.
   

1. Using a gasket scraper, chip off any carbon from the valve head.
   

2. Using a wire brush, thoroughly clean the valve.
   

1. Using SST, remove the 2 connecting rod cap bols.
   

   SST

   09011-38121  
   

2. Remove the connecting rod cap.
   

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

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

   HINT:

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

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

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

1. Using a small screwdriver, pry out the 2 snap rings.
   

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

2. Using a plastic-faced hammer and brass bar, 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.
      

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

2. Uniformly loosen and remove the 16 main bearing cap bolts in several passes, in the sequence shown.
   

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

   NOTICE:

   1. Pull up the main bearing cap little by little to the right and the left by turns.
      
   2. Be careful not to damage the joint surface of the cylinder block and the main bearing cap.
      

1. Using a 5 mm socket hexagon wrench, remove the 3 oil nozzles.