Disassembly

2AZ-FE ENGINE MECHANICAL: ENGINE UNIT: DISASSEMBLY

DISASSEMBLY

1. REMOVE IDLER PULLEY Removal

2. REMOVE OIL DIPSTICK
3. REMOVE OIL DIPSTICK GUIDE Removal

4. REMOVE MANIFOLD STAY Removal

5. REMOVE NO. 2 MANIFOLD STAY Removal

6. REMOVE NO. 1 EXHAUST MANIFOLD HEAT INSULATOR Removal

7. REMOVE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY Removal

8. REMOVE WATER INLET Removal

9. REMOVE THERMOSTAT
10. REMOVE NO. 1 WATER BY-PASS PIPE

(a) Remove the bolt, 2 nuts, pipe and gasket.
11. REMOVE NO. 3 WATER BY-PASS PIPE

(a) Remove the bolt, 2 nuts, pipe and gasket.
12. REMOVE V-RIBBED BELT TENSIONER ASSEMBLY Removal

13. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Removal

14. REMOVE KNOCK SENSOR Removal

15. REMOVE RADIO SETTING CONDENSER Disassembly

16. REMOVE OIL PRESSURE SWITCH ASSEMBLY Disassembly

17. REMOVE ENGINE COOLANT TEMPERATURE SENSOR Disassembly

18. REMOVE CAMSHAFT POSITION SENSOR Disassembly

19. REMOVE IGNITION COIL ASSEMBLY Removal

20. REMOVE SPARK PLUG

21. REMOVE OIL FILLER CAP SUB-ASSEMBLY

22. REMOVE OIL FILLER CAP GASKET
23. REMOVE VENTILATION VALVE SUB-ASSEMBLY Removal

24. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY Removal

25. REMOVE CYLINDER HEAD COVER GASKET
26. REMOVE OIL FILTER SUB-ASSEMBLY Replacement

27. REMOVE OIL FILTER UNION

(a) Using a 12 mm hexagon wrench, remove the oil filter union.
28. REMOVE CRANKSHAFT POSITION SENSOR Removal

29. REMOVE WATER PUMP PULLEY Removal

30. REMOVE WATER PUMP ASSEMBLY Removal

31. REMOVE OIL PAN DRAIN PLUG

(a) Remove the oil pan drain plug and gasket.
32. REMOVE OIL PAN SUB-ASSEMBLY Removal

33. REMOVE CRANKSHAFT PULLEY Removal

34. REMOVE NO. 1 CHAIN TENSIONER ASSEMBLY Removal

35. REMOVE TIMING CHAIN COVER SUB-ASSEMBLY Removal

36. REMOVE NO. 1 CRANKSHAFT POSITION SENSOR PLATE
37. REMOVE TIMING CHAIN GUIDE Removal

38. REMOVE CHAIN TENSIONER SLIPPER Removal

39. REMOVE NO. 1 CHAIN VIBRATION DAMPER Removal

40. REMOVE CHAIN SUB-ASSEMBLY

41. REMOVE CRANKSHAFT TIMING SPROCKET
42. REMOVE NO. 2 CHAIN SUB-ASSEMBLY Removal

43. REMOVE OIL PUMP DRIVE GEAR
44. REMOVE OIL PUMP ASSEMBLY Removal

45. REMOVE CAMSHAFT

(a) Using several steps, uniformly loosen and remove the 20 bearing cap bolts in the sequence shown in the illustration.
(b) Remove the 10 bearing caps, then remove the camshaft and No. 2 camshaft.
46. REMOVE CYLINDER HEAD SUB-ASSEMBLY Removal

47. REMOVE CYLINDER HEAD GASKET

48. REMOVE CYLINDER BLOCK WATER JACKET SPACER
(a) Using needle-nose pliers, remove the cylinder block water jacket spacer from the water jacket.
NOTE: Before turning the cylinder block upside down, make sure that the water jacket spacer is removed, as it will fall out.

49. REMOVE CYLINDER BLOCK WATER DRAIN COCK SUB-ASSEMBLY
50. REMOVE OIL CONTROL VALVE FILTER

(a) Using a 6 mm socket hexagon wrench, remove the plug and gasket.
(b) Remove the oil control valve filter.
51. INSPECT BALANCE SHAFT THRUST CLEARANCE

(a) Using a dial indicator, measure the thrust clearance while moving the balance shaft back and forth.
Standard thrust clearance:
0.05 to 0.09 mm (0.0020 to 0.0035 in.)
Maximum thrust clearance:
0.09 mm (0.0035 in.)
If the thrust clearance is greater than the maximum, replace the balance shaft housing and bearings. If necessary, replace the balance shaft.
52. INSPECT BALANCE SHAFT OIL CLEARANCE

(a) Using several steps, uniformly loosen and remove the 8 bolts in the sequence shown in the illustration.
(b) Remove the balance shaft housing from the crankcase.
HINT: Keep the lower bearing and balance shaft housing together.

(c) Lift out the No. 1 and No. 2 balance shafts.
HINT: Keep the upper bearing with the crankcase.

(d) Clean each bearing and journal.
(e) Check each bearing and journal for pitting and scratches.
If a bearing or journal is damaged, replace the bearings. If necessary, replace the balance shaft.

(f) Inspect the balance shaft housing bolt.
(1) Using a vernier caliper, measure the length of the bolts from the seat to the end.
Standard bolt length:
58.3 to 59.7 mm (2.295 to 2.350 in.)
Maximum bolt length:
60.3 mm (2.374 in.)
If the bolt length is greater than the maximum, replace the balance shaft bolt.
(g) Place the No. 1 and No. 2 balance shafts onto the crankcase.

(h) Lay a strip of Plastigage across each journal.
(i) Install the balance shaft housing.
(j) Apply a light coat of engine oil on the threads and under the heads of the bolts.

(k) Using several steps, uniformly install and tighten the 8 bolts in the sequence shown in the illustration.
Torque: 21.6 Nm (220 kgf-cm, 16 ft-lbf)

(l) Mark the front of the bolts with paint.
(m) Retighten the bolts 90° as shown in the illustration.
(n) Check that the paint mark is now at a 90° angle to the front.
(o) Remove the balance shaft housing from the crankcase.
(p) Measure the Plastigage at its widest point.
Standard oil clearance:
0.004 to 0.049 mm (0.0002 to 0.0019 in.)
Maximum oil clearance:
0.049 mm (0.0019 in.)
NOTE: Remove the Plastigage completely after the measurement.
If the oil clearance is greater than the maximum, replace the bearing. If necessary, replace the balance shaft.
HINT: If replacing a bearing, select a new one with the same number.

Standard balance shaft housing journal bore diameter:

Standard balance shaft journal diameter:
22.985 to 23.000 mm (0.9049 to 0.9055 in.)
Standard bearing center wall thickness:

53. REMOVE BALANCE SHAFT

54. REMOVE NO. 1 BALANCE SHAFT BEARING
55. REMOVE ENGINE REAR OIL SEAL

(a) Using a knife, cut off the lip of the oil seal.
(b) Using a screwdriver with its tip wrapped with tape, pry out the oil seal.
NOTE: After removing, check the crankshaft for damage. If damaged, smooth the surface with 400-grit sandpaper.

56. REMOVE STIFFENING CRANKCASE ASSEMBLY

(a) Using several steps, uniformly loosen and remove the 11 bolts in the sequence shown in the illustration.

(b) Remove the crankcase by prying the portions between the crankcase and cylinder block.
NOTE: Be careful not to damage the contact surfaces of the crankcase and cylinder bock.

(a) Using a dial indicator, measure the thrust clearance while moving the connecting rod back and forth.
Standard thrust clearance:
0.160 to 0.362 mm (0.0063 to 0.0143 in.)
Maximum thrust clearance:
0.362 mm (0.0143 in.)
If the thrust clearance is greater than the maximum, replace the connecting rod. If necessary, replace the crankshaft.
58. INSPECT CONNECTING ROD OIL CLEARANCE
NOTE: Do not turn the crankshaft during the measurement.

(a) Using marking paint, write the matched cylinder number on each connecting rod and cap.
HINT: The matchmarks in the connecting rods and caps are for ensuring correct reassembly.

(b) Using a 12 mm socket wrench, remove the 2 bolts and connecting rod cap.
(c) Clean the crank pin and bearing.
(d) Check the crank pin and bearing for pitting and scratches.

(e) Lay a strip of Plastigage on the crank pin.

(f) Check that the front mark of the connecting rod cap is facing in the correct direction.
(g) Apply a light coat of engine oil to the threads and under the heads of the connecting rod bolts.
(h) Using a 12 mm socket wrench, tighten the bolts in several passes to the specified torque.
Torque: 24.5 Nm (250 kgf-cm, 18 ft-lbf)

(i) Mark the front of the connecting rod bolts with paint.
(j) Retighten the cap bolts 90° as shown in the illustration.
(k) Check that the crankshaft turns smoothly.
(l) Using a 12 mm socket wrench, remove the 2 bolts and connecting rod cap.

(m) Measure the Plastigage at its widest point.
Standard oil clearance:
0.024 to 0.048 mm (0.0009 to 0.0019 in.)
Maximum oil clearance:
0.08 mm (0.0032 in.)
NOTE: Remove the Plastigage completely after the measurement.
If the oil clearance is greater than the maximum, replace the connecting rod bearing. If necessary, grind or replace the crankshaft.
HINT: If replacing a bearing, select a new one with the same number as marked on the connecting rod. There are 3 sizes of standard bearings, marked "1", "2" and "3" accordingly.

Standard connecting rod large end bore diameter:

Standard connecting rod bearing thickness:

Standard crankshaft pin diameter:
47.990 to 48.000 (1.8894 to 1.8898 in.)
59. REMOVE PISTON WITH CONNECTING ROD

(a) Using a ridge reamer, remove all the carbon from the top of the cylinder.
(b) Push the piston, connecting rod assembly and upper bearing through the top of the cylinder block.
HINT:
- Keep the bearing, connecting rod and cap together.
- Arrange the piston and connecting rod assemblies in the correct order.

60. REMOVE CONNECTING ROD BEARING
61. REMOVE PISTON RING SET

(a) Using a piston ring expander, remove the 2 compression rings.
(b) Remove the oil ring and expander by hand.
62. REMOVE PISTON PIN HOLE SNAP RING

(a) Using a small screwdriver, pry out the 2 snap rings.
63. REMOVE PISTON

(a) Gradually heat the piston up to 80 to 90°C (176 to 194°F).

(b) Using a plastic-faced hammer and brass bar, lightly tap out the piston pin, then remove the connecting rod.
- The piston and pin are a matched set.
- Arrange the piston, pin, ring, connecting rod and bearings in the correct order.

64. INSPECT CRANKSHAFT THRUST CLEARANCE

(a) Using a dial indicator, measure the thrust clearance while prying the crankshaft back and forth with a screwdriver.
Standard thrust clearance:
0.04 to 0.24 mm (0.0016 to 0.0095 in.)
Maximum thrust clearance:
0.30 mm (0.012 in.)
If the thrust clearance is greater than the maximum, replace the thrust washers as a set.
HINT: The thrust washer thickness is 1.93 to 1.98 mm (0.0760 to 0.0780 in.).

65. INSPECT CRANKSHAFT OIL CLEARANCE
NOTE: Do not turn the crankshaft during the measurement.

(a) Using several steps, uniformly loosen and remove the 10 bearing cap bolts in the sequence shown in the illustration.
(b) Remove the 5 bearing caps from the cylinder block.
HINT:
- Keep the No. 2 crankshaft bearings and crankshaft bearing caps together.
- Arrange the bearing caps in correct order.

(c) Remove the crankshaft.
HINT: Keep the crankshaft bearings and crankshaft thrust washer uppers together with the cylinder block.

(d) Clean each main journal and bearing.
(e) Check each main journal and bearing for pitting and scratches.
- If the journal or bearing is damaged, replace the bearings.
- If necessary, replace the crankshaft.

(f) Place the crankshaft onto the cylinder block.

(g) Lay a strip of Plastigage across each journal.

(h) Examine the front marks and numbers, and install the bearing caps onto the cylinder block in the order shown in the illustration.
(i) Apply a light coat of engine oil to the threads and under the heads of the crankshaft bearing cap set bolts.

(j) Using several steps, uniformly install and tighten the 10 bearing cap bolts in the sequence shown in the illustration.
Torque: 40 Nm (408 kgf-cm, 30 ft-lbf)

(k) Mark the front of the bearing cap bolts with paint.
(l) Retighten the 10 bearing cap bolts by 90°.
(m) Check that the paint marks are at a 90° angle to the front.

(n) Remove the crankshaft bearing caps.

(o) Measure the Plastigage at its widest point.
Standard oil clearance:
0.008 to 0.024 mm (0.0003 to 0.0010 in.)
Maximum oil clearance:
0.050 mm (0.0020 in.)
NOTE: Remove the Plastigage completely after the measurement.
If the oil clearance is greater than the maximum, replace the crankshaft bearing. If necessary, replace the crankshaft.
HINT: If replacing a bearing, select a new one with the same number. If the number of the bearing cannot be determined, calculate the correct bearing number by adding together the numbers imprinted on the cylinder block and crankshaft. Then select a new bearing with the calculated number. There are 4 sizes of standard bearings, marked "1", "2", "3" and "4" accordingly.

EXAMPLE
- Imprinted number on the cylinder block is 3.
- Imprinted number on the crankshaft is 4.
3 + 4 = 7
Select the bearing marked "3".
Standard cylinder block journal bore diameter:

Standard crankshaft journal diameter:

Standard bearing center wall thickness:

66. REMOVE CRANKSHAFT

(a) Using several steps, uniformly loosen and remove the 10 bearing cap bolts in the sequence shown in the illustration.
(b) Remove the 5 bearing caps from the cylinder block.
(c) Remove the crankshaft from the cylinder block.

67. REMOVE CRANKSHAFT THRUST WASHER UPPER

68. REMOVE CRANKSHAFT BEARING
HINT: Arrange the bearings in the correct order.

69. REMOVE NO. 2 CRANKSHAFT BEARING
HINT: Arrange the bearings in the correct order.

70. REMOVE NO. 1 OIL NOZZLE SUB-ASSEMBLY

(a) Remove the 4 bolts and 4 oil nozzles.