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Home >> Lexus Truck >> 2012 >> GX 460 V8-4.6L (1UR-FE) >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Engine >> Service and Repair >> Overhaul >> Disassembly

Disassembly





1UR-FE ENGINE MECHANICAL: ENGINE UNIT: DISASSEMBLY

1. REMOVE OIL FILTER ELEMENT Replacement

2. REMOVE ENGINE OIL PRESSURE SWITCH ASSEMBLY Removal

3. REMOVE OIL FILTER BRACKET SUB-ASSEMBLY Removal

4. REMOVE CRANKSHAFT PULLEY Removal

5. REMOVE OIL FILLER CAP SUB-ASSEMBLY

(a) Remove the oil filler cap.

(b) Remove the gasket from the oil filler cap.

6. REMOVE OIL FILLER CAP HOUSING

(a) Remove the 2 bolts, oil filler cap housing and gasket.





7. REMOVE SPARK PLUG Removal

8. REMOVE KNOCK SENSOR Removal

9. REMOVE VVT SENSOR Removal

10. REMOVE CAMSHAFT POSITION SENSOR Removal

11. REMOVE CRANKSHAFT POSITION SENSOR PROTECTOR Removal

12. REMOVE CRANKSHAFT POSITION SENSOR Removal

13. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

(a) for Bank 1:

Remove the 2 bolts and 2 camshaft oil control valves.





(b) for Bank 2:

Remove the 2 bolts and 2 camshaft oil control valves.





14. REMOVE CYLINDER BLOCK WATER DRAIN COCK SUB-ASSEMBLY

(a) Remove the 2 water drain cock plugs from the cylinder block water drain cocks.





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(b) Remove the 2 cylinder block water drain cocks from the cylinder block.

15. REMOVE WATER INLET HOUSING Removal

16. REMOVE FRONT WATER BY-PASS JOINT Removal

17. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY LH Removal

18. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY RH Removal

19. REMOVE OIL CONTROL VALVE FILTER

(a) for Bank 1:

Remove the 3 bolts, cylinder head cover spacer, gasket and oil control valve filter.





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(b) for Bank 2:

Remove the 3 bolts, cylinder head cover spacer, gasket and oil control valve filter.





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20. REMOVE SPARK PLUG TUBE GASKET

(a) Bend the 4 ventilation baffle plate claws on the cylinder head cover to an angle of 90° or more.





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(b) Using a screwdriver, pry out the gaskets.

HINT
* Be careful not to damage the gasket when removing it as the removed gasket needs to be used when installing a new one.
* Tape the screwdriver tip before use.

NOTICE:
Be careful not to damage the cylinder head cover.

21. REMOVE WATER PUMP ASSEMBLY Removal

22. REMOVE V-RIBBED BELT TENSIONER ASSEMBLY Removal

23. REMOVE TIMING CHAIN COVER SUB-ASSEMBLY Removal

24. REMOVE WATER INLET PIPE Removal

25. REMOVE FRONT CRANKSHAFT OIL SEAL

(a) Place the timing chain cover on wooden blocks.

(b) Place the oil pump on a wooden block.





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(c) Using a screwdriver and wooden block, pry out the front crankshaft oil seal.

HINT
Tape the screwdriver tip before use.

NOTICE:
Do not damage the surface of the front crankshaft oil seal press fit hole.

26. SET NO. 1 CYLINDER TO TDC/COMPRESSION

(a) Temporarily install the pulley set bolt.

(b) Rotate the crankshaft clockwise so that the timing marks on the crankshaft timing gear and camshaft timing gears are as shown in the illustration.

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





Text in Illustration





27. REMOVE NO. 1 CHAIN TENSIONER ASSEMBLY LH Removal

28. REMOVE CHAIN TENSIONER SLIPPER LH Removal

29. REMOVE NO. 1 CHAIN VIBRATION DAMPER LH Removal

30. REMOVE NO. 1 CHAIN SUB-ASSEMBLY LH Removal

31. REMOVE NO. 3 CHAIN TENSIONER ASSEMBLY Removal

32. REMOVE NO. 1 CHAIN TENSIONER ASSEMBLY RH Removal

33. REMOVE CHAIN TENSIONER SLIPPER RH Removal

34. REMOVE NO. 1 CHAIN VIBRATION DAMPER RH Removal

35. REMOVE NO. 1 CHAIN SUB-ASSEMBLY RH Removal

36. REMOVE NO. 2 CHAIN TENSIONER ASSEMBLY Removal

37. REMOVE CRANKSHAFT TIMING GEAR KEY

(a) Using a screwdriver, remove the 2 crankshaft timing gear keys from the crankshaft.





38. REMOVE CAMSHAFT BEARING CAP LH Removal

39. REMOVE NO. 3 CAMSHAFT SUB-ASSEMBLY Removal

40. REMOVE NO. 4 CAMSHAFT SUB-ASSEMBLY Removal

41. REMOVE CAMSHAFT HOUSING SUB-ASSEMBLY LH Removal

42. REMOVE CAMSHAFT BEARING CAP RH Removal

43. REMOVE NO. 1 CAMSHAFT SUB-ASSEMBLY Removal

44. REMOVE NO. 2 CAMSHAFT SUB-ASSEMBLY Removal

45. REMOVE CAMSHAFT HOUSING SUB-ASSEMBLY RH Removal

46. REMOVE NO. 1 VALVE ROCKER ARM SUB-ASSEMBLY Removal

47. REMOVE VALVE LASH ADJUSTER ASSEMBLY Removal

48. REMOVE VALVE STEM CAP Removal

49. REMOVE CYLINDER HEAD SUB-ASSEMBLY LH Removal

50. REMOVE NO. 2 CYLINDER HEAD GASKET

51. REMOVE CYLINDER HEAD SUB-ASSEMBLY Removal

52. REMOVE CYLINDER HEAD GASKET

53. REMOVE CYLINDER BLOCK WATER JACKET SPACER

(a) Remove the 2 cylinder block water jacket spacers from the cylinder block.





NOTICE:
Be sure to remove the cylinder block water jacket spacers. If not, they may fall and become damaged when the cylinder block is inverted.

54. REMOVE OIL RETURN PIPE GASKET

(a) Using a screwdriver, pry out the oil return pipe gasket.





Text in Illustration





HINT
Tape the screwdriver tip before use.

55. REMOVE VENTILATION PIPE GASKET

(a) Using a screwdriver, pry out the ventilation pipe gasket.





Text in Illustration





HINT
Tape the screwdriver tip before use.

56. REMOVE NO. 1 HEAT EXCHANGER COVER

(a) Remove the 12 bolts and 2 nuts.





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(b) Remove the No. 1 heat exchanger cover by prying between the No. 1 heat exchanger cover and cylinder block with a screwdriver.





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HINT
Tape the screwdriver tip before use.

57. REMOVE NO. 2 OIL PAN SUB-ASSEMBLY

(a) Remove the 12 bolts and 2 nuts.





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(b) Insert the blade of an oil pan seal cutter between the oil pans. Cut through the applied sealer and remove the No. 2 oil pan.





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

58. REMOVE NO. 1 OIL PAN SUB-ASSEMBLY

(a) Remove the 14 bolts and 2 nuts.





Text in Illustration





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

(b) Remove the No. 1 oil pan by prying between the No. 1 oil pan and cylinder block with a screwdriver.





Text in Illustration





HINT
Tape the screwdriver tip before use.

NOTICE:
Be careful not to damage the contact surfaces of the cylinder block and No. 1 oil pan.

59. REMOVE NO. 1 OIL PAN BAFFLE PLATE

(a) Remove the 7 bolts and No. 1 oil pan baffle plate.





60. REMOVE OIL STRAINER SUB-ASSEMBLY

(a) Remove the 2 bolts, oil strainer and O-ring.





61. REMOVE REAR ENGINE OIL SEAL RETAINER

(a) Remove the 6 bolts and rear engine oil seal retainer.





(b) Using a screwdriver, pry out the rear engine oil seal retainer.





HINT
Tape the screwdriver tip before use.

62. REMOVE REAR CRANKSHAFT OIL SEAL

(a) Place the rear engine oil seal retainer on wooden blocks.





Text in Illustration





(b) Using a screwdriver and hammer, tap out the rear crankshaft oil seal.

63. REMOVE OIL DRAIN PIPE SUB-ASSEMBLY

(a) Remove the bolt and oil drain pipe.





(b) Remove the O-ring.

64. REMOVE RING PIN

NOTICE:
It is not necessary to remove a ring pin unless it is being replaced.

65. REMOVE STUD BOLT

NOTICE:
If a stud bolt is deformed or its threads are damaged, replace it.

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