Engine Mechanical: Overview Lexus GX J120

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1. INSPECT COOLANT (SEE «COOLING SYSTEM (2UZ-FE)»(/lexus/gx/j120-2002-2009/remont/cooling-system-mechanical/#cooling) )
2. INSPECT ENGINE OIL (SEE «LUBRICATION SYSTEM (2UZ-FE)»(ref-228784-S21058866402006041100000) )
3. INSPECT BATTERY SPECIFIC GRAVITY (SEE «ON-VEHICLE INSPECTION»(/lexus/gx/j120-2002-2009/remont/charging-system/#starting-charging) )
4. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSY
5. INSPECT FAN AND GENERATOR V BELT HINT: As the belt tensioner coordinates belt tension automatically by its mechanism, you do not need to adjust it by yourself. Check that the indicator mark on the automatic tensioner is within the A range (Scheme 1) When the mark is out of the standard range, replace the V belt with a new one.
6. INSPECT V-RIBBED BELT TENSIONER ASSY (SEE «FAN AND GENERATOR V BELT (2UZ-FE)»(ref-228781-S05776457782007033000000) )
7. WARM UP ENGINE
8. INSPECT IGNITION TIMING When using the hand-held tester or OBD II scan tool: Connect the hand-held tester or OBD II scan tool to the DLC3. HINT: Refer to the hand-held tester or OBD II scan tool operator's manual for further details. Ignition timing: 5 to 15° BTDC at idle (Transmission in neutral) Disconnect the hand-held tester or OBD II scan tool from the DLC3. When not using the hand-held tester or OBD II scan tool: Remove the V-bank cover. Connect the tester probe of a timing light to the wire of the ignition coil connector for the No. 1 cylinder. Using SST, connect the tachometer probe to terminal TAC of the DLC3. SST 09843-18030 Using SST, connect terminals TC and CG of the DLC3. SST 09843-18040 Using the timing light, check the ignition timing. Ignition timing: 5 to 15° BTDC at idle (Transmission in neutral) Remove the SST from the DLC3. Disconnect the timing light from the engine. Install the V-bank cover.
9. INSPECT ENGINE IDLE SPEED When using the hand-held tester or OBD II scan tool: Connect the hand-held tester or OBD II scan tool to the DLC3. HINT: Refer to the hand-held tester or OBD II scan tool operator's manual for further details. Run the engine at 2,500 rpm for approx. 90 seconds. Check the idle speed. Idle speed: 700 +/- 50 rpm If the idle speed is not as specified, check the air intake system. Disconnect the hand-held tester or OBD II scan tool from the DLC3. When not using the hand-held tester or OBD II scan tool: Using SST, connect the tachometer probe to terminal TAC of the DLC3. SST 09843-18030 HINT: Refer to the hand-held tester operator's manual for further details. Run the engine at 2,500 rpm for approx. 90 seconds. Check the idle speed. Idle speed: 700 +/- 50 rpm Remove the SST from the DLC3. Disconnect the tachometer from the DLC3.
10. INSPECT COMPRESSION Remove the V-bank cover sub-assy. Remove the air cleaner hose assy. Disconnect the throttle control motor connector. Remove the 8 ignition coils. Remove the 8 spark plugs. Disconnect the 8 injector connectors. Inspect the cylinder compression pressure. Insert a compression gauge into the spark plug hole. Fully open the throttle forcibly by hand. While cranking the engine, measure the compression pressure. HINT: Always use a fully charged battery to obtain an engine speed of 250 rpm or more. Repeat steps ( 1 ) through ( 3 ) for each cylinder. NOTE: This measurement must be done as quickly as possible. Compression pressure: 1,373 kPa (14.0 kgf/cm 2, 199 psi) or more Minimum pressure: 1,030 kPa (10.5 kgf/cm 2, 149 psi) Difference between each cylinder: 98 kPa (1.0 kgf/cm 2, 14 psi) or less If the cylinder compression in one or more cylinders is low, pour a small amount of engine oil into the cylinder through the spark plug hole and repeat steps through ( 1 ) to ( 3 ) for the cylinders with low compression. If adding oil helps the compression, the piston rings and/or cylinder bore may be worn or damaged. If pressure stays low, a valve may be sticking, seating is improper, or there may be leakage past the gasket. Connect the 8 injector connectors. Install the 8 spark plugs. Install the 8 ignition coils. Connect the throttle control motor connector. Install the air cleaner hose assy. Install the V-bank cover sub-assy.
11. INSPECT CO/HC HINT: This check is used only to determine whether or not the idle CO/HC complies with regulations. Start the engine. Sustain the engine speed at 2,500 rpm for approx. 180 seconds. Insert the CO/HC meter testing probe at least 40 cm (1.3 ft) into the tailpipe during idling. Immediately check CO/HC concentration at idle and/or 2,500 rpm. HINT: When performing the 2 mode (2,500 rpm and idle) test, follow the measurement order prescribed by the applicable local regulations. If the CO/HC concentration does not comply with the regulations, troubleshoot in the order given below. Check the heated oxygen sensor operation (See «DTC P0136, P0137, P0138, P0156, P0157, P0158, OXYGEN SENSOR CIRCUIT MALFUNCTION/LOW VOLTAGE/HIGH VOLTAGE (BANK 1 SENSOR 2)/(BANK 2 SENSOR 2)»(/lexus/gx/j120-2002-2009/remont/testing-diagnostics/#sfi-system-2uz-fe-diagnostics) and «DTC P2195 OXYGEN (A/F) SENSOR SIGNAL STUCK LEAN (BANK 1 SENSOR 1); DTC P2196 OXYGEN (A/F) SENSOR SIGNAL STUCK RICH (BANK 1 SENSOR 1); DTC P2197 OXYGEN (A/F) SENSOR SIGNAL STUCK LEAN (BANK 2 SENSOR 1); DTC P2198 OXYGEN (A/F) SENSOR SIGNAL STUCK RICH (BANK»(/lexus/gx/j120-2002-2009/remont/testing-diagnostics/#sfi-system-2uz-fe-diagnostics) ). See «CO/HC SYMPTOMS»(ref-228781-S33168250582006062000000) for possible causes, then inspect and correct the applicable causes if necessary. CO/HC SYMPTOMS CO HC Symptom Cause Normal High Rough idle Faulty ignitions: Incorrect timing Fouled, shorted or improperly gapped plugs Incorrect valve clearance Leaky intake and exhaust valves Leaky cylinder Low High Rough idle (Fluctuating HC reading) Vacuum leaks: PCV hose Intake manifold Throttle body Lean mixture causing misfire High High Rough idle (Black smoke from exhaust) Restricted air filter Faulty SFI system: Faulty pressure regulator Defective ECT sensor Faulty ECM Faulty injector Faulty throttle position sensor Faulty MAF sensor

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1. REMOVE FAN AND GENERATOR V BELT Loosen the belt tension by turning the belt tensioner counterclockwise, and then remove the drive belt. HINT: The pulley bolt for the belt tensioner has left-hand thread.
2. INSPECT V-RIBBED BELT TENSIONER ASSY Remove the V belt from the tensioner pulley. Then check that nothing gets caught the tensioner by turning it clockwise and counterclockwise. When a malfunction exists, replace the tensioner.
3. INSTALL FAN AND GENERATOR V BELT Set the V belt onto every parts except the idler pulley No. 2 (Scheme 12) Loosen the V belt by turning the belt tensioner counterclockwise. Set the V belt to the idler pulley No. 2. After installing a new belt, check that the mark is within the B range (Scheme 13)

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1. DRAIN ENGINE COOLANT (SEE «COOLANT (2UZ-FE)»(/lexus/gx/j120-2002-2009/remont/cooling-system-mechanical/#cooling) )
2. SEPARATE BATTERY NEGATIVE TERMINAL
3. REMOVE V-BANK COVER SUB-ASSY
4. REMOVE ENGINE ROOM COVER SIDE
5. REMOVE ENGINE ROOM SIDE COVER LH
6. REMOVE AIR CLEANER HOSE ASSY
7. REMOVE RADIATOR SUPPORT SEAL UPPER
8. REMOVE FAN AND GENERATOR V BELT (SEE «FAN AND GENERATOR V BELT (2UZ-FE)»(ref-228781-S05776457782007033000000) )
9. REMOVE OIL COOLER PIPE (SEE «REPLACEMENT»(ref-228781-S24530714052006041100000) )
10. REMOVE IGNITION COIL ASSY
11. REMOVE TIMING BELT COVER SUB-ASSY NO. 3 LH (SEE «REPLACEMENT»(ref-228781-S24530714052006041100000) )
12. REMOVE TIMING CHAIN OR BELT COVER NO. 2 (SEE «REPLACEMENT»(ref-228781-S24530714052006041100000) )
13. REMOVE CYLINDER HEAD COVER SUB-ASSY Remove the 9 bolts, 9 seal washers and cylinder head cover.
14. REMOVE CYLINDER HEAD COVER SUB-ASSY LH Disconnect the PCV hose. Remove the 9 bolts, 9 seal washers and cylinder head cover.
15. SET NO. 1 CYLINDER TO TDC/COMPRESSION Turn the crankshaft pulley to align its notch with timing mark "0" of the No. 1 timing belt cover. Check that the timing marks of the camshaft timing pulleys and timing belt rear plates are aligned. If not, turn the crankshaft 1 complete revolution (360°) and align the marks as above.
16. INSPECT VALVE CLEARANCE Check only the valves indicated. Using a feeler gauge, measure the clearance between the valve lifter and camshaft. Record the out-of-specification valve clearance measurements. They will be used later to determine the required replacement adjusting shim. Valve clearance (Cold): Intake: 0.15 to 0.25 mm (0.006 to 0.010 in.) Exhaust: 0.25 to 0.35 mm (0.010 to 0.014 in.) Turn the crankshaft 1 complete revolution (360°) and align the camshaft timing marks. Check only the valves indicated (Scheme 17) Measure the valve clearance.
17. ADJUST VALVE CLEARANCE Remove the timing belt (See «REPLACEMENT»(ref-228781-S24530714052006041100000) ). Remove the camshafts (RH Bank) (See «REPLACEMENT»(ref-228781-S16961024762006041100000) ). Remove the camshafts (LH Bank) (See «REPLACEMENT»(ref-228781-S03093871302006041100000) ). Remove the valve lifter and adjusting shim. NOTE: Be careful not to drop the adjusting shim into the cylinder head. Determine the replacement adjusting shim size according to the formula or tables on (Scheme 19) and (Scheme 20). Using a micrometer, measure the thickness of the removed shim. Calculate the thickness of a new shim so that the valve clearance comes within the specified value. T: Thickness of removed shim A: Measured valve clearance N: Thickness of new shim Intake: N = T + (A - 0.20 mm (0.008 in.)) Exhaust: N = T + (A - 0.30 mm (0.012 in.)) Select a new shim with a thickness as close as possible to the calculated value. HINT: Shims are available in 41 increments of 0.020 mm (0.0008 in.), from 2.00 mm (0.0787 in.) to 2.80 mm (0.1102 in.). Place a new adjusting shim on the valve. Place the valve lifter. Reinstall the camshafts (LH Bank) (See «REPLACEMENT»(ref-228781-S03093871302006041100000) ). Reinstall the camshafts (RH Bank) (See «REPLACEMENT»(ref-228781-S16961024762006041100000) ). Reinstall the timing belt (See «REPLACEMENT»(ref-228781-S24530714052006041100000) ). Recheck the valve clearance.
18. INSTALL CYLINDER HEAD COVER SUB-ASSY LH (SEE «OVERHAUL»(ref-228781-S00006815852006041100000) )
19. INSTALL CYLINDER HEAD COVER SUB-ASSY (SEE «OVERHAUL»(ref-228781-S00006815852006041100000) )
20. INSTALL TIMING CHAIN OR BELT COVER NO. 2 (SEE «REPLACEMENT»(ref-228781-S24530714052006041100000) )
21. INSTALL TIMING BELT COVER SUB-ASSY NO. 3 LH (SEE «REPLACEMENT»(ref-228781-S24530714052006041100000) )
22. INSTALL IGNITION COIL ASSY
23. INSTALL OIL COOLER PIPE (SEE «REPLACEMENT»(ref-228781-S24530714052006041100000) )
24. INSTALL FAN AND GENERATOR V BELT (SEE «FAN AND GENERATOR V BELT (2UZ-FE)»(ref-228781-S05776457782007033000000) )
25. INSTALL RADIATOR SUPPORT SEAL UPPER
26. INSTALL AIR CLEANER HOSE ASSY
27. INSTALL ENGINE ROOM SIDE COVER LH
28. INSTALL ENGINE ROOM COVER SIDE
29. INSTALL V-BANK COVER SUB-ASSY
30. ADD ENGINE COOLANT (SEE «COOLANT (2UZ-FE)»(/lexus/gx/j120-2002-2009/remont/cooling-system-mechanical/#cooling) )

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1. PREVENT GASOLINE FROM SPILLING OUT (SEE «FUEL SYSTEM (2UZ-FE)»(/lexus/gx/j120-2002-2009/remont/fuel-system/#fuel) )
2. REMOVE AUTOMATIC TRANSMISSION ASSY (SEE «REPLACEMENT»(ref-228796-S02432940402006041100000) )
3. REMOVE HOOD SUB-ASSY Disconnect the windshield washer hose. Disconnect the hood dampers. Remove the 4 bolts and hood sub-assy.
4. REMOVE V-BANK COVER SUB-ASSY Remove the 2 nuts and V-bank cover sub-assy.
5. REMOVE ENGINE ROOM COVER SIDE
6. REMOVE ENGINE ROOM SIDE COVER LH
7. REMOVE AIR CLEANER HOSE ASSY Disconnect the vacuum hoses (for P/S idle up and for fuel pressure regulator) and ventilation hose.
8. REMOVE AIR CLEANER ASSY Disconnect the intake air flow meter connector. Disconnect the ground cable from the body. Remove the air cleaner cap and air cleaner element. Remove the 3 bolts and air cleaner assy.
9. REMOVE ENGINE UNDER COVER SUB-ASSY NO. 1
10. REMOVE ENGINE UNDER COVER ASSY REAR
11. DRAIN ENGINE COOLANT (SEE «COOLANT (2UZ-FE)»(/lexus/gx/j120-2002-2009/remont/cooling-system-mechanical/#cooling) )
12. DRAIN ENGINE OIL Remove the oil pan drain plug and drain the engine oil. Clean the oil pan drain plug and install a new gasket and the drain plug. Torque: 39 N.m (398 kgf.cm, 29 ft.lbf)
13. REMOVE RADIATOR ASSY (SEE «RADIATOR ASSY (2UZ-FE)»(/lexus/gx/j120-2002-2009/remont/cooling-system-mechanical/#cooling) )
14. REMOVE FAN SHROUD Disconnect the fasteners of the clamp and oil cooler hoses from the fan shroud in sequence. Remove the fan shroud with fan.
15. DISCONNECT FUEL HOSE NO. 2 Observe the following precautions when disconnecting the fuel tube connector: Remove the fuel pipe clamp No. 2. Check if there is any dirt on the pipe and around the connector before disconnecting them. Clean the dirt away if necessary. Disconnect the connector from the hose while pinching part A with fingers. When the connector and the pipe are stuck, pinch the fuel pipe with fingers and push the fuel tube connector to the fuel pipe by pressing the release buttons, then pull the connector out from the pipe. Do not use any tool at this time. Check if there is any dirt or other foreign objects on the seal surface of the disconnected pipe and clean it away. Do not damage the disconnected pipe and connector, and prevent intrusion of foreign objects by covering them with a plastic bag.
16. DISCONNECT FUEL HOSE Observe the following precautions when disconnecting the fuel tube connector: Remove the fuel pipe clamp No. 1. Check if there is any dirt on the pipe and around the connector before disconnecting them. Clean the dirt away if necessary. Disconnect the connector from the hose while pinching part A with fingers. When the connector and the pipe are stuck, pinch the fuel pipe with fingers and push the fuel tube connector to the fuel pipe by pressing the release buttons, then pull the connector out from the pipe. Do not use any tool at this time. Check if there is any dirt or other foreign objects on the seal surface of the disconnected pipe and clean it away. Do not damage the disconnected pipe and connector, and prevent intrusion of foreign objects by covering them with a plastic bag.
17. DISCONNECT FUEL VAPOR FEED HOSE ASSY
18. REMOVE FAN AND GENERATOR V BELT (SEE «FAN AND GENERATOR V BELT (2UZ-FE)»(ref-228781-S05776457782007033000000) )
19. SEPARATE VANE PUMP ASSY Disconnect the vacuum hose. Remove the nut, 2 bolts and vane pump assy. HINT: Hang up the hose instead of detaching.
20. SEPARATE COMPRESSOR Disconnect the compressor connector. Remove the nut, 3 bolts, compressor stay and compressor. HINT: Hang up the hoses instead of detaching.
21. REMOVE FAN W/ FLUID COUPLING Remove the 4 nuts and fan w/ fluid coupling. Remove the fan pulley.
22. REMOVE TRANSMISSION OIL FILLER TUBE SUB-ASSY Remove the bolt and transmission oil filler tube.
23. REMOVE OIL LEVEL GAUGE GUIDE Remove the bolt and oil level gauge guide. Remove the O-ring.
24. DISCONNECT HEATER HOSE
25. SEPARATE ENGINE WIRE Remove the front door scuff plate RH. (See «REPLACEMENT»(ref-228807-S32953263012006041100000) ) Remove the cowl side trim board RH. (See «REPLACEMENT»(ref-228807-S32953263012006041100000) ) Remove the glove compartment door. (See «REPLACEMENT»(ref-228807-S32953263012006041100000) ) Disconnect each connector for the ECM, four-wheel-drive-control ECU and instrument panel wire before pull out the engine wire into the engine room. Disconnect the 3 ground cables from the body. Disconnect the engine wire No. 2 from the battery terminals (positive and negative) and engine room relay block.
26. REMOVE ENGINE ASSY Attach the engine chain hoist to the engine hangers. Remove the 4 nuts and 4 bolts. Lift the engine out of the vehicle slowly and carefully. HINT: Make sure the engine is kept clear of all wiring hoses and cables.
27. REMOVE ENGINE WIRE Disconnect the VSV connector. Disconnect the solenoid connector.
28. REMOVE INTAKE MANIFOLD ASSY (SEE «REPLACEMENT»(/lexus/gx/j120-2002-2009/remont/removal-installation/#engine-control-system) )
29. REMOVE WIRING HARNESS HEAT INSULATOR NO. 2 Remove the 2 bolts and wiring harness heat insulator No. 2.
30. REMOVE ENGINE WIRE NO. 2 Remove the bolt and separate the ground cable wire. Remove the nut, 2 bolts and engine wire No. 2.
31. REMOVE ENGINE MOUNTING BRACKET FRONT NO. 1 RH Remove the 4 bolts and the engine-mounting bracket together with the engine-mounting insulator front.
32. REMOVE ENGINE MOUNTING BRACKET FRONT NO. 1 LH Remove the 4 bolts and the engine-mounting bracket together with the engine-mounting insulator front.
33. REMOVE GENERATOR ASSY (SEE «REPLACEMENT»(/lexus/gx/j120-2002-2009/remont/charging-system/#starting-charging) )
34. REMOVE HEATER HOSE
35. REMOVE DRIVE PLATE & RING GEAR SUB-ASSY (SEE «ENGINE REAR OIL SEAL (2UZ-FE)»(ref-228781-S03584277372006041100000) )
36. REMOVE OIL COOLER PIPE Disconnect the 3 hoses. Remove the bolt, nut and oil cooler pipe.
37. REMOVE PUMP BRACKET Remove the 4 bolts and pump bracket.
38. REMOVE TIMING BELT COVER SUB-ASSY NO. 3 LH Remove the grommet and separate the cam position sensor connector from the timing belt cover sub-assy No. 3 LH. Remove the 4 bolts and timing belt cover sub-assy No. 3 LH.
39. REMOVE TIMING CHAIN OR BELT COVER NO. 2 Remove the nut, 3 bolts and timing belt cover No. 2.
40. REMOVE TIMING BELT COVER SUB-ASSY NO. 2 Remove the 2 bolts and timing belt cover sub-assy No. 2.
41. REMOVE V-RIBBED BELT TENSIONER ASSY Remove the bolt, 2 nuts and V-ribbed belt tensioner.
42. REMOVE FAN BRACKET SUB-ASSY Remove the 2 nuts, 2 bolts and fan bracket sub-assy.
43. REMOVE IGNITION COIL ASSY Remove the 8 bolts and 8 ignition coils.
44. REMOVE CAMSHAFT POSITION SENSOR Remove the bolt, stud bolt and camshaft position sensor.
45. REMOVE CRANKSHAFT POSITION SENSOR Remove the bolt and crankshaft position sensor.
46. REMOVE VVT SENSOR Remove the 2 bolts and VVT sensors.
47. REMOVE WATER BY-PASS PIPE SUB-ASSY Remove the wire clamp. Remove the bolt and water by-pass. Remove the O-ring from the water by-pass pipe sub-assy.
48. REMOVE AIR SWITCHING VALVE NO. 2 (SEE «REPLACEMENT»(/lexus/gx/j120-2002-2009/remont/auxiliary-emission-control-systems/#emission-control) )
49. REMOVE WATER BY-PASS JOINT RR Remove the 4 nuts and water by-pass joint. Remove the 2 gaskets from the water by-pass joint.
50. REMOVE AIR PUMP ASSY W/ BRACKET (SEE «REPLACEMENT»(/lexus/gx/j120-2002-2009/remont/auxiliary-emission-control-systems/#emission-control) )
51. REMOVE STARTER ASSY Disconnect the engine wire No. 2. Remove the 2 bolts and starter assy.
52. REMOVE KNOCK SENSOR (SEE «REPLACEMENT»(/lexus/gx/j120-2002-2009/remont/removal-installation/#engine-control-system) ) SST 09816-30010
53. REMOVE WATER INLET HOUSING (SEE «WATER PUMP ASSY (2UZ-FE)»(/lexus/gx/j120-2002-2009/remont/cooling-system-mechanical/#cooling) )
54. REMOVE WATER BY-PASS JOINT FR Remove the 4 nuts, water by-pass joint and 2 gaskets.
55. REMOVE EXHAUST MANIFOLD SUB-ASSY RH Remove the 4 bolts and exhaust manifold heat insulator No. 1. Disconnect the oxygen sensor connector. Remove the 8 nuts and exhaust manifold sub-assy.
56. REMOVE EXHAUST MANIFOLD SUB-ASSY LH Remove the 4 bolts and exhaust manifold heat insulator No. 2. Disconnect the oxygen sensor connector. Remove the 8 nuts and exhaust manifold sub-assy.
57. REMOVE OIL COOLER ASSY Remove the 2 bolts and nut. Remove the oil cooler assy w/ bracket and gasket.
58. REMOVE VENTILATION VALVE SUB-ASSY Remove the ventilation valve cover. Remove the ventilation valve sub-assy.
59. REPLACE PARTIAL ENGINE ASSY
60. INSTALL VENTILATION VALVE SUB-ASSY Apply adhesive to 2 or 3 threads. Adhesive: Part No. 08833-00070, THREE BOND 1324 or equivalent Install the ventilation valve. Torque: 27 N.m (275 kgf.cm, 20 ft.lbf) HINT: After tightening the valve to the specified torque, turn the ventilation valve clockwise with the port facing in the direction indicated in (Scheme 54). Install the ventilation valve cover to the ventilation valve. Connect the ventilation hose to the ventilation valve.
61. INSTALL OIL COOLER ASSY Place a new gasket into the groove of the oil cooler. Apply a light coat of engine oil to the gasket. Install the oil cooler assy with the 2 bolts and nut. Torque: 18 N.m (185 kgf.cm. 13 ft.lbf)
62. INSTALL EXHAUST MANIFOLD SUB-ASSY LH Place a new gasket on the cylinder head. NOTE: Be careful of the installation direction. Install the exhaust manifold with 8 new nuts. Uniformly tighten the nuts in diagonally. Torque: 44 N.m (450 kgf.cm, 33 ft.lbf) Install the heat insulator with the 4 bolts. Torque: 7.5 N.m (76 kgf.cm, 66 in.lbf)
63. INSTALL EXHAUST MANIFOLD SUB-ASSY RH Place a new gasket on the cylinder head. NOTE: Be careful of the installation direction. Install the exhaust manifold with 8 new nuts. Uniformly tighten the nuts diagonally. Torque: 44 N.m (450 kgf.cm, 33 ft.lbf) Install the heat insulator with the 4 bolts. Torque: 7.5 N.m (76 kgf.cm, 66 in.lbf)
64. INSTALL WATER BY-PASS JOINT FR With the flat-bottom of each new gasket facing downward (Scheme 57), install the 2 gaskets to the engine front side. Install the water by-pass joint with the 4 nuts. Alternately tighten the nuts. Torque: 18 N.m (185 kgf.cm, 13 ft.lbf)
65. INSTALL WATER INLET HOUSING (SEE «WATER PUMP ASSY (2UZ-FE)»(/lexus/gx/j120-2002-2009/remont/cooling-system-mechanical/#cooling) )
66. INSTALL KNOCK SENSOR (SEE «REPLACEMENT»(/lexus/gx/j120-2002-2009/remont/removal-installation/#engine-control-system) ) SST 09816-30010
67. INSTALL STARTER ASSY Install the starter assy with the 2 bolts. Torque: 39 N.m (400 kgf.cm, 29 ft.lbf) Connect the engine wire No. 2. Torque: 9.8 N.m (100 kgf.cm, 7.2 ft.lbf)
68. INSTALL AIR PUMP ASSY W/ BRACKET (SEE «REPLACEMENT»(/lexus/gx/j120-2002-2009/remont/auxiliary-emission-control-systems/#emission-control) )
69. INSTALL WATER BY-PASS JOINT RR With the flat-bottom of each new gasket facing downward (Scheme 58), install the 2 gaskets to the engine rear side. Install the water by-pass joint with the 4 nuts. Alternately tighten the nuts. Torque: 18 N.m (185 kgf.cm, 13 ft.lbf)
70. INSTALL AIR SWITCHING VALVE NO. 2 (SEE «REPLACEMENT»(/lexus/gx/j120-2002-2009/remont/auxiliary-emission-control-systems/#emission-control) )
71. INSTALL WATER BY-PASS PIPE SUB-ASSY Install a new O-ring to the water by-pass pipe. Apply soapy water to the O-ring. Push in the water by-pass pipe end into the pipe hole of the water pump. Install the water by-pass pipe with the bolt. Torque: 18 N.m (185 kgf.cm, 13 ft.lbf)
72. INSTALL VVT SENSOR Install the VVT sensors with the 2 bolts. Torque: 7.5 N.m (80 kgf.cm, 66 in.lbf)
73. INSTALL CRANKSHAFT POSITION SENSOR Install the crankshaft position sensor with the bolt. Torque: 6.5 N.m (65 kgf.cm, 58 in.lbf)
74. INSTALL CAMSHAFT POSITION SENSOR Install the camshaft position sensor with the bolt and the stud bolt. Torque: 7.5 N.m (80 kgf.cm, 66 in.lbf)
75. INSTALL IGNITION COIL ASSY Install the 8 ignition coils with the 8 bolts. Torque: 7.5 N.m (80 kgf.cm, 66 in.lbf)
76. INSTALL FAN BRACKET SUB-ASSY Install the fan bracket with the 2 bolts and 2 nuts. Torque: 12 mm head: 16 N.m (160 kgf.cm, 12 ft.lbf) 14 mm head: 32 N.m (326 kgf.cm, 24 ft.lbf)
77. INSTALL V-RIBBED BELT TENSIONER ASSY Install the v-ribbed belt tensioner with the bolt and 2 nuts. Torque: 16 N.m (160 kgf.cm, 12 ft.lbf)
78. INSTALL TIMING BELT COVER SUB-ASSY NO. 2 Install the timing belt cover sub-assy No. 2 with the 2 bolts. Torque: 16 N.m (160 kgf.cm, 12 ft.lbf)
79. INSTALL TIMING CHAIN OR BELT COVER NO. 2 Install the timing chain or belt cover with the nut and 3 bolts. Torque: 7.5 N.m (80 kgf.cm, 66 in.lbf)
80. INSTALL TIMING BELT COVER SUB-ASSY NO. 3 LH Install the timing belt cover sub-assy with the 4 bolts. Torque: 7.5 N.m (80 kgf.cm, 66 in.lbf) Install the camshaft position sensor connector and grommet to the timing belt cover.
81. INSTALL PUMP BRACKET Install the pump bracket with the 4 bolts. Torque: 43 N.m (438 kgf.cm, 32 ft.lbf)
82. INSTALL OIL COOLER PIPE Install the oil cooler pipe with the bolt and nut. Torque: 7.5 N.m (80 kgf.cm, 66 in.lbf) Connect the 3 hoses.
83. INSTALL DRIVE PLATE & RING GEAR SUB-ASSY (SEE «ENGINE REAR OIL SEAL (2UZ-FE)»(ref-228781-S03584277372006041100000) )
84. INSTALL HEATER HOSE
85. INSTALL GENERATOR ASSY (SEE «REPLACEMENT»(/lexus/gx/j120-2002-2009/remont/charging-system/#starting-charging) )
86. INSTALL ENGINE MOUNTING BRACKET FRONT NO. 1 LH Install the engine-mounting bracket and engine-mounting insulator with the 4 bolts. Torque: 36 N.m (367 kgf.cm, 27 ft.lbf)
87. INSTALL ENGINE MOUNTING BRACKET FRONT NO. 1 RH Install the engine-mounting bracket and engine-mounting insulator with the 4 bolts. Torque: 36 N.m (367 kgf.cm, 27 ft.lbf)
88. INSTALL ENGINE WIRE NO. 2 Install the engine wire protector with the nut and 2 bolts. Connect the ground cable wire clamp with the bolt.
89. INSTALL WIRING HARNESS HEAT INSULATOR NO. 2 Install the wiring harness heat insulator with the 2 bolts. Torque: 17 N.m (175 kgf.cm, 13 ft.lbf)
90. INSTALL INTAKE MANIFOLD ASSY (SEE «REPLACEMENT»(/lexus/gx/j120-2002-2009/remont/removal-installation/#engine-control-system) )
91. INSTALL ENGINE WIRE
92. INSTALL ENGINE ASSY Attach the engine chain hoist to the engine hangers. Slowly lower the engine assembly into the engine compartment. Attach the engine mounting brackets to the frame brackets. Install the engine mounting brackets with the 4 nuts and 4 bolts. Torque: 38 N.m (387 kgf.cm, 28 ft.lbf) Remove the engine chain hoist.
93. INSTALL ENGINE WIRE
94. CONNECT HEATER HOSE
95. INSTALL OIL LEVEL GAUGE GUIDE Install a new O-ring to the oil level gauge guide. Install the oil level gauge guide with the bolt. Torque: 15 N.m (155 kgf.cm, 11 ft.lbf)
96. INSTALL TRANSMISSION OIL FILLER TUBE SUB-ASSY Install a new O-ring to the oil filler tube sub-assy. Install the transmission oil filler tube sub-assy with the bolt. Torque: 12 N.m (122 kgf.cm, 9 ft.lbf)
97. INSTALL FAN W/ FLUID COUPLING Install the fan pulley to the engine. Install the fan w/ fluid coupling with the 4 nuts. Torque: 29 N.m (296 kgf.cm, 21 ft.lbf)
98. INSTALL COMPRESSOR Install the compressor with the stay, nut and 3 bolts. Torque: Bolt: 47 N.m (475 kgf.cm, 34 ft.lbf) Nut: 25 N.m (255 kgf.cm, 18 ft.lbf) Connect the compressor connector.
99. INSTALL VANE PUMP ASSY Install the vane pump assy with the nut and 2 bolts. Torque: 43 N.m (438 kgf.cm, 32 ft.lbf)
100. INSTALL FAN AND GENERATOR V BELT (SEE «FAN AND GENERATOR V BELT (2UZ-FE)»(ref-228781-S05776457782007033000000) )
101. CONNECT FUEL VAPOR FEED HOSE ASSY
102. CONNECT FUEL HOSE
103. CONNECT FUEL HOSE NO. 2
104. INSTALL FAN SHROUD Install the fan shroud with the fan into the engine room. Torque: 5.0 N.m (51 kgf.cm, 44 in.lbf)
105. INSTALL RADIATOR ASSY (SEE «RADIATOR ASSY (2UZ-FE)»(/lexus/gx/j120-2002-2009/remont/cooling-system-mechanical/#cooling) )
106. ADD ENGINE COOLANT (SEE «COOLANT (2UZ-FE)»(/lexus/gx/j120-2002-2009/remont/cooling-system-mechanical/#cooling) )
107. ADD ENGINE OIL
108. INSTALL ENGINE UNDER COVER ASSY REAR
109. INSTALL ENGINE UNDER COVER SUB-ASSY NO. 1
110. INSTALL AIR CLEANER ASSY Install the air cleaner assy with the 3 bolts. Torque: 12 N.m (122 kgf.cm, 9 ft.lbf) Connect the wire harness clamp and the ground cable. Torque: 8.3 N.m (85 kgf.cm, 73 in.lbf)
111. INSTALL AIR CLEANER HOSE ASSY
112. INSTALL ENGINE ROOM SIDE COVER LH
113. INSTALL ENGINE ROOM COVER SIDE
114. INSTALL V-BANK COVER SUB-ASSY Install the V-bank cover sub-assy with the 2 nuts. Torque: 7.5 N.m (80 kgf.cm, 66 in.lbf)
115. INSTALL HOOD SUB-ASSY Install the hood with the 4 bolts. Torque: 13 N.m (133 kgf.cm, 10 ft.lbf) Connect the hood damper. Torque: 18 N.m (180 kgf.cm, 13 ft.lbf) Connect the windshield washer hose.
116. INSTALL AUTOMATIC TRANSMISSION ASSY (SEE «REPLACEMENT»(ref-228796-S02432940402006041100000) )
117. CHECK FOR ENGINE COOLANT LEAKS (SEE «COOLING SYSTEM (2UZ-FE)»(/lexus/gx/j120-2002-2009/remont/cooling-system-mechanical/#cooling) )
118. CHECK FOR EXHAUST GAS LEAKS
119. INSPECT CHECK FOR FUEL LEAKS (SEE «ON-VEHICLE INSPECTION»(/lexus/gx/j120-2002-2009/remont/fuel-system/#fuel) )
120. INSPECT AUTOMATIC TRANSMISSION FLUID (SEE «AUTOMATIC TRANSMISSION FLUID»(ref-228796-S36285364672006041100000) )
121. INSPECT CHECK FOR ENGINE OIL LEAKS

See also:
• COOLING SYSTEM (2UZ-FE)
• ON-VEHICLE INSPECTION
• DTC P0136, P0137, P0138, P0156, P0157, P0158, OXYGEN SENSOR CIRCUIT MALFUNCTION/LOW VOLTAGE/HIGH VOLTAGE (BANK 1 SENSOR 2)/(BANK 2 SENSOR 2)
• FUEL SYSTEM (2UZ-FE)
• REPLACEMENT
• REPLACEMENT