Engine Assembly Installation

Install 2 No. 1 engine hangers with 2 bolts as shown in the illustration.

Torque:

42 N*m{428 kgf*cm, 31 ft.*lbf}

HINT:

Attach an engine sling device and hang the engine assembly with a chain block.

NOTICE:

Pay attention to the angle of the sling device as the engine assembly or No. 1 engine hanger may be damaged or deformed if the angle is incorrect.

Lift the engine assembly and remove it from the engine stand.

Slowly lower the engine assembly into the engine compartment.

Install the engine assembly with the 4 bolts and 4 nuts.

Torque:

40 N*m{408 kgf*cm, 30 ft.*lbf}

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

Install the rear end plate with the 2 bolts.

Torque:

for bolt A:

18 N*m{184 kgf*cm, 13 ft.*lbf}

for bolt B:

18 N*m{178 kgf*cm, 13 ft.*lbf}

Attach the flywheel housing dust seal.

Using SST, hold the crankshaft.

SST

09213-54015(91651-60855)
09330-00021

Clean the bolt holes.

Install the flywheel sub-assembly with 10 new bolts and uniformly tighten the bolts in several steps in the sequence shown in the illustration.

Torque:

27 N*m{270 kgf*cm, 20 ft.*lbf}

Mark the top of the bolts with paint.

Tighten the 10 bolts 90° in the same sequence.

Check that the paint marks are now at a 90° angle to the top.

Insert SST into the clutch disc. Then insert SST (together with the clutch disc) into the flywheel to install the clutch disc.

SST

09301-00110

Text in Illustration

Flywheel Side

NOTICE:

Be sure to install the clutch disc so that it is facing in the correct direction.

Align the matchmarks on the clutch cover and flywheel.

Tighten the 6 bolts uniformly in the order shown in the illustration, starting with the bolt located near the knock pin on the top.

SST

09301-00110

Torque:

19 N*m{194 kgf*cm, 14 ft.*lbf}

HINT:

Move SST up and down, and right and left lightly after checking that the clutch disc assembly is in the center, and then tighten the bolts.

Using a dial indicator with a roller instrument, measure the diaphragm spring tip alignment.

SST

09333-00013

Maximum non-alignment:

0.5 mm (0.0196 in.)

1. If the alignment is more than the maximum, use SST to adjust the diaphragm spring tip alignment.
   

Using SST, hold the crankshaft.

SST

09213-54015(91651-60855)
09330-00021

Install the front drive plate spacer, drive plate and ring gear sub-assembly and rear drive plate spacer to the crankshaft.

Text in Illustration

*1	Front Drive Plate Spacer
*2	Drive Plate and Ring Gear Sub-assembly
*3	Rear Drive Plate Spacer
	Transmission Side

HINT:

1. The front drive plate spacer is reversible.
   
2. As the rear drive plate spacer and drive plate and ring gear sub-assembly are not reversible, be sure to install it so that it is facing in the direction shown in the illustration.
   

Clean the bolts and bolt holes.

Apply adhesive to 2 or 3 threads at the end of each of the 10 bolts.

Adhesive:

Toyota Genuine Adhesive 1324, Three Bond 1324 or equivalent

Install and uniformly tighten the 10 bolts in several steps in the sequence shown in the illustration.

Torque:

74 N*m{755 kgf*cm, 55 ft.*lbf}

NOTICE:

Do not start the engine for at least an hour after installing the drive plate and ring gear sub-assembly.

Install the rear No. 1 engine mounting insulator.

1. for Manual Transmission (LandCruiser RM0000011B001TX.html)
   
2. for Automatic Transmission (LandCruiser RM000000NR8058X.html)
   

Turn the crankshaft to gain access to the installation locations of the 6 drive plate and torque converter assembly setting bolts and install each bolt while holding the crankshaft pulley bolt with a wrench.

Torque:

48 N*m{489 kgf*cm, 35 ft.*lbf}

NOTICE:

Install the black colored bolt first, and then the 5 silver colored bolts.

Align the matchmarks on the yoke and differential flange.

Install the propeller shaft assembly with the 4 washers, 4 bolts and 4 nuts.

Torque:

88 N*m{899 kgf*cm, 65 ft.*lbf}

Align the matchmarks on the yoke and transfer flange.

Install the propeller shaft assembly with the 4 washers and 4 nuts.

Torque:

88 N*m{899 kgf*cm, 65 ft.*lbf}

Align the matchmarks on the propeller shaft flange and differential flange.

Install the propeller shaft assembly with the 4 washer, 4 bolts and 4 nuts.

Torque:

88 N*m{899 kgf*cm, 65 ft.*lbf}

Align the matchmarks on the propeller shaft flange and transfer flange.

Install the propeller shaft assembly with the 4 washers and 4 nuts.

Torque:

88 N*m{899 kgf*cm, 65 ft.*lbf}

Using a vernier caliper, measure the free length of the compression spring.

Minimum free length:

41.5 mm (1.63 in.)

Using a plastic-faced hammer and wooden block, tap in a new gasket until its surface is flush with the exhaust manifold.

NOTICE:

1. Be sure to install the gasket so that it faces the correct direction.
   
2. Do not reuse the gasket.
   
3. Do not damage the gasket.
   
4. When connecting the front exhaust pipe assembly, do not push in the gasket with the front exhaust pipe assembly.
   

Connect the front exhaust pipe assembly to the exhaust pipe support.

Install the front exhaust pipe assembly to the exhaust manifold with the 2 compression springs and 2 bolts. Alternately tighten the bolts in several passes.

Torque:

43 N*m{438 kgf*cm, 32 ft.*lbf}

Install the bracket to the engine mounting insulator LH with the bolt.

Torque:

13 N*m{131 kgf*cm, 9 ft.*lbf}

Install the ground wire and engine wire with the 2 clamps and bolt.

Torque:

40 N*m{408 kgf*cm, 30 ft.*lbf}

Attach the 2 clamps to connect the wire harness to the engine room No. 1 relay block.

Install the nut.

Torque:

11 N*m{112 kgf*cm, 8 ft.*lbf}

Connect the connector and attach the clamp.

Connect the ECM connector.

1. Attach the grommet to the wire harness support.
   

   Text in Illustration

   *1	Grommet
   *2	Wire Harness Support

2. Pass the wire harness into the vehicle and install the wire harness support.
   





3. Attach the clamp.
   

4. Connect the 9 connectors and attach the clamp.
   

5. Install the glove compartment door (LandCruiser RM0000046J600OX_01_0017.html).
   

Attach the 3 clamps and connect the engine wire to the vehicle RH side.

Install the front No. 1 fender apron to frame seal LH with the 5 clips.

Install the front No. 1 fender apron to frame seal with the 5 clips.

Temporarily install the cooler compressor assembly with the 4 bolts.

Tighten the bolts in the order shown in the illustration to connect the cooler compressor assembly.

Torque:

25 N*m{250 kgf*cm, 18 ft.*lbf}

Connect the connector.

Connect the suction hose with the bolt.

Torque:

7.8 N*m{80 kgf*cm, 69 in.*lbf}

Connect the vane pump assembly with the 2 bolts.

Torque:

21 N*m{214 kgf*cm, 15 ft.*lbf}

Connect the 2 connectors.

Install the pressure feed tube with the bolt.

Torque:

28 N*m{285 kgf*cm, 21 ft.*lbf}

for Single Air Conditioning System:
Connect the 2 heater hoses to the heater core, and slide the 2 clips to secure the hoses.

for Dual Air Conditioning System:
Connect the 2 heater hoses to the water by-pass pipe and hose, and slide the 2 clips to secure the hoses.

Connect the union to check valve hose to the brake booster assembly, and slide the clip to secure the hose.

Connect the purge line hose to the purge VSV, and slide the clip to secure the hose.

Install the No. 2 fuel hose to the fuel pressure regulator and floor pipe, and slide the clip to secure the hose.

HINT:

The direction of each clip is indicated in the illustration.

Attach the clamp.

Install the fuel hose (LandCruiser RM0000028RU05IX.html).

Attach the 2 clamps.

Install the fan pulley to the engine water pump assembly.

Place the shroud together with the coupling fan between the radiator assembly and engine.

NOTICE:

Be careful not to damage the radiator core.

Temporarily install the fluid coupling fan to the engine water pump assembly with the 4 nuts. Tighten the nuts as much as possible by hand.

Attach the claws of the shroud to the radiator assembly as shown in the illustration.

Install the fan shroud with the 2 bolts.

Torque:

5.0 N*m{51 kgf*cm, 44 in.*lbf}

Install the fan and generator V-belt (LandCruiser RM000000YMN02UX.html).

Tighten the 4 nuts of the fluid coupling fan.

Torque:

25 N*m{255 kgf*cm, 18 ft.*lbf}

Attach the claw to close the flexible hose clamp as shown in the illustration.

Install the No. 2 radiator hose so that its paint marks align with the radiator assembly and water inlet protrusion as shown in the illustration and slide the 2 clips to secure the hose.

HINT:

The direction of each clip is indicated in the illustration.

Install the No. 1 radiator hose so that its paint marks align with the radiator assembly and cylinder head protrusions as shown in the illustration and slide the 2 clips to secure the hose.

HINT:

The direction of each clip is indicated in the illustration.

Install the radiator reservoir with the 3 bolts.

Torque:

5.0 N*m{51 kgf*cm, 44 in.*lbf}

Connect the reservoir hose to the radiator assembly.

Install the No. 1 air injection system hose to the air switching valve assembly and air pump assembly, and slide the 2 clips to secure the hose.

Install a new hose clamp.

Install the intake air connector with the 3 bolts.

Torque:

8.0 N*m{82 kgf*cm, 71 in.*lbf}

Tighten the hose clamp.

Torque:

5.0 N*m{51 kgf*cm, 44 in.*lbf}

Connect the vacuum hose.

Connect the No. 2 ventilation hose.

Connect the vacuum hose to the air pressure sensor.

Connect the air pressure sensor connector.

Attach the wire harness and vacuum hose to the intake air connector.

Install the air cleaner case with the 3 bolts.

Torque:

12 N*m{122 kgf*cm, 9 ft.*lbf}

Install the air cleaner filter element sub-assembly.

Install the air cleaner hose and align its matchmark with the matchmark of the intake air connector as shown in the illustration.

Tighten the hose clamp.

NOTICE:

Check that the air cleaner hose is securely installed.

Attach the 4 clamps.

Connect the mass air flow meter connector and attach the 3 clamps.

Install the hood sub-assembly with the 8 bolts.

Torque:

for bolt A:

13 N*m{133 kgf*cm, 10 ft.*lbf}

for bolt B:

18 N*m{184 kgf*cm, 13 ft.*lbf}

Connect the washer nozzle hose.

Adjust the hood position.

1. Loosen the 4 hinge bolts on the hood.
   

2. Move the hood and adjust the clearance between the hood and front fender.
   

3. Tighten the 4 hinge bolts on the hood.
   

   Torque:

   13 N*m{133 kgf*cm, 10 ft.*lbf}

Adjust the height of the front end of the hood using the cushion rubbers.

1. Adjust the 2 cushion rubbers so that the heights of the hood and fender are aligned.
   

   HINT:

   Raise or lower the front end of the hood by turning the 2 cushion rubbers.

Adjust the hood lock.

1. Loosen the 3 bolts.
   

2. Adjust the hood lock and tighten the 3 bolts.
   

   Torque:

   7.5 N*m{76 kgf*cm, 66 in.*lbf}

3. Check that the striker can smoothly engage with the hood lock.
   

Fill the transmission with the correct amount of fluid as listed in the table below.

Standard Capacity:

Performed Repair	Engine Type	Fill Amount
Automatic transmission fluid drain and refill	2TR-FE	1.5 liters (1.6 US qts, 1.3 Imp. qts)
	1GD-FTV, 1GR-FE	3.1 liters (3.3 US qts, 2.7 Imp. qts)
Removal and installation of the automatic transmission oil pan sub-assembly	2TR-FE	0.8 liters (0.8 US qts, 0.7 Imp. qts)
	1GD-FTV, 1GR-FE	2.4 liters (2.5 US qts, 2.1 Imp. qts)
Removal and installation of the transmission valve body assembly	2TR-FE	1.6 liters (1.7 US qts, 1.4 Imp. qts)
	1GD-FTV, 1GR-FE	3.1 liters (3.3 US qts, 2.7 Imp. qts)
Removal and installation of the torque converter assembly (Including the oil drain)	2TR-FE	2.4 liters (2.5 US qts, 2.1 Imp. qts)
	1GD-FTV, 1GR-FE	4.2 liters (4.4 US qts, 3.7 Imp. qts)

HINT:

If the specified amount of automatic transmission fluid cannot be added, perform the following:

1. Temporarily install the O-ring and refill plug to the automatic transmission assembly.
   

   HINT:

   Reuse the old O-ring as the refill plug will be removed again.

2. Lower the vehicle.
   

3. Start the engine.
   

   NOTICE:

   To reduce load, make sure that all electrical systems, such as the air conditioning, lighting system, electric fan and audio system, are off.

4. Slowly move the shift lever from P to S, then move the shift lever to P.
   

5. Allow the engine to idle for 30 seconds to warm it up.
   

6. Turn the ignition switch off.
   

7. Remove the refill plug and O-ring from the automatic transmission assembly.
   

8. Fill the automatic transmission assembly with the correct amount of automatic transmission fluid as listed in the table above.
   

9. Temporarily install the O-ring and refill plug to the automatic transmission assembly.
   

   HINT:

   Reuse the old O-ring as the refill plug will be removed again.

Clean and install the oil pan drain plug and a new gasket.

Torque:

38 N*m{382 kgf*cm, 28 ft.*lbf}

Add fresh engine oil.

Standard Oil Grade:

Oil Grade	Oil Viscosity (SAE)
API grade SL "energy-conserving", SM "energy-conserving", SN "resource-conserving" or ILSAC multigrade engine oil	0W-20 5W-20 5W-30 10W-30
API grade SL, SM or SN multigrade engine oil	15W-40 20W-50*

NOTICE:

*: This grade of engine oil cannot be used for Euro IV or higher.

Standard Capacity:

Item	Specified Condition
Drain and refill without oil filter sub-assembly change	5.5 liters (5.8 US qts, 4.8 Imp. qts)
Drain and refill with oil filter sub-assembly change	5.9 liters (6.2 US qts, 5.2 Imp. qts)
Dry fill	6.4 liters (6.8 US qts, 5.6 Imp. qts)

Install the oil filler cap.

Tighten the cylinder block drain cock plug.

Torque:

13 N*m{130 kgf*cm, 9 ft.*lbf}

Tighten the radiator drain cock plug by hand.

Disconnect the 2 vinyl hoses.

Add engine coolant.

Standard Capacity:

Item		Specified Condition
for Automatic Transmission	w/o Rear Heater	8.1 liters (8.6 US qts, 7.1 Imp. qts)
	w/ Rear Heater	9.9 liters (10.5 US qts, 8.7 Imp. qts)
for Manual Transmission	w/o Rear Heater	8.3 liters (8.8 US qts, 7.3 Imp. qts)
	w/ Rear Heater	10.1 liters (10.7 US qts, 8.9 Imp. qts)

NOTICE:

Do not substitute plain water for engine coolant.

HINT:

1. TOYOTA vehicles are filled with TOYOTA SLLC at the factory. In order to avoid damage to the engine cooling system and other technical problems, only use TOYOTA SLLC or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, non-borate coolant with long-life hybrid organic acid technology (coolant with long-life hybrid organic acid technology consists of a combination of low phosphates and organic acids).
   
2. Press the No. 1 and No. 2 radiator hoses several times by hand, and then check the coolant level. If the coolant level is low, add coolant.
   

Slowly pour coolant into the radiator reservoir until it reaches the F line.

Install the reservoir cap.

Install the radiator cap sub-assembly.*1

Start the engine and stop it immediately.*2

Allow approximately 10 seconds to pass. Then remove the radiator cap sub-assembly and check the coolant level. If the coolant level has decreased, add coolant.*3

Repeat steps *1, *2 and *3 until the coolant level does not decrease.

HINT:

Be sure to perform this step while the engine is cold, as air in the No. 1 radiator hose will flow into the radiator if the engine is warmed up and the thermostat opens.

Install the radiator cap sub-assembly.*4

Set the air conditioning as follows.*5

Start the engine, warm it up until the thermostat opens, and then continue to run the engine for several minutes to circulate the coolant.*6

CAUTION:

1. Wear protective gloves. Hot areas on the parts may injure your hands.
   
2. Be careful of the fan.
   
3. Be careful as the engine, radiator and radiator hoses are hot and can cause burns.
   

NOTICE:

1. Immediately after starting the engine, if the radiator reservoir does not have any coolant, perform the following: 1) stop the engine, 2) wait until the coolant has cooled down, and 3) add coolant until the coolant is filled to the F line.
   
2. Do not start the engine when there is no coolant in the radiator reservoir.
   
3. Pay attention to the needle of the engine coolant temperature receiver gauge. Make sure that the needle does not show an abnormally high temperature.
   
4. If there is not enough coolant, the engine may burn out or overheat.
   

HINT:

1. Press the No. 1 and No. 2 radiator hoses several times by hand to bleed air while warming up the engine.
   
2. The thermostat opening timing can be confirmed by pressing the No. 2 radiator hose by hand and checking when the engine coolant starts to flow inside the hose.
   

Stop the engine, wait until the engine coolant cools down to ambient temperature. Then remove the radiator cap sub-assembly and check the coolant level.*7

CAUTION:

Do not remove the radiator cap sub-assembly while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

If the coolant level has decreased, add coolant and warm up the engine until the thermostat opens.*8

If the coolant level has not decreased, check that the coolant level in the radiator reservoir is at the F line.
If the coolant level is below the F line, repeat steps *4 through *8.
If the coolant level is above the F line, drain coolant until the coolant level reaches the F line.

When moving the shift lever from P to R with the ignition switch to ON and the brake pedal depressed, make sure that the shift lever moves smoothly and correctly to P.

Make sure that the shifting lever moves smoothly and can be moderately operated.

When starting the engine, make sure that the vehicle moves forward when shifting from N to D and moves rearward when shifting to R.

Start the engine. Make sure that there are no oil leaks from the areas that were worked on.

Warm up the engine, stop the engine and wait 5 minutes.

Check that the oil level is between the dipstick low level mark and full level mark.
If the level is low, check for leakage and add oil up to the full level mark.

NOTICE:

Do not fill engine oil above the full level mark.

Fill the radiator assembly with coolant and attach a radiator cap tester.

Warm up the engine.

Using the radiator cap tester, increase the pressure inside the radiator assembly to 123 kPa (1.3 kgf/cm², 18 psi), and then check that the pressure does not drop.
If the pressure drops, check the hose, radiator assembly and engine water pump assembly for leakage. If no external leakage is found, check the heater core, cylinder block and cylinder head.

Make sure that there are no fuel leaks after performing maintenance on the fuel system.

1. Connect the GTS to the DLC3.
   

2. Turn the ignition switch to ON and turn the GTS on.
   

   NOTICE:

   Do not start the engine.

3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.
   

4. Check that there are no leaks from the fuel system.
   If there are fuel leaks, repair or replace parts as necessary.
   

5. Turn the ignition switch off.
   

6. Disconnect the GTS from the DLC3.
   

Warm up and stop the engine.

When using the GTS:

1. Connect the GTS to the DLC3.
   

2. Start the engine and idle it.
   

3. Turn the GTS on.
   

4. Enter the following menus: Powertrain / Engine and ECT / Data List / IGN Advance.
   

   Standard ignition timing:

   5 to 15° BTDC @ idle
   

   HINT:

   Refer to the GTS operator's manual for further details.

   NOTICE:

   1. When checking the ignition timing, the transmission should be in N or P.
      
   2. Switch off all the accessories and the A/C before connecting the GTS.
      

5. Check that the ignition timing advances immediately when the engine speed is increased.
   

6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Connect the TC and TE1.
   

7. Monitor IGN Advance.
   

8. Perform the Active Test.
   

   Standard ignition timing:

   3 to 7° BTDC @ idle
   

   NOTICE:

   When checking the ignition timing, the transmission should be in N or P.

   HINT:

   Refer to the GTS operator's manual for further details.

When not using the GTS:

1. Loosen the hose clamp from the throttle body side.
   

2. Remove the 3 bolts and disconnect the intake air connector.
   

   HINT:

   Move the intake air connector so that the tester probe of a timing light can be connected to the wire of the ignition coil for the No. 1 cylinder.

3. Connect the tester probe of a timing light to the wire of the ignition coil connector for the No. 1 cylinder.
   

   NOTICE:

   Use a timing light that detects primary signals.

4. Connect the intake air connector.
   

   HINT:

   Return the parts to their original positions so that the engine can be started.

5. Start the engine and idle it.
   





6. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
   

   SST

   09843-18040
   

   Text in Illustration

   *a	Front view of DLC3

   NOTICE:

   1. Confirm the terminal numbers before connecting them. Connecting the wrong terminals can damage the engine.
      
   2. When checking the ignition timing, the shift lever should be in N or P.
      

7. Using the timing light, check the ignition timing.
   

   Standard ignition timing:

   3 to 7° BTDC @ idle
   

   NOTICE:

   1. Turn all the electrical systems and the A/C off.
      
   2. When checking the ignition timing, the shift lever should be in N or P.
      

8. Remove SST from the DLC3.
   

9. Check the ignition timing.
   

   Standard ignition timing:

   5 to 15° BTDC @ idle
   

10. Check that the ignition timing advances immediately when the engine speed is increased.
    

11. Turn the ignition switch off.
    

12. Disconnect the timing light from the engine.
    

13. Connect the intake air connector with the 3 bolts.
    

    Torque:

    8.0 N*m{82 kgf*cm, 71 in.*lbf}

14. Tighten the hose clamp.
    

    Torque:

    5.0 N*m{51 kgf*cm, 44 in.*lbf}

Warm up and stop the engine.

When using the GTS:

1. Connect the GTS to the DLC3.
   

2. Start the engine and idle it.
   

3. Turn the GTS on.
   

4. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.
   

   Standard idle speed:

   600 to 700 rpm
   

   NOTICE:

   1. Turn all the electrical systems and the A/C off.
      
   2. When checking the idling speed, the shift lever should be in N or P.
      

   HINT:

   Refer to the GTS operator's manual for further details.

5. Turn the ignition switch off.
   

6. Disconnect the GTS from the DLC3.
   

When not using the GTS:

1. Using SST, connect a tachometer probe to terminal 9 (TAC) of the DLC3.
   

   SST

   09843-18040
   

   NOTICE:

   1. Confirm the terminal numbers before connecting them. Connecting the wrong terminals can damage the engine.
      
   2. Turn all the electrical systems and the A/C off.
      
   3. When checking the idling speed, the shift lever should be in N or P.
      

2. Check the idle speed.
   

   Standard idle speed:

   600 to 700 rpm
   

3. Disconnect the tachometer probe from the DLC3.
   

If the engine speed is not as specified, update the idle speed control (ISC) learned value using either procedure 1 or procedure 2 below, and then check the engine speed again.

1. Procedure 1:
   After completely warming up the engine, drive the vehicle at 30 km/h (19 mph) for 30 seconds or more and idle the engine for 30 seconds or more. Repeat this pattern 5 times or more.
   
   

   
   
   
   
   

   Text in Illustration

   *a	Engine completely warmed up	*b	Vehicle being driven at 30 km/h (19 mph)
   *c	Idling	*d	1 time





2. Procedure 2:
   After completely warming up the engine, stop the engine and then idle it. Repeat this pattern 5 times or more.
   
   

   
   
   
   
   

   Text in Illustration

   *a	Engine completely warmed up	*b	Engine stopped
   *c	Engine started	*d	Idling
   *e	1 time	-	-

   HINT:

   1. Be sure to idle the engine for 150 seconds or more for each time the pattern is repeated.
      
   2. If the engine speed is not as specified after performing the procedure above, inspect the idle speed control system as it is malfunctioning.
      

Start the engine.

Run the engine at 2500 rpm for approximately 180 seconds.

Insert a CO/HC meter testing probe at least 40 cm (1.31 ft.) into the tailpipe while idling the engine.

Check the CO/HC concentration during idling and when the engine is running at 2500 rpm.

HINT:

When doing the 2 mode (with the engine idling/ running at 2500 rpm) test, the measuring procedures are determined by applicable local regulations.

If the CO/HC concentration does not comply with regulations, troubleshoot in the order given below.

1. Check the air fuel ratio sensor (LandCruiser RM00000175800NX_01_0001.html) and heated oxygen sensor (LandCruiser RM00000175E00UX_01_0001.html).
   

2. Refer to the table below for possible causes, and then inspect the applicable parts and repair them if necessary.
   
   

   CO	HC	Problems	Possible Causes
   Normal	High	Rough idling	Faulty ignition: Incorrect timing Plugs are contaminated or shorted, or gaps are incorrect Incorrect valve clearance (valve lash adjuster assembly) Leakage from intake or exhaust valves Leakage from cylinders
   Low	High	Rough idling (Fluctuating HC reading)	Vacuum leaks: PCV hoses Intake manifold Throttle body with motor assembly Brake booster line Lean mixture causing misfire
   High	High	Rough idling (Black smoke from exhaust)	Restricted air cleaner filter element sub-assembly Plugged PCV valve sub-assembly Faulty SFI system: Faulty fuel pressure regulator assembly Faulty engine coolant temperature sensor Faulty mass air flow meter sub-assembly Faulty ECM Faulty fuel injector assemblies Faulty throttle body with motor assembly

Install the upper radiator support seal with the 13 clips.

Install the rear engine under cover with the 4 bolts.

Torque:

29 N*m{296 kgf*cm, 21 ft.*lbf}

Install the transmission under cover with the 2 bolts.

Torque:

29 N*m{296 kgf*cm, 21 ft.*lbf}

Hook the No. 1 engine under cover sub-assembly to the vehicle body as shown in the illustration.

Install the 4 bolts.

Torque:

29 N*m{296 kgf*cm, 21 ft.*lbf}

Install the front bumper cover lower with the 5 bolts and clip.

Torque:

8.0 N*m{82 kgf*cm, 71 in.*lbf}

The engine coolant should be between the LOW and FULL lines when the engine is cold.
If the engine coolant is below the LOW line, check for leakage and add TOYOTA Super Long Life Coolant (SLLC) or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, non-borate coolant with long-life hybrid organic acid technology to the FULL line.