Lexus NX: Installation
INSTALLATION
CAUTION / NOTICE / HINT
HINT:
Perform "Inspection After Repairs" after replacing the cylinder head sub-assembly.
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PROCEDURE
1. INSTALL CYLINDER HEAD GASKET
(a) Clean the cylinder block and cylinder head sub-assembly with solvent.
(b) Apply a seal packing to a new cylinder head gasket as shown in the illustration.
| *1 | Cylinder Block |
| *2 | Cylinder Head Gasket |
| *a | Lot No. |
| *b | 3.0 to 7.0 mm (0.118 to 0.276 in.) |
| *c | 20 mm (0.787 in.) or more |
| *d | 7.0 mm (0.276 in.) |
| *e | 3.0 mm (0.118 in.) or more |
.png) | Seal Packing Application Area |
.png) | Engine Front |
Seal packing:
Toyota Genuine Seal Packing Black, Three Bond 1207B or equivalent
Standard seal dimension:
3.0 to 7.0 mm (0.118 to 0.276 in.) wide and 3.0 mm (0.118 in.) thick
NOTICE:
- Remove any oil from the contact surface.
- Install the cylinder head gasket within 3 minutes and tighten the bolts within 15 minutes after applying seal packing.
HINT:
Apply at least 20 mm (0.787 in.) of seal packing from the inside edge of the protrusion of the cylinder block.
(c) Place a new cylinder head gasket on the cylinder block surface with the front face of the Lot No. stamp upward.
NOTICE:
Pay attention to the installation direction.
2. INSTALL CYLINDER HEAD SUB-ASSEMBLY
HINT:
Perform "Inspection After Repairs" after replacing the cylinder head sub-assembly.
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(a) Place the cylinder head sub-assembly on the cylinder block.
NOTICE:
- Make sure that no oil is on the mounting surface of the cylinder head sub-assembly.
- Place the cylinder head sub-assembly on the cylinder block gently in order not to damage the gasket with the bottom part of the head.
HINT:
The cylinder head set bolts are tightened in 4 progressive steps.
(b) Install the plate washers to the cylinder head set bolts.
(c) Apply a light coat of engine oil to the threads and under the heads of the cylinder head set bolts.
(d) Step 1:
| (1) Using a 10 mm bi-hexagon wrench, install and uniformly tighten the 10 cylinder head set bolts in several steps in the sequence shown in the illustration. Torque: 36 N·m {367 kgf·cm, 27 ft·lbf} NOTICE: Do not drop the plate washers for the cylinder head set bolt into the cylinder head sub-assembly. |
|
(e) Step 2:
(1) Tighten the cylinder head set bolts again in the sequence shown in the illustration to make sure that they are tightened to the specified torque.
Torque:
36 N·m {367 kgf·cm, 27 ft·lbf}
(f) Step 3:
(1) Mark the front side of each cylinder head set bolt head with paint.
(2) Tighten the cylinder head set bolts 90° in the sequence shown in step 1.
(g) Step 4:
(1) Tighten the cylinder head set bolts another 90° in the sequence shown in step 1.
(2) Check that the paint marks are now at a 180° angle to the front.
NOTICE:
- Do not apply oil for at least 4 hours after the installation.
- Do not start the engine for at least 4 hours after the installation.
- After the installation, if the seal packing has seeped out, wipe it off.
3. INSTALL VALVE STEM CAP
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4. INSTALL VALVE LASH ADJUSTER ASSEMBLY
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5. INSTALL NO. 1 VALVE ROCKER ARM SUB-ASSEMBLY
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6. INSTALL NO. 2 CAMSHAFT BEARING
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7. INSTALL NO. 1 CAMSHAFT BEARING
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8. INSTALL NO. 2 CAMSHAFT
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9. INSTALL CAMSHAFT
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10. INSTALL OIL CONTROL VALVE FILTER
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11. INSTALL CAMSHAFT BEARING CAP
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12. INSTALL CAMSHAFT HOUSING SUB-ASSEMBLY
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13. INSTALL CAMSHAFT TIMING GEAR ASSEMBLY
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14. INSTALL CAMSHAFT TIMING SPROCKET
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15. ADD ENGINE OIL
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16. INSTALL NO. 1 CHAIN VIBRATION DAMPER
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17. INSTALL CHAIN SUB-ASSEMBLY
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18. INSTALL CHAIN TENSIONER SLIPPER
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19. INSTALL NO. 1 CHAIN TENSIONER ASSEMBLY
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20. INSTALL TIMING CHAIN GUIDE
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21. CHECK NO. 1 CYLINDER TO TDC/COMPRESSION
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22. INSTALL INJECTOR VIBRATION INSULATOR
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23. INSTALL FUEL DELIVERY PIPE
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24. INSTALL INTAKE MANIFOLD
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25. TEMPORARILY INSTALL NO. 1 EGR PIPE
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26. INSTALL NO. 1 WATER BY-PASS HOSE
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27. INSTALL NO. 3 WATER BY-PASS HOSE
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28. TEMPORARILY INSTALL EGR VALVE ASSEMBLY
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29. TEMPORARILY INSTALL EGR COOLER ASSEMBLY
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30. INSTALL WATER BY-PASS PIPE
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31. TIGHTEN NO. 1 EGR PIPE
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32. TIGHTEN EGR COOLER ASSEMBLY
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33. TIGHTEN EGR VALVE ASSEMBLY
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34. INSTALL THROTTLE WITH MOTOR BODY ASSEMBLY
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35. INSTALL EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY
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36. INSTALL TIMING CHAIN COVER ASSEMBLY
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