Lexus NX: Installation

INSTALLATION

PROCEDURE

1. INSTALL NO. 2 EXHAUST MANIFOLD HEAT INSULATOR

(a) Install the No. 2 exhaust manifold heat insulator with the 2 bolts.

Torque:

13.5 N·m {138 kgf·cm, 10 ft·lbf}

2. INSTALL EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY

(a) Install a new exhaust manifold to head gasket to the cylinder head sub-assembly.

(b) Temporarily install the exhaust manifold converter sub-assembly with the 5 nuts.

(c) Temporarily install the manifold stay and No. 2 manifold stay with the 2 bolts and 2 nuts.

(d) Tighten the 5 nuts in the order shown in the illustration. Torque: 35 N·m {357 kgf·cm, 26 ft·lbf}

3. INSTALL MANIFOLD STAY

(a) Tighten the bolt and nut in the order shown in the illustration. Torque: 43 N·m {438 kgf·cm, 32 ft·lbf}

4. INSTALL NO. 2 MANIFOLD STAY

(a) Tighten the bolt and nut in the order shown in the illustration. Torque: 43 N·m {438 kgf·cm, 32 ft·lbf}

5. INSTALL NO. 2 EGR PIPE

(a) Install 2 new gaskets to the No. 2 EGR pipe.

NOTICE:

Make sure the claws of the gasket face the No. 2 EGR pipe.

(b) Install the No. 2 EGR pipe with the 2 bolts and 2 nuts.

Torque:

36 N·m {367 kgf·cm, 27 ft·lbf}

6. INSTALL NO. 1 MANIFOLD CONVERTER INSULATOR

(a) Install the No. 1 manifold converter insulator with the 3 bolts.

Torque:

13.5 N·m {138 kgf·cm, 10 ft·lbf}

7. INSTALL AIR FUEL RATIO SENSOR

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8. CONNECT INVERTER RESERVOIR ASSEMBLY

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9. CONNECT WIRE HARNESS

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10. INSTALL NO. 1 EXHAUST MANIFOLD HEAT INSULATOR

(a) Install the No. 1 exhaust manifold heat insulator with the 4 bolts.

Torque:

12 N·m {122 kgf·cm, 9 ft·lbf}

11. INSTALL FRONT EXHAUST PIPE ASSEMBLY

(a) Using a vernier caliper, measure the free length of the compression spring. Minimum length: 41.5 mm (1.63 in.) If the length is less than the minimum, replace the compression spring.

(b) Using a wire brush, remove any foreign matter from the gasket installation surface.

(c) Using a plastic-faced hammer and wooden block, tap in a new gasket until its surface is flush with the exhaust manifold converter sub-assembly. NOTICE: Be sure to install the gasket so that it faces the correct direction. Do not reuse the gasket. Do not damage the gasket. When connecting the front exhaust pipe assembly, do not push in the gasket with the front exhaust pipe assembly.

*1 Exhaust Manifold Converter Sub-assembly *2 Gasket *a Wooden Block

(d) Install a new gasket to the front exhaust pipe assembly.

(e) Install the front exhaust pipe assembly with the 2 compression springs and 4 bolts. Torque: 43 N·m {438 kgf·cm, 32 ft·lbf} HINT: After installation, check that the space between the flanges of the exhaust manifold converter sub-assembly and front exhaust pipe assembly is consistent front-to-rear and left-to-right.

*1 Exhaust Manifold Converter Sub-assembly *2 Front Exhaust Pipe Assembly *3 Gasket *a Space between flanges: 8.5 mm (0.335 in.)

(f) Connect the heated oxygen sensor connector.

12. INSTALL NO. 1 ENGINE UNDER COVER ASSEMBLY

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13. INSTALL NO. 1 ENGINE COVER SUB-ASSEMBLY

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14. INSPECT FOR EXHAUST GAS LEAK

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