Nissan Sentra. Manual — part 449

EX-6

< REMOVAL AND INSTALLATION >

EXHAUST SYSTEM

• Remove heated oxygen sensor 2 (1) using Tool (A).

CAUTION:

• Discard any heated oxygen sensor which has been dropped

from a height of more than 0.5 m (19.7 in) onto a hard sur-

face such as a concrete floor; use a new one.

• Before installing new heated oxygen sensor, clean exhaust

system threads using oxygen sensor thread cleaner and

approved anti-seize lubricant.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• Always replace seal bearings with new ones when reassembling.

• Discard any heated oxygen sensor 2 which has been dropped onto a hard surface such as a con-

crete floor. Use a new one.

• Before installing a new heated oxygen sensor 2, clean exhaust system threads using the oxygen

sensor thread cleaner and apply anti-seize lubricant.

• Do not over tighten heated oxygen sensor 2. Doing so may cause damage to the heated oxygen sen-

sor 2, resulting in the “MIL” coming on.

• Prevent rust preventives from adhering to the sensor body.

• If heat insulator is badly deformed, repair or replace it. If deposits such as mud pile up on the heat

insulator, remove them.

• When installing heat insulator avoid large gaps or interference between heat insulator and each

exhaust pipe.

• Remove deposits from the sealing surface of each connection. Connect them securely to avoid gas

fume leaks.

• When installing each mounting rubber, use silicon oil to avoid twisting.

• Temporarily tighten nuts and bolts. Check each part for unusual interference and mounting rubber

interference, and then tighten them to the specified torque.

• When installing each mounting rubber, avoid twisting or unusual extension in up/down, front/rear

and right/left directions.

Exhaust Manifold to Exhaust Front Tube

1. Securely insert seal bearing (2) into exhaust manifold (1) in the

direction shown.

CAUTION:

Be careful not to damage seal bearing surface when install-

ing.

2. Install spring and tighten nut.

CAUTION:

• Fasten stud bolts to the flange of exhaust manifold side to the specified torque before installing

nuts.

• Ensure springs are seated correctly on the flange and not sitting on protrusion (A).
• Be careful that stud bolt does not interfere with mounting hole of exhaust front tube (

3. After installing, check that stud bolt does not interfere with mounting hole of exhaust front tube.

Exhaust Front Tube to Center Muffler

Tool number

: KV10114400 (J-38365)
: Front

Oxygen sensor thread cleaner

: J-43897-12

Oxygen sensor thread cleaner

: J-43897-18

JPBIA4222ZZ

(3)

: Spring

(4)

: Nut

(5)

: Stud bolt

(6)

: Exhaust front tube

JPBIA2372ZZ

EXHAUST SYSTEM

EX-7

< REMOVAL AND INSTALLATION >

1. Securely insert seal bearing (2) into exhaust front tube (1) in the

direction shown.

CAUTION:

Be careful not to damage seal bearing surface when install-

ing.

2. Install spring and tighten bolt.

CAUTION:

• Ensure springs are seated correctly on the flange and not sitting on protrusion (A).
• Be careful that bolt does not interfere with mounting hole of center muffler (

3. After installing, check that bolt does not interfere with mounting hole of center muffler.

Inspection

INFOID:0000000009756275

INSPECTION AFTER INSTALLATION

• Check clearance between tail tube and rear bumper is even.

• With engine running, check exhaust tube joints for gas fume leaks and unusual noises.

• Check to ensure that mounting brackets and mounting rubbers are installed properly and free from undue

stress. Improper installation could result in excessive noise and vibration.

(3)

: Spring

(4)

: Bolt