Altima 2.5 SL L4-2.5L (QR25DE) (2002)
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Be careful NOT to damage the Oxygen sensors when performing this procedure.
29.
Remove three screws and remove the old Upper Rear Heat Shield from the manifold (see Figure E22).
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IMPORTANT:
Use "penetrating" oil. Loosen screws 1/2 turn with hand-tool (do not use power tool) and apply penetrating oil before removing screws
completely.
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Confirm there is no damage to the threads inside the mounting bosses.
^
If you break off a heat shield screw(s) in an Exhaust Manifold/Catalyst that is supposed to be re-used on the vehicle, perform Procedure G -
Install "Keen-Sert(s)" As Needed.
30.
Install the new Rear Heat Shield onto the old Exhaust Manifold/Catalyst with four new screws (see Figure E23a).
31.
Turn the manifold over (see Figure E23b).
32.
Remove the three screws that secure the old Front Lower Heat Shield onto the manifold. Leave the heat shield in position, as it does not get
replaced.
^
IMPORTANT:
Use "penetrating" oil. Loosen screws 1/2 turn with hand-tool (do not use power tool) and apply penetrating oil before removing screws
completely.
^
Confirm there is no damage to the threads inside the mounting bosses.
^
If you break off a heat shield screw(s) in an Exhaust Manifold/Catalyst that is supposed to be re-used on the vehicle, perform Procedure G -
Install "Keen- Sert(s)" As Needed. See page 33 of this bulletin.
