Procedure B

Procedure B Replace all Power Valve Screws and check/replace any loose Power Valve Plates as follows:





NOTE:
To perform this procedure, you'll need:

^ Power Valve Screws P/N 14511-8J0B (see Figure B1)

^ Essential Torque Screwdriver J-47327 (see Figure B1)

^ Essential Power Valve Alignment Tool J-47437 (see Figure B1)

^ Three Bond 1375B Thread Locker P/N 14511-8J01B (see Figure B1).

^ Genuine Nissan Brake Cleaner P/N 999MP-AH001P (see Figure B1).





1. Apply vacuum to the Power Valve Actuator until the Power Valve Plates open. See Figure B2.





2. "Wiggle" (lift up and down ONLY) each Power Valve Plate to check for looseness on the pivot shaft (see Figure B3).

a. If any of the Power Valve Plates are loose, mark them with a permanent marker to indicate that they need to be replaced. You'll replace loose Plates later in this procedure. Go to the next step.

b. If the Power Valve Plates are NOT loose, do NOT mark them with a permanent marker as they do not need to be replaced. Go to the next step.

3. Release the vacuum from the Power Valve Actuator so the Power Valve Plates close.





4. Loosen (but do NOT remove) all eight Power Valve Screws (see Figure B4). This will allow you to install the Power Valve Alignment Tool to ensure proper Plate alignment (covered later in this procedure).





5. Re-apply vacuum to the Power Valve Actuator until the Power Valve Plates open. See Figure B5.





6. Install the Essential Power Valve Alignment Tool J-47437 onto the Intake Manifold (see Figure B6), making sure:

^ All Power Valve Plates are open when installing the Alignment Tool.

^ The gasket between the Intake Collector and Intake Manifold is removed.

^ The Tool is completely seated and flush with the Intake Manifold sealing surface.





7. Remove the vacuum from the Power Valve Actuator and make sure the Power Valve Plates are:

^ Completely closed.

^ "Centered" between the Shims on the Alignment Tool.

8. Remove ONLY one Power Valve Screw at a time.

NOTE:
If you have a Power Valve Plate that you found to be loose (marked with a permanent marker), replace it after you replace all the Power Valve Screws on Plates that are not loose. Replacing loose Power Valve Plates is covered in step 11.

9. Clean and dry each Power Valve Screw Hole as follows:





a. Spray Genuine Nissan Brake Cleaner (P/N 999MP-AH001P) into each Screw Hole for about one second. See Figure B8.





b. Apply clean, dry shop air until each Screw Hole is dry (see Figure B9).

10. Carefully install one new Power Valve Screw (from Kit P/N 14511-8J01B) at a time as follows:





a. Apply one drop of Three Bond 1375B Thread Locker onto the new Screw (see Figure B10).





b. Using the essential Torque Screwdriver J-47327, tighten the Screw until the tool clicks. See Figure B11.

NOTES:
^ The Torque Screwdriver is preset (fixed) to the correct tightening torque value. It does not need to be adjusted.

^ Don't strip the Screw Head:

Make sure the screwdriver tip is fully "engaged" (seated) in the screw head and the "axis" of the screwdriver is in line with the "axis" of the screw (they are lined up properly).

^ If the Screw head strips during the tightening process and the Screw cannot be removed, replace the Intake Manifold.

c. Perform this procedure on all eight new Screws.

11. If you have a Power Valve Plate that you found to be loose (marked with a permanent marker), replace it as follows:

a. Remove both Screws and remove the Power Valve Plate.

b. Clean and dry the Power Valve Screw holes (refer to step 9).

c. Install the new Power Valve Plate.

d. Install the new Power Valve Screws (refer to step 10).

e. Continue with the next step.

12. Remove the Power Valve Alignment Tool from the Intake Manifold.

13. Check the operation of the Power Valves as follows:





a. Use a Vacuum Pump to open and close (several times) the Power Valves to confirm they smoothly operate.

^ If they do NOT operate smoothly, replace the Intake Manifold Assembly.

*NOTE:
If you install a new Intake Manifold assembly, you don't need to replace the power valve screws. You can install the new intake manifold as-is.*

14. Re-install the Intake Collector, making sure:

^ All components are re-installed in the reverse order they were removed.

^ All wire harnesses are properly routed and securely re-connected.

^ The five bolts and two nuts that secure the Intake Collector to the Intake Manifold are tightened to: 17.6 - 21.6 Nm (1.8 - 2.2 kg-m, 13 - 15 ft-lb).

^ The bolts that secure the Intake Collector Support Bracket are tightened to 17.6 - 21.6 Nm (1.8 - 2.2 kg-m, 13 - 15 ft-lb).

15. If applicable, reconnect the negative battery cable and reprogram all radio station pre-sets.

16. Refer back to the Repair Flow Chart (shown at the beginning of this bulletin) for the next applicable step.