A/C - Compressor Knocking Noises
Classification: HA08-003AReference: NTB08-080A
Date: August 21, 2008
2008-2009 ALTIMA; A/C COMPRESSOR NOISE
The claims information in this bulletin has been amended. No other changes were made.
APPLIED VEHICLE(S): 2008-2009 Altima Sedan & Coupe (L32, CL32), not HEV
APPLIED ENGINE: QR25 ONLY
APPLIED VIN / DATE:
Vehicles built before: 1N4(*)L2 1 E(*)9 C 102404 / 7-28-2008
Vehicles built before: 1N4(*)L2 1 E(*)9 N 400625 / 7-25-2008
Vehicles built before: 1N4(*)L2 4 E(*)9 C 102103 / 7-28-2008
IF YOU CONFIRM
A knocking noise from the A/C compressor clutch during compressor clutch engagement.
ACTIONS
1. Clean the compressor clutch using the Service Procedure in this bulletin.
2. Verify the issue is resolved.
^ If the issue is resolved, no further action required.
^ If the issue is not resolved and the vehicle has a Type A compressor shown above then replace the A/C compressor clutch using the Service Procedure in this bulletin.
^ If the issue is not resolved and the vehicle has a Type B compressor shown above then replace the A/C compressor using the Procedure in the Electronic Service Manual.
IMPORTANT:
The purpose of "ACTIONS" (above) is to give you a quick idea of the work you will be performing. You MUST closely follow the entire Service Procedure as it contains information that is essential to successfully completing this repair.
PARTS INFORMATION
CLAIMS INFORMATION
SERVICE PROCEDURE
1a. Spray Nissan Brake Cleaner for two (2) seconds into the compressor armature slot shown in Figure 1.
1b. Wait thirty (30) seconds.
2. Start the engine and let idle, parking brake set, in Park or Neutral.
3. Set HVAC temperature to MAX cold.
4. Hold the engine at 1500 RPM, turn on A/C and let run for twenty (20) seconds.
5a. Turn off A/C.
5b. Wait five (5) seconds, then turn the A/C back on.
6. Hold the engine at 1500 RPM and repeat steps 5a and 5b ten (10) times.
7a. Turn on A/C and check for compressor clutch noise.
^ If the issue is resolved, no further action required.
^ If the issue is not resolved, continue to step 7b.
7b.Repeat steps 1 through 6, and then check again for noise.
^ If the issue is resolved, no further action required.
^ If the issue is not resolved and the vehicle has a Type "A" compressor then proceed to step 8 and replace the A/C compressor clutch.
^ If the issue is not resolved and the vehicle has a Type "B" compressor then replace the A/C compressor using the Procedure in the Electronic Service Manual.
8. Remove the wheel and tire, inner fender liner, and P/S hose from plastic clips to access the compressor clutch.
NOTE:
The next step is necessary to loosen the anerobic sealer on the clutch retaining bolt.
9. Using a small propane torch heat the clutch retaining bolt head for not more than twenty (20) seconds.
10a. Hold the clutch using OTC P/N 4537 (or equivalent).
10b. USING HAND TOOLS ONLY, loosen the clutch retaining bolt with a Torx T30 bit.
^ DO NOT use power tools to attempt bolt removal.
^ If the Torx does not work, use a Craftsman #4 external stud remover (or equivalent).
^ Lightly tap the stud remover over the bolt head before removal.
NOTE:
The bolt will be discarded after removal.
11a. Take off the compressor clutch drive plate
11b. Confirm if there are shims between the drive plate shaft flange and the compressor shaft.
^ Save the shims, if any, for reinstallation with the new clutch assembly.
12. Remove the snap ring that holds the clutch body to the compressor.
13. Remove the original clutch body and install the replacement clutch body with the snap ring.
14. Place the original shims, if any, onto the compressor shaft.
15. Install the replacement clutch drive plate onto the compressor shaft.
16. Install the new compressor clutch retaining bolt from the Kit into the compressor shaft.
^ Torque the new bolt to: 20Nm (2.03kg-m, 14.7 ft-lb.)
NOTE:
This is a new torque value to be used with the new bolt.
14. Reassemble the remainder of the vehicle in the reverse order of disassembly.