Service Bulletin
August 6, 2024

23-050
Version 4

A/C Compressor Shaft Seal Leak
Supersedes 23-050, dated June 19, 2024 to revise the information highlighted in yellow.
AFFECTED VEHICLES
Year

Model

Trim

VIN Range

2019–20

Pilot

Elite, Touring, Black

ALL

2021

Pilot

ALL

ALL

2019–21

Passport

ALL

ALL

2020–21

Ridgeline

ALL

ALL

REVISION SUMMARY
Under WARRANTY CLAIM INFORMATION, text was added.
SYMPTOM
Customer complaint of the A/C not blowing cold air.
POSSIBLE CAUSE
Oil/Refrigerant leak from the A/C compressor shaft seal.
CORRECTIVE ACTION
Do the inspection procedure and, if directed, replace the compressor shaft seal.
PARTS INFORMATION
Part Name

Part Number

Quantity

Seal Set Assembly (Kit Contains: Bolt, Washer Set, Pulley
C-Ring, Felt Washer, Shaft Seal, Seal C-Ring, Suction Port
Plug, Discharge Port Plug)

38918-64A-318

1

Discharge Hose O-Ring (1/2”)

80872-SN7-003

1

Suction Hose O-Ring (5/8”)

80871-SN7-003

1

CUSTOMER INFORMATION: The information in this bulletin is intended for use only by skilled technicians who have the proper tools, equipment,
and training to correctly and safely maintain your vehicle. These procedures should not be attempted by “do-it-yourselfers,” and you should not
assume this bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this information applies, contact
an authorized Honda automobile dealer.

© 2024 American Honda Motor Co., Inc. – All Rights Reserved

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REQUIRED MATERIALS
Part Name

Part Number

Quantity

RB100EV Oil

38899-64A-A02

1

Part Name

Part Number

Quantity

A/C Compressor Seal Puller

07AAC-5AAA100

1

A/C Compressor Seal Guide

07AAG-5AAA101

1

A/C Compressor Seal Driver

07AAE-5AAA101

1

7CVC Seal Press

07AAD-5J6A100

1

TOOL INFORMATION

The above tools were auto-shipped to dealers in June 2023. For support or replacements, please contact Special Tools
Hotline at (800) 346-6327.
WARRANTY CLAIM INFORMATION
The normal warranty applies.
Operation
Number

Description

Flat Rate
Time

614130

Replace the A/C
compressor shaft seal
(includes inspection).

2.3 hr

620025

Evacuate and recharge

0.7 hr

Defect
Code
07408

Symptom
Code
03217

Template
ID
A23050A

Failed Part Number
38810-5J6-A22

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INSPECTION PROCEDURE
1. Remove the right-front tire.
2. Remove the engine Undercover.

3. Remove the drive belt.

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4. Inspect for oil on the armature plate surface of the compressor.
NOTE: If any oil is stuck to the armature plate surface of the compressor, then proceed to the repair procedure.

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5. If no oil is noticed, leave the compressor on the vehicle. Remove the center hub bolt while holding the armature plate
with the A/C clutch holder and remove the armature plate from the compressor. Then inspect both for oil.
NOTE:
•
•

If oil is present on the hub/armature plate, then proceed to the repair procedure.
If no oil is present, then proceed to step 6.

Examples of dry and oily clutch assemblies.

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6. Remove the felt washer from the compressor and gently place it on a clean sheet of paper.
NOTE: If oil transfers from the felt washer to the paper after 10 seconds, proceed to the repair procedure. If not,
continue to the next step.

7. Using a calibrated leak detector, check for a leak.
NOTE:
•

Use a leak detector for at least 5 minutes around the snout of the compressor.

•

An A/C compressor that has not been engaged will yield better results. The longer the A/C compressor has not
been run, the better chance you will have at detecting a leak.

•

A higher engine temperature produces more accurate results.

•

If a leak is detected, proceed to the repair procedure.

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8. If no oil or leak is found, reassemble the hub/armature plate with the original bolt and torque to (17 N·m or 13 lb-ft).
If this is a second time and no leak is found, reassemble the hub/armature plate with a new bolt and torque to 17 N.m (13
lb-ft).
NOTE:
•

Verify that the armature plate and pulley rotate smoothly and independently.

•

Measure the clearance between the pulley and armature plate all the way around. If clearance is not within
specified limits, remove the armature plate and add/or remove shims as needed.

•

Clearance: 0.30–0.70mm (0.012–0.027in).

•

Shims are available in three sizes: 0.3mm, 0.4mm, 0.5mm.

9. Install the drive belt, run the vehicle for ten minutes and redo step 7 again.
NOTE: If no leak or oil found after completing the second time, then continue with the normal leak check procedure of
other A/C components.
REPAIR PROCEDURE
Chance for fluids to enter eyes and/or hands which can cause injury. Use safety glasses and rubber gloves.
Click here to view a video of the seal repair procedure:
1. Connect an A/C recover/recycle/recharge machine to the high-pressure service port and the low-pressure service port
following the equipment manufacturer’s instructions.

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2. Recover the A/C refrigerant.
3. Remove the front bulkhead cover.

4. Remove the intake air guide.

5. Remove the bolts form the front center upper beam B.

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6. Unbolt the front bulkhead and move it aside, then remove the front center upper beam B.
NOTE: You may need to move the front center upper beam B back and forth to clear the center lip from the radiator to
remove it.

7. Remove A/C fan shroud.
8. Remove the passenger’s side front bulkhead brace.

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9. Disconnect the discharge and suction hose.
NOTE: Use the port plugs in the seal assembly kit to immediately seal the ports after disconnection. This avoids
moisture and dust contamination from entering the A/C compressor. Installing an A/C compressor into a contaminated
system can result in premature A/C compressor failure.

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10. Remove the A/C compressor.
NOTE: Lay a piece of cardboard at the radiator fins to avoid damage when removing the A/C compressor.

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11. If the armature plate has not been removed from the previous step, remove the center hub bolt while holding the
armature plate with the A/C clutch holder.

12. If the armature plate has not been removed from a previous step, remove the clutch while being careful not to
drop/lose any shims (usually 1–2).

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13. If the felt washer has not been removed from a previous step, use a pick to remove the felt washer.

14. Remove the pulley C-ring.

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15. Remove the pulley.

16. Remove the seal C-ring.

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17. Thoroughly clean the bore and shaft with a lint free cloth.
NOTE: Do not use compressed air. The bore needs to be very clean as to prevent debris from entering the compressor
once the seal is removed. Failure to remove all debris will result in future failure.

18. Remove the side of bracket.

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19. Place the press tool onto the A/C compressor and insert the holding pins (2). Make sure the press tool installs where
the press shaft should align with compressor shaft. The press tool will only align correctly in one orientation. The pins
must go all the way through.

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20. Add the press adapter tool.

21. Add grease to the press adapter button and press threads.

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22. Tighten the press until there is no clearance, then 3/4 turn (270°).
NOTE:
•

The purpose of this step is to break the compressor shaft seal loose.

•

Turning the handle more than 3/4 turn (270 degrees) can damage the tool and seal making it difficult to remove
the compressor shaft seal.

23. Release to remove the adapter and press.
24. Insert the Cylinder tool on to the A/C compressor.

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25. Insert the extractor tool, and make sure the 24 mm nut is positioned towards the top. Look into the cylinder window to
align the extractor tool onto the flange and press the handle fully down to grab the seal.
NOTE: the 24 mm nut will use a 36 mm wrench.

26. Stabilize the extractor tool using a 19 mm wrench on the top. Then, turn the handle clockwise until the resistance is
felt. Make sure that the space between the 19 mm wrench and the bottom portion of the extractor tool is minimal.
NOTE: To confirm the extractor is engaged, hold the extractor tool and lift the compressor up.

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27. Apply grease between the 24 mm nut and cylinder top.

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28. With the 19 mm wrench in place, lower the 24 mm nut down until it reaches the cylinder. Slowly and carefully adjust
until the extractor tool comes out freely with the seal.
NOTE:
•

Resistance will be felt while lowering 24 mm nut and will cease once the seal is extracted.

•

If the seal does not come out on the first step, repeat the process starting at step 13.

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29. Thoroughly clean the bore and shaft with a lint free cloth
NOTE: Do not use compressed air. The bore needs to be very clean as to prevent debris from entering the compressor
once the seal is installed. Failure to remove all debris will result in future failure.

30. Inspect the compressor shaft bore for visible damage; Inspect the seal guide for contamination or damage.
31. Lubricate the new seal outer surface, seal guide, and bore with new POE air conditioning oil.
NOTE: Avoid touching the center of the seal to prevent cross-contamination of the A/C refrigerant system.

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32. Insert the seal guide tool onto A/C compressor shaft.

33. Insert the new seal onto the seal guide tool.
NOTE: The seal is directional and must be placed with the metal side upward.

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34. Insert the press adapter tool over the seal guide. By hand, press down to seat the new seal about 5 mm below the top
edge of the bore and remove the press adapter.

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35. Insert the new seal C-ring with the teeth’s rounded side pointing down into the bore.

36. Install the press tool.

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37. Tighten the press by rotating the handle clockwise until it reaches the adapter tool. Slowly and carefully continue to
rotate the handle clockwise until the seal is pressed down roughly 10 mm below the top edge of the bore.
NOTE: Tighten the press until the C-clip is installed into the clip groove. There will be a sound or vibration felt when the
C-clip is fully set.

38. Remove the press and the adapter tool when complete.
39. Clean the pulley and A/C compressor friction surfaces with Honda Brake Cleaner or equivalent.
40. Install the pulley.
41. Install the pulley outer C-ring.
NOTE: C-ring for pulley and felt seal must be replaced.
42. Install new felt washer.
43. Measure existing shims with calipers and make sure the thickness is the same.
44. Install the clutch plate and shims.
45. Install the new clutch center flange bolt and tighten to 17 N.m (13 lb-ft).
46. Fill compressor with the contents of one can of POE compressor oil.
47. Mount the side brackets.
48. Install the compressor.
49. Connect the suction and discharge hoses.
NOTE: Make sure to replace O-rings as needed.
50. Install drive belt.
51. Install remaining parts.
52. If the system is OK, recharge A/C system. Fill the A/C system with the correct amount of A/C Refrigerant.
53. Set the A/C system to MAX COOL, and run the vehicle for ten minutes between 1,500-2,000 RPM.
NOTE: Use the calibrated leak detector in the area of the shaft seal.
54. Turn to the off mode, use the calibrated leak detector to check around the clutch and O-ring area, without the engine
running.
55. If no leak is detected, install the tire, and undercover.

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