B14-025

Service Bulletin
August 6, 2020
14-025
14695 Version 5
Timing Belt Chirps
Supersedes 14-025, dated April 22, 2016, to revise the information highlighted in yellow.
AFFECTED VEHICLES
Year
Model
2014–18
MDX
2019
MDX
2019
MDX
2019
MDX
2014–18
RLX
2019
RLX
2014
RLX Sport Hybrid
2016–18
RLX Sport Hybrid
2019
RLX Sport Hybrid
2015–18
TLX
2019
TLX
2019
TLX
Trim Level
ALL
2WD
AWD
Sport Hybrid
ALL except Sport Hybrid
ALL except Sport Hybrid
ALL
ALL
ALL
ALL with V6
2WD with V6
AWD with V6
VIN Range
ALL
5J8YD3…KL000001 thru 5J8YD3…KL005096
5J8YD4…KL000001 thru 5J8YD4…KL011104
5J8YD7…KL000001 thru 5J8YD7…KL000483
ALL
JH4KC1…KC000001 thru JHRKC1…KC000064
ALL
ALL
JH4KC2…KC000001 thru JHRKC2…KC000369
ALL
19UUB2…KA000001 thru 19UUB2...KA007635
19UUB3…KA000001 thru 19UUB3...KA005453
REVISION SUMMARY
The AFFECTED VEHICLES section was extensively changed.
SYMPTOM
The timing belt area makes a chirping noise after the engine warms up.
POSSIBLE CAUSES
The timing belt contacts the back edge of the crankshaft pulley.
CORRECTIVE ACTION
Do the diagnosis and, based on the results, install an idler pulley shim.
PARTS INFORMATION
Required Parts for all models:
Part Name
Idler Pulley Shim
Timing Belt Idler Bolt
Flange Bolt 10 mm x 60 mm
Part Number
14559-RCA-305
14551-RCA-A01
90168-TA1-A00
Quantity
1
1
2
CLIENT 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 Acura automobile dealer.
© 2020 American Honda Motor Co., Inc. – All Rights Reserved
Page 1 of 15
For MDX, add the following:
Part Name
O-Ring
Flange Bolt 10 mm x 85 mm
Flange Bolt 10 mm x 105 mm
Flange Bolt 12 mm x 45 mm
Part Number
91319-R70-A01
90002-R70-A00
95801-10105-08
90165-SDA-A00
Quantity
1
1
2
1
For RLX (except Sport Hybrid), add the following:
Part Name
O-Ring
Flange Bolt 10 mm x 85 mm
Flange Bolt 10 mm x 105 mm
Flange Bolt 12 mm x 45 mm
Part Number
91319-PAA-A01
90002-R70-A00
95801-10105-08
90161-SDA-A01
Quantity
1
1
2
1
For RLX Sport Hybrid, add the following:
Part Name
Oil Filter Base Gasket
Pre-Chamber Gasket
Flange Bolt 10 mm x 35 mm
Flange Bolt 10 mm x 35 mm
Flange Bolt 10 mm x 60 mm
Flange Bolt 10 mm x 75 mm
Flange Bolt 12 mm x 45 mm
Flange Nut 12 mm
Self-Lock Nut 10 mm
Part Number
15302-5G0-A00
18393-SJA-A01
90163-SDA-A01
90161-T2A-A00
90164-TY3-A01
90002-R8A-A00
90161-SDA-A01
90371-SEF-000
90212-SA5-003
Quantity
1
1
2
2
2
3
1
4
3
For TLX, add the following:
Part Name
O-Ring
Flange Bolt 10 mm x 85 mm
Flange Bolt 10 mm x 105 mm
Flange Bolt 12 mm x 45 mm
Part Number
91319-R70-A01
90002-R70-A00
95801-10105-08
90161-SDA-A01
Quantity
1
1
2
1
REQUIRED TOOLS
Part Name
Tool Number
Quantity
Holder Handle
07JAB-001020B
1
Pulley Holder
07MAB-PY3010B
1
Breaker Bar (commercially available)
07JAA-001020A
1
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WARRANTY CLAIM INFORMATION
The normal warranty applies.
Model
Operation
Number
Description
Flat Rate
Time
Defect
Code
Symptom
Code
Template
ID
Failed Part
Number
MDX
1110A7
Diagnose, and install an
idler pulley shim.
2.6 hr
07403
04201
14-025N
14400-R9P-A01
RLX
1110A7
Diagnose, and install an
idler pulley shim.
2.6 hr
07403
04201
14-025P
14400-R9P-A01
TLX
1110A7
Diagnose, and install an
idler pulley shim.
2.6 hr
07403
04201
14-025Q
14400-R9P-A01
RLX
Sport
Hybrid
1110A7
Diagnose, and install an
idler pulley shim.
4.3 hr
07403
04201
14-025R
14400-R9P-A01
Skill Level: Repair Technician
DIAGNOSIS
NOTE: During the diagnosis and repair, follow the procedures listed below. For more detail about any of these
procedures, see the applicable service information.
• Wheel Removal and Installation
• Engine Undercover Removal and Installation
• Drive Belt Removal and Installation
• Crankshaft Pulley Removal and Installation
• Timing Belt Removal and Installation
• Side Engine Mount Removal and Installation
• Timing Belt Auto-Tensioner Removal and Installation
1. Start the engine, let it warm up, and listen for a chirp.
Below is an example of the chirp:
NOTE: It can take up to 30 minutes for the engine to become hot enough to hear a chirp.
Do you hear a chirp?
• If you hear a chirp coming from the timing belt area, go to step 2.
• If you hear a chirp coming from the high pressure fuel pump, refer to service bulletin 16-008, High Pressure
Fuel Pump Chirps.
• If you do not hear a chirp, this bulletin does not apply. Continue with normal troubleshooting procedures.
2. Remove the drive belt and retest the engine while it is hot.
•
•
If you hear a chirp, go to step 3.
If you do not hear a chirp, this bulletin does not apply. Continue with normal troubleshooting procedures.
CLIENT 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 Acura automobile dealer.
© 2020 American Honda Motor Co., Inc. – All Rights Reserved
Page 3 of 15
3. RLX Sport Hybrid only: Disconnect the high-voltage cable to the electric A/C compressor (the compressor is not
removed). Refer to the electric A/C compressor removal procedure in the service information (steps 2, 3, and 8).
NOTE: Because there is limited space between the timing belt covers and the shock tower, remove the front strut
brace and lift the engine about 35 mm to remove the timing belt covers.
4. RLX Sport Hybrid only: Remove the timing belt covers. Refer to the timing belt removal procedure in the service
information (steps 1–4 and 7–17)
5. RLX Sport Hybrid only: Install/connect the following components: exhaust pipe A, the lower half of the side engine
mount bracket, the high-voltage cable to the electric A/C compressor, and the oil filter base/oil cooler/oil filter
assembly. Then, install the service plug and connect the 12-volt battery terminal. Go to step 12.
NOTE: Reuse the original oil filter base gasket and replace with the new gasket during final assembly.
6. Remove the right front wheel.
CLIENT 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 Acura automobile dealer.
© 2020 American Honda Motor Co., Inc. – All Rights Reserved
Page 4 of 15
7. Remove the engine undercover.
8. Hold the crankshaft pulley with the holder handle and the pulley holder.
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9. Remove the crankshaft bolt with a heavy duty 19 mm socket and a breaker bar, then remove the crankshaft pulley
and washer. Temporarily reinstall the crankshaft bolt.
10. If equipped, remove the ECU and move to the side. Then, remove the front and rear upper covers, and install the
ECU.
NOTE: Keep the A/C pressure sensor harness out of the way of moving parts by attaching it to the A/C line with a
zip tie.
11. Remove the lower cover.
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12. Start the engine while it is still hot, then spray the back edge of the timing belt with water while it is running.
NOTE: On RLX Sport Hybrid models there are more disassembly steps that could allow the engine to cool, you may
have to warm up the engine before squirting the timing belt with water to see if the chirp lessens.
Do you still hear a chirp?
• If the chirp lessens, changes pitch, or goes away, go to REPAIR PROCEDURE.
• If the chirp does not change, this bulletin does not apply. Continue with normal troubleshooting procedures.
REPAIR PROCEDURE
1. Make sure the engine is off, then try to insert a 0.95 mm feeler gauge between the top edge of the timing belt idler
pulley and the back side of the side engine mount bracket that overhangs the pulley.
NOTE: Make sure you remove the feeler gauge from its holder to get a more accurate measurement.
• If you can insert the feeler gauge between the timing belt idler pulley and engine mount bracket, go to step 4.
• If you cannot insert the feeler gauge, go to step 2.
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2. Remove the side engine mount bracket.
3. Using a die grinder with a 2-inch grinding disc, use the circular casting offset as a guide to grind the side engine
mount bracket until the lip measures 2 mm in thickness.
NOTE: Use a vernier caliper or micrometer to confirm the amount of material removed.
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4. Set the engine to TDC (top dead center).
•
Align the TDC mark on the tooth of the timing belt drive pulley with the pointer on the oil pump.
•
Align the TDC marks on the camshaft pulleys with the pointers on the back covers.
5. Thread and hand-tighten a battery clamp bolt as shown to hold the timing belt adjuster in its current position.
NOTE: Do not use a wrench to tighten the battery clamp bolt.
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6. Remove the idler pulley.
7. Keep timing belt timed to both cam pulleys.
8. RLX Sport Hybrid only: Remove the oil filter base/oil cooler/oil filter assembly without disconnecting the water hoses
to access the timing belt auto-tensioner bolts.
9. All except RLX Sport Hybrid: Remove the rocker arm oil pressure sensor from the oil filter housing to access the
timing belt auto-tensioner bolts.
•
•
•
Disconnect the rocker arm oil pressure sensor connector.
Remove the rocker arm oil pressure sensor.
Remove any old liquid gasket from the switch and the switch mounting hole.
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10. Remove the battery clamp bolt from the timing belt adjuster, then remove the timing belt auto-tensioner.
11. Place the idler pulley shim between the idler pulley and the oil pump housing; loosely install the new idler pulley bolt
with Hondalock 1 applied to its threads. Make sure you follow the instructions on the Hondalock 1 container.
NOTE: The shim is tapered from left to right. The word OUT is stamped into the tang and painted white. It should be
readable after the shim is installed.
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12. Install the new idler pulley bolt:
•
Insert the square end of a ¼-inch-drive ratchet extension to keep the shim’s tang in the correct position.
•
•
Tighten the idler pulley bolt to 44 N·m (33 lb-ft).
Bend the shim’s tang slightly towards the oil pump housing to keep it away from the idler pulley.
13. Compress the timing belt auto tensioner.
•
•
Align the holes on the rod and timing belt auto-tensioner housing.
Use a hydraulic press to slowly compress the timing belt auto-tensioner. Insert a 2 mm (5/64 in) pin through
the housing and the rod.
14. Thread and hand-tighten a battery clamp bolt to hold the timing belt adjuster.
NOTE: Do not use a wrench to tighten the battery clamp bolt.
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15. Install the timing belt auto-tensioner. Do not remove the pin.
16. All except RLX Sport Hybrid: Install the rocker arm oil pressure sensor.
• Apply Hondabond 4 liquid gasket to the rocker arm oil pressure sensor threads.
NOTE: Do not use too much liquid gasket because excessive liquid may enter the oil passages or block the end
of the sensor.
• Install the rocker arm oil pressure switch with a new O-ring.
• Connect the rocker arm oil pressure switch connector.
17. Confirm the timing belt is in correct time.
18. Remove the pin from the timing belt auto-tensioner.
19. RLX Sport Hybrid only: Disconnect the high voltage cable to the electric A/C compressor. Refer to the electric A/C
compressor installation procedure in the service information (steps 2, 3, and 8).
20. RLX Sport Hybrid only: Install the timing belt covers. Refer to the timing belt installation procedure in the service
information (steps 7–27). Go to step 30.
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21. Install the side engine mount with the new bolts and torque them as shown.
22. Remove the ECU. Install the upper and lower covers and torque the bolts to 12 N·m (9 lb-ft), then, install the ECU,
and torque the bolts to 9.3 N·m (6.9 lb-ft).
23. Remove the crank pulley bolt.
24. Remove any oil and clean the crankshaft pulley, washer, and bolt. Lubricate with new engine oil as shown.
Page 14 of 15
25. Install the crankshaft pulley and torque the bolt to 65 N·m (48 lb-ft).
26. Tighten the bolt an additional 60 degrees.
27. Install the drive belt.
28. Install the engine undercover.
29. Install the right front wheel and torque the nuts.
•
•
RLX: 127 N·m (94 lb-ft)
MDX: and TLX: 108 N·m (80 lb-ft)
30. RLX Sport Hybrid only: Connect the high-voltage cable to the electric A/C compressor, install the service plug, and
connect the 12-volt battery terminal. Refer to the electric A/C compressor installation procedure in the service
information (steps 4, 9, and 10).
31. Do the CKP-pattern clear and the CKP-pattern learn procedure using the i-HDS.
NOTE: If you do not do these procedures, the PCM may falsely detect a misfire and set a DTC when there is no
misfire.
END
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