@ACURA

Service Bulletin

16-008

January 21, 2017

05612 Version 4

High Pressure Fuel Pump Chirps
(Supersedes 16-008, dated October 4, 2016, to revise the information highlighted in yellow)
AFFECTED VEHICLES
Year

Model

Trim

VIN range

2014-17

MDX

ALL

ALL

2015-17

TLX

ALL with V6

ALL

2014-17

RLX

ALL

ALL

2014 and 2016-17

RLX Hybrid

ALL

ALL

REVISION SUMMARY

Under AFFECTED VEHICLES, the model year 2017 was added to RLX Hybrid. Under PARTS INFORMATION the Fuel
Joint Pipe Set part number has changed.
SYMPTOM

The high pressure fuel pump area chirps after the engine is warm.
POSSIBLE CAUSES

The high pressure fuel pump is making a chirp.
NOTE: This noise does not impact pump, or engine function, or reliability.
CORRECTIVE ACTION

Replace the high pressure fuel pump.
PARTS INFORMATION
Part Name

Part Number

Quantity

Fuel Joint Pipe Set

16012-R9P-315

1

High Pressure Fuel Pump

16790-SJ6-305

1

Retainer

17711-S0X-931

1

Intake Manifold Gasket (top)

17112-SG0-A01

1

Intake Manifold Gasket

17105-R9P-A01

1

Intake Manifold Base Gasket (RR)

17065-R9P-A01

1

Intake Manifold Base Gasket (FR)

17055-R9P-A01

1

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.

© 2017 American Honda Motor Co., Inc. - All Rights Reserved

Page 1 of 7

WARRANTY CLAIM INFORMATION

The normal warranty applies.
Operation
Number

Description

Flat Rate
Time

Defect
Code

Symptom
Code

Template ID

Failed Part
Number

1211 U6

Replace the high
pressure fuel pump
(MDX).

1.8 hrs

03214

04201

16-008N

16790-SJ6-305

1211 FG

Replace the high
pressure fuel pump
(TLX).

1.9 hrs

03214

04201

16-008P

16790-SJ6-305

1211 U6

Replace the high
pressure fuel pump
(RLX).

1.7 hrs

03214

04201

16-008Q

16790-SJ6-305

1211 U6

Replace the high
pressure fuel pump
(RLX Hybrid).

1.7 hrs

03214

04201

16-008R

16790-SJ6-305

Skill Level:

Repair Technician

DIAGNOSIS

1.

With the hood open, listen for a chirping with the engine warmed up.

•
•
•

If the noise is coming from the high pressure fuel pump, go to REPAIR PROCEDURE.
If the noise is coming from the timing belt area, refer to service bulletin 14-025, Timing Belt Chirps.
If the noise is not coming from the high pressure fuel pump or timing belt, continue with normal troubleshooting.

REPAIR PROCEDURE

1.

Relieve the fuel pressure.

2.

Set the No. 1 piston at top dead center (TDC).

3.

Remove the intake manifold and intake manifold base. See service information.
Note: Removal of the throttle body from the intake manifold is not required. Seal the two water hoses and leave it
attached to the intake manifold

4.

Remove the high pressure fuel pump cover.

Page 2 of 7

5.

Remove the quick-connect fitting cover.

QUICK-CONNECT
FITTING COVER

6.

Disconnect the quick-connect fitting.

7.

Remove the fuel joint pipe.

8.

Disconnect the high pressure fuel pump connector.

HIGH PRESSURE
FUEL PUMP

9.

Remove the bolts by loosening them alternately, then remove the high pressure fuel pump and the roller.

Page 3 of 7

10. Rotate the crankshaft and check the high pressure fuel pump cam for pits, scores, and excessive wear. If needed,
replace the rear camshaft.

11. Set the No. 1 piston at top dead center (TDC).
12. Install the roller onto the high pressure fuel pump cam.

13. Set the gauge on the roller and hold it, then set the dial to zero.
14. Rotate the crankshaft 720° and measure the three cam lobes height. If the cam lobes are excessively worn, replace
the rear camshaft.
NOTE: The high pressure fuel pump cam has three cam lobes. Cam Lobe Height Standard (New): 0.236 in
(6.0 mm)
15. Set the No. 1 piston at top dead center (TDC).
16. Check the position of the cam that drives the high pressure fuel pump as shown.
CAM

~-]~
0

Page 4 of 7

17. Coat the roller and the cam with clean engine oil.

18. Install the roller and the high pressure fuel pump. Install the bolts loosely by hand in an alternate pattern. Connect
the connector.
NOTE: Failure to install a new fuel joint pipe will cause fuel leaks.
19. Lubricate the top of the new fuel joint pipe and the threaded area of the fuel rails and the high pressure fuel pump
with polyethylene glycol included in the new fuel joint pipe kit.
NOTE: Do not reuse the fuel joint pipe.
NEW FUEL
JOINT PIPE

THREADED
AREA

Lubricate.

Lubricate.

q])Dth

Page 5 of 7

20. Tighten the fuel joint pipe nuts by hand until the end of the joint pipe is seated on the fuel rails and high pressure
fuel pump.

FUEL JOINT

21. Set the fuel joint pipe bracket on the cylinder head and loosely install the bolts
22. Tighten the high pressure fuel pump mounting bolts to the specified torque.

FUEL JOINT
PIPE BRACKET
MOUNTING BOLT

12 N-m (9 lb-ft)

FUEL JOINT
PIPE BRACKET
MOUNTING BOLT

12 N-m (9 lb-ft)

23. Tighten the fuel joint pipe bracket mounting bolts and the fuel joint pipe nuts to the specified torque in the numbered
sequence shown.
NOTE:
• A crowfoot-type special tool increases the torque applied by the torque wrench. Refer to Torque Specifications
for details on how to recalculate the torque wrench setting.
•
Failure to tighten the fuel joint pipe nuts to the proper torque will cause a fuel leak.
24. Connect the quick-connect fitting and install the quick-connect fitting cover.
25. Set the power mode to ON, but do not start the engine. After the fuel pump runs for about 2 seconds, the fuel line
will be pressurized. Repeat this two or three times, then check for fuel leakage.

Page 6 of 7

26. Install the high pressure fuel pump cover and torque it to 12 N·m (9 lb-ft).

27. Install the intake base and intake manifold.
END

Page 7 of 7