ATTENTION:
GENERAL MANAGER
PARTS MANAGER
CLAIMS PERSONNEL
SERVICE MANAGER

q
q
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IMPORTANT - All
Service Personnel
Should Read and
Initial in the boxes
provided, right.

SERVICE BULLETIN
APPLICABILITY: 2013MY BRZ

NUMBER: 02-151-14R
DATE: 04/22/14
SUBJECT: Revised Valve Train Parts to Reduce a Warm Engine
REVISED: 09/23/14
Tapping Sound from the Left Cylinder Head

INTRODUCTION
This bulletin announces the availability of revised valve train components developed to reduce a
tapping sound (sometimes described as “a sewing machine type” sound) which may be heard coming
from the left-hand (B2) side of the engine when the engine is warm. This bulletin does not address
any cold engine or start-up sounds. The changes consist of:
•
•
•

Design change to the valve rockers
Camshaft profile change
1.65mm longer intake and 2.47mm longer exhaust valve stem lengths

PART INFORMATION
PART NAME

Part Number
INTAKE VALVE

Change
Identification
Part Number

EXHAUST VALVE

Change
Identification
Part Number

VALVE ROCKER

Change
Identification

INTAKE CAMSHAFT, LEFT

Part Number
Change
Identification

NEW

OLD

13201AA660

13201AA600

Stem Length:
104.95mm
I3H
13202AA790
Stem Length:
97.57mm
E3H
13249AA250
Change to Roller
Portion
Circular groove added
on pivot side
13037AA980
Cam Profile Change
38B370

Stem Length:
103.3mm
I2H
13202AA710
Stem Length:
95.1mm
E2H
13249AA240
n/a
n/a
13037AA830
n/a
38B230

Continued...
CAUTION: VEHICLE SERVICING PERFORMED BY UNTRAINED PERSONS COULD
RESULT IN SERIOUS INJURY TO THOSE PERSONS OR TO OTHERS.
Subaru Service Bulletins are intended for use by professional technicians ONLY. They
are written to inform those technicians of conditions that may occur in some vehicles, or
to provide information that could assist in the proper servicing of the vehicle. Properly
trained technicians have the equipment, tools, safety instructions, and know-how
to do the job correctly and safely. If a condition is described, DO NOT assume that this
Service Bulletin applies to your vehicle, or that your vehicle will have that condition.

Bulletin Number: 02-151-14R; Date: 09/23/14

SUBARU OF AMERICA, INC. IS
“ISO 14001 COMPLIANT”
The international standard for excellence
in Environmental Management Systems.
Please recycle or dispose of automotive
products in a manner that is friendly to our
environment and in accordance with all
local, state and federal laws and regulations.

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NEW

OLD

Part Number

13052AA980

13052AA830

Change

Cam Profile Change

n/a

Identification

53B370

53B230

Part Number

13296AA090

13296AA070

PART NAME

EXHAUST CAMSHAFT, LEFT

PIVOT, ROCKER ARM

Addition of
groove

Identification
Markings

The illustrations below show additional information about the changes to the valve rockers, camshafts
and valves to help readily distinguish them from the previous version parts.
SERVICE PROCEDURE / INFORMATION
If you receive a customer concern of a tapping sound from the B2 cylinder head, confirm it is isolated
to the B2 valve train area before proceeding with any repairs. Once verified, order and replace the
intake and exhaust camshafts, the 4 intake valves, 4 exhaust valves, all 8 rockers and all 8 pivots.
Refer to the service procedures outlined in the applicable Service Manual for installation.
NOTE: When setting the valve clearances, the intakes should be set to 0.13mm +0.02 / - 0.03
and the exhausts set to 0.22mm +/- 0.02. These are revised clearance specifications and are not
reflected in the Service Manual.
IMPORTANT: Do not mix old and new parts together as it will become impossible to obtain intake
valve clearances that are within specification.
TIP: An egg carton makes a perfect organizer tray. Make sure to mark it as necessary (front, intake,
exhaust) to eliminate any mixing of parts.

Continued...
Bulletin Number: 02-151-14R; Date: 09/23/14

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WARRANTY / CLAIM INFORMATION
For vehicles within the Basic New Car Limited and/or Powertrain Warranty, this repair may be
claimed using the following information:
LABOR DESCRIPTION

LABOR
OPERATION #

H4 ENGINE R&R FOR CYLINDER HEAD
SERVICING

B293-130

LH CYLINDER HEAD R&R

C293-132

TRANSMISSION

LABOR
TIME

M/T

2.8

6AT

3.3
5.2

AER-48

ALL INTAKE VALVES REPLACE, ONE
CYLINDER HEAD Includes: Valve Seating,
R&R of the Springs, Valve Seals & Valve
Adjustment

C293-123

VALVE TRAIN NOISE DIAGNOSIS

C243-001

Bulletin Number: 02-151-14R; Date: 09/23/14

FAIL
CODE

All

1.6

0.3

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