Bulletin Number: WTY-84R; Revised: 05/06/20

Page 20 of 42

VERY IMPORTANT NOTES:
•

When using the above compressor and spring installation tools, use ONLY the tool specified
for the specific task being performed. Although some of these tools look very similar to
each other, there are significant design differences in each which make them specific for each
function of this procedure. This is why they have the paint markings and alpha-numeric
identification information etched onto them.

•

It is strongly recommended to keep these special tools in the compartments of the storage box
they were shipped in as each tool is used as shown in the photo above. When an operation
is done, put the tool used for that operation back into its individual spot in the storage box.
This will minimize chances of mis-placing or dropping / damaging them along with helping
to stay organized.

•

All of the 6 mm bolts securing the bridge bases to the head and the brackets to the bridge
bases do not need to be any more than hand tight and lightly “snugged” with a 10mm
wrench. DO NOT over-tighten any of these bolts.

•

The six (6) shorter 6 mm bolts secure the bridge bases to the cylinder head and the four (4)
longer 6 mm bolts secure the bridge brackets to the bridge bases.

•

There is a pair of bridge bases for the RH and LH cylinder heads. They are NOT
interchangeable.

•

The bridge brackets have alignment pins to insure they are assembled properly.

•

Always make sure the “push bolts” which pass through the bridge brackets and supply the
force to operate the compression and installer tools are always kept lubricated with engine
oil.

•

Always turn the crankshaft clockwise when instructed to reposition it.

8) Install the 2 spark plug adapters into #1 and #3 spark plug holes. Make them tight WITHOUT
using any extra tightening tools. Hand-tightening only will seal the adapters sufficiently.

IMPORTANT REMINDER: NEVER connect compressed air to any of the spark plug adapters
until instructed to do so in the procedure. See APPENDIX A on pgs. 29 and 30 for a quick
reference guide.
**STOP HERE AND REVIEW APPENDIX B BEGINNING ON PAGE 31 FOR
ADDITIONAL INFORMATION BEFORE PROCEEDING FURTHER WITH VALVE
SPRING REMOVAL/REPLACEMENT.**
9) Assemble the RH bridge bases onto the RH cylinder head and the bridge brackets to the bridge
bases.
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Bulletin Number: WTY-84R; Revised: 05/06/20

Page 21 of 42

TIP: Leave all the 6 mm bolts finger-tight until the bridge brackets are properly installed onto the
bridge bases. Once all ten (10) bolts are finger-tight, LIGHTLY snug them with a 10 mm wrench.

Bridge Bases
and Brackets
assembled on
RH cylinder
head.

Special 6 mm
Push Bolt and
their locations
on the bridge
brackets.

The valve springs will be replaced in the following order: cylinders #3 and #1 then #2 and #4.
10) Valve Spring Replacement
These steps are in the order to be followed throughout the procedure for each cylinder. Cylinders #1
and #3 will be the primarily referenced cylinders for this section.
A. Rotate the crankshaft clockwise until #1 piston is at TDC. Mark the crankshaft pulley as shown
for reference. This will make locating TDC for each cylinder easier. TDC of #1 and #2 cylinders
are 180 degrees opposite of #3 and #4.

B. Confirm all four rockers on #1 cylinder are “relaxed” or “free”.
C. Insert compression tool 2.0/2.5 IN-A (WHITE paint mark) into the corresponding bridge bracket
guide slot and onto the retainers and keepers for #1 cylinder’s INTAKE valves.

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Bulletin Number: WTY-84R; Revised: 05/06/20

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TIP: Use a “stick magnet” to help with removing and reinstalling the rockers, retainers and keepers.
D. After confirming the pilot end of the push bolt is inserted into the receiver hole in the top of the
compression tool and the bottom of the tool is properly seated squarely on the spring retainers,
CAREFULLY tighten the push bolt to compress the pair of complete intake “valve assemblies”
(the compressor tool pushes on both the retainers AND their keepers) only as much as needed
to allow removal of one (1) pair of intake rockers and adjusting shims. Tightening the push bolt
until it bottoms out on the bridge bracket is NOT required.
IMPORTANT: If the push bolt ever tightens before the tool function is complete, STOP
IMMEDIATELY and investigate the cause before damaging the tool and / or any valve train
components.
REMINDER: Always record the positions of every rocker arm and valve shim as each is removed
to insure they get reinstalled back into their original locations. The use of a closeable partitioned tray
as shown below or an equivalent organizer is STRONGLY recommended to keep valve train parts
organized.

E. Loosen the push bolt and remove the compression tool.
F. Insert compression tool 2.0/2.5 EX-A (GREEN paint mark) into the corresponding bridge
bracket guide slot and onto the retainers and keepers for #1 cylinder’s EXHAUST valves.
G. After confirming the pilot end of the push bolt is inserted into the receiver hole in the top of the
compression tool and the bottom of the tool is properly seated squarely on the spring retainers,
CAREFULLY tighten the push bolt only as much as needed to compress the pair of complete
exhaust “valve assemblies” and remove the intake rockers and adjusting shims in the same
manner.
H. Loosen the push bolt and remove the compression tool.
I. Rotate the crankshaft clockwise 180 degrees to bring #3 piston to TDC.
J. Repeat steps B through H to remove the rockers and shims on #3 cylinder.
REMINDER: Never replace valve springs on a cylinder that is not at top dead center (TDC).
If the retainer were removed and the valve to drop, the piston will keep it from falling into the
cylinder. If the piston were at bottom dead center (BDC), the valve could drop through the
guide and into the cylinder necessitating cylinder head removal.
•

At this point, the INTAKE valve springs on #3 cylinder will be replaced.

K. With shop air supply connected and the regulator set to 0.5MPa, connect one of the air hoses to
the spark plug adapter in #1 cylinder. SLOWLY (5 seconds from closed to open), open the shutoff valve. A slight amount of air leakage is normal.
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Bulletin Number: WTY-84R; Revised: 05/06/20

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L. Connect the other air hose to #3 cylinder’s spark plug
adapter.
M. Insert compression tool 2.0/2.5 IN-B (WHITE paint
mark) into the corresponding bridge bracket guide
slot and onto the retainers for #3 cylinder’s INTAKE
valves. As shown below, the opening on these spring
compression tools is wider than the compression tools
used previously. This allows room for the keepers to
come loose from the valve stem when the spring is
compressed.

N. Tighten the push bolt only as much as needed then use a magnet to remove the keepers and put
them in the organizer with the corresponding rockers and shims.

O. Loosen the push bolt and remove the compression tool.
P. Remove the retainers and original valve springs using a magnet.

NOTE: Before installing the new valve springs, although engine oil usually keeps them in position,
always confirm the steel spring seats remain in place against the aluminum cylinder head.
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Bulletin Number: WTY-84R; Revised: 05/06/20

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Q. Set #3 cylinder’s pair of INTAKE valve springs in place on the cylinder head with the blue
painted end up (toward the retainer).
R. Assemble the pair of INTAKE keepers and corresponding retainers onto the installer tool 2.0/2.5
IN-C (WHITE paint mark). Both installer tools utilize magnets to keep the retainers and
keepers in position. Use the photos below as a guide for proper component assembly onto the
installer tool.

OK

NG

Both keepers are protruding
the same amount from the
bottom of the retainer.

INTAKE Installer
Tool: 20/25 IN-C

NOTE: When the retainers and keepers are properly assembled (or “loaded”) on the installer tool,
the keepers will be drawn upward into the tool by the tool’s magnets as shown in the photo below,
right. This is normal. OK and NG reference photos of the components loaded on the installer tool
are provided below.

OK

Keepers are
centered.

NG
Keepers are either
mis-aligned or, one
is upside-down.

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Bulletin Number: WTY-84R; Revised: 05/06/20

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S. Set the loaded valve spring installer tool into the guide slot on the bridge bracket and down onto
the #3 cylinder INTAKE valve springs. Finger-tighten the push bolt to remove all free-play.
Make a final check to confirm the tool is properly positioned on the new pair of valve springs
then SLOWLY start to tighten the push bolt only as much as needed to install the retainers and
keepers.
CAUTION: If air pressure begins to leak from the cylinder (past the valve seat into the intake or
exhaust ports) when starting to tighten the push bolt, it means the installer tool is not positioned
properly (not centered) and the intake valves are starting to be pushed open. Loosen the push bolt
and re-confirm the retainers and keepers are still in their proper positions and the loaded tool is also in
the proper position on the valve springs. SLOWLY re-tighten the push bolt only as much as needed
to install the retainers and keepers.

Confirm the springs are properly
positioned and centered on the installer.

T. Loosen the push bolt and remove the installer tool. CAREFULLY inspect both springs for
successful, properly seated retainers and keepers. Use the reference photos below as a guide for
confirmation.

NG

OK

SUCCESS!

NG- 1 Keeper
is upside-down.

NG

NG- 1 Keeper is not
seated in the valve
stem groove.

NG

NG- 1 Keeper is
missing.

EXTREMELY CRITICAL: If any of the NG conditions shown above exist, use the applicable
spring compressor tool to remove the pair of retainers and keepers then return to Step R above and
start over. If installation is successful, proceed to install the EXHAUST springs.
U. Insert compression tool 2.0/2.5 EX-B (GREEN paint mark) into the corresponding bridge bracket
guide slot and onto the retainers for #3 cylinder’s EXHAUST valves. Tighten the push bolt only
as much as needed then use a magnet to remove the keepers and put them in the organizer with
the corresponding rockers and shims. Loosen the push bolt and remove the compression tool.
Remove the retainers and original valve springs using a magnet.
V. Set #3 cylinder’s pair of EXHAUST valve springs in place on the cylinder head with the blue
painted end up (toward the retainers).
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Bulletin Number: WTY-84R; Revised: 05/06/20

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W. Assemble the pair of EXHAUST keepers and corresponding retainers onto the installer tool
2.0/2.5 EX-C (GREEN paint mark) as shown below and in Step S above. Both installer tools
utilize magnets to keep the retainers and keepers in position. Although the exhaust spring installer
looks somewhat different than the intake tool, they function the same way but they are NOT
interchangeable.
EXHAUST
Installer
Tool:
20/25 EX-C

Confirm the springs are properly
positioned and centered on the installer.

X. Loosen the push bolt and remove the installer tool. CAREFULLY inspect both springs for
successful, properly seated retainers and keepers. Use the reference photos in Step T above as
a guide for confirmation. If any of the NG conditions shown in Step T exist, use the applicable
spring compressor tool to remove the pair of retainers and keepers then return to Step W above
and start over. If installation is successful, proceed to Step Y below.
Y. Close the air valve and remove both air hoses from the spark plug adapters.
Z. Rotate the crankshaft clockwise 540 degrees (1.5 rotations) and set #1 piston back to TDC.
AA. With shop air supply connected and the regulator set to 0.5MPa, connect one of the air hoses to
the spark plug adapter in #3 cylinder. SLOWLY (5 seconds from closed to open), open the
shut-off valve. A slight amount of air leakage is normal.
BB. Connect the other air hose to #1 cylinder’s spark plug adapter.
CC. Replace the valve springs on #1 cylinder following steps M to Y as outlined above.
DD. Close the air valve and remove both air hoses from the spark plug adapters.
EE. Reinstall the INTAKE rockers and shims back to #1 cylinder. Insert compression tool 2.0/2.5
IN-A (WHITE paint mark) into the corresponding bridge bracket guide slot and onto the
retainers and keepers.
VERY IMPORTANT: During reassembly, always make sure the corresponding shim and
rocker are reinstalled onto the valve they were removed from originally to avoid unnecessary
valve clearance adjustments.
FF. Reinstall the EXHAUST rockers and shims back to #1 cylinder. Insert compression tool
2.0/2.5 EX-A (GREEN paint mark) into the corresponding bridge bracket guide slot and onto
the retainers and keepers.
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Bulletin Number: WTY-84R; Revised: 05/06/20

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GG. Rotate the crankshaft clockwise 180 degrees to bring #3 piston back to TDC.
HH. Install #3 cylinder’s shims and rockers following the procedures in steps FF and GG above.
II.

Remove the bridge brackets, bridge bases and spark plug adapters from the cylinder head.

JJ.

Rotate the engine so the RH (cylinders #2 and #4) side face upward (crankcase seam
horizontal).

KK. Replace the valve springs on cylinders #2 and #4 following the same procedures as outlined
above.
NOTE: See “APPENDIX A” provided below for an overview of the FB Engine valve spring
replacement procedures.
LL. When complete, recheck the valve clearance measurements to confirm all are within
specifications provided in Step 7 above. If adjustment is necessary, use the applicable tools
while following the procedures supplied in this bulletin to remove the affected rockers and
shims.
MM. After removing any remaining old sealer, reinstall the valve covers using new gaskets supplied
in the Parts Kit following the procedures in the applicable Service Manual along with the spark
plugs and ignition coils. Finish reassembly of any remaining components in reverse order of
removal.
REMINDER: ALWAYS use the new o-rings included in the Parts Kit when reinstalling the A/C lines
back onto the compressor.
11) CAREFULLY remove the engine from the stand and re-install following the existing procedures
in the applicable Service Manual.

CALIFORNIA “VEHICLE EMISSION RECALL - PROOF OF CORRECTION”
CERTIFICATE
The California Air Resources Board and the Department of Motor Vehicles Registration/Recall
Program requires that all emission related Recall/Campaign or Service Program repairs be completed
before a vehicle registration is renewed. Please provide owners of vehicles registered in the state of
California a completed “Vehicle Emission Recall - Proof of Correction” certificate. Vehicle owners
should be advised to retain this certificate because the California Department of Motor Vehicles may
require they provide proof this service program repair has been completed.
Additional certificates are available through normal parts ordering channels using part number
MSA6P1301. Quantity 1 = 1 booklet of 50 certificates.

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Bulletin Number: WTY-84R; Revised: 05/06/20

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SERVICE PROGRAM IDENTIFICATION LABEL:
Type or print the necessary information on a Campaign Identification Label.
The completed label
should be attached to the vehicle’s upper radiator support.

WTY-84

Additional labels are available through normal parts ordering channels. The
part number is
MSA6P1302, which comes as one sheet of 20 labels.

Part Number

Applicability

Description

Order Quantity

MSA6P1302

All Models

Campaign Completion Labels (contains one sheet of 20 labels)

1

CLAIM REIMBURSEMENT AND ENTRY PROCEDURES:
Credit to perform this recall will be based on properly completed repair order information. Retailers
may submit claims through Subarunet.com.
Labor Description

WTY-84 VALVE SPRING
REPLACEMENT
COMPLETION OF WTY-84
IN CONJUNCTION WITH A
WARRANTABLE REPAIR REQUIRING
ENGINE ASSEMBLY REMOVAL

Labor
Operation #

Applicability
BRZ FA 2.0L

A129-314

A129-000*

Impreza / Crosstrek
FB 2.0L
ALL APPLICABLE
MODELS

Transmission
Type
6AT
6MT
CVT
5MT
ALL

Labor
Time

Recall/
Claim
Campaign
Type
Code

12.5
7.3

WTY-84

RC

1.6

*NOTE: If the engine has been removed from the vehicle for any warrantable concern in addition
to performing this WTY-84 recall campaign, submit the warranty claim using existing coding for
the repair(s) performed and on a separate line / job, use A129-000 to claim for the WTY-84 recall
portion. Contact the Claims Team with any questions regarding claim submission.

IMPORTANT REMINDERS:
•

SOA strongly discourages the printing and/or local storage of service information as previously
released information and electronic publications may be updated at any time.

•

Always check for any open recalls or campaigns anytime a vehicle is in for servicing.

•

Always refer to STIS for the latest service information before performing any repairs.

Continued...
Bulletin Number: WTY-84R; Revised: 05/06/20

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“APPENDIX A”
(For Valve Spring replacement on cylinders #1 and #3)
FB Valve Spring Replacement Procedure Chart for cylinders #1 and #3
Step Cylinder
Number Number

Tool
Number

Tool
Color

Tool Use / Function To Perform

Compressed Air
/ Regulator

1

1

Position engine to cylinder #1 TDC compression stroke.

2

1&3

Install bridges and spark plug adapters on right side of engine.

3

1

20/25 IN-A White

Remove #1 INTAKE rocker arms and shims.

Removed

4

1

20/25 EX-A Green

Remove #1 EXHAUST rocker arms and shims.

Removed

5

3

6

3