vehicles.
During the week of July 21, 2014, retailers located in affected “salt-belt” states will
automatically be shipped 50 self-locking nut kits. This provides enough self-locking nut kits
for the inspection of 50 vehicles. It will be necessary for retailers located outside of affected
“salt-belt” states to order self-locking nut kits as needed.
Additional quantities of the WQK-47 self-locking nut kits will be available through normal
parts ordering channels starting the week of July 28, 2014. In order to maintain an adequate part
supply, SOA requests retailers only order quantities necessary to satisfy anticipated demand.
For parts ordering and claim purposes, retailers should use the part number listed below.
PART NUMBER

42009FG000

APPLICABILITY

DESCRIPTION

Impreza, WRX,
WQK-47 Self Lock Nut Kit
STI, and Forester (contains two self-locking nuts)

QUANTITY
1

Note: SOA will only notify owners of vehicles that are currently or were previously registered
in at least one of the “salt-belt” states or the District of Columbia. In cases where the
vehicle was previously registered in a “salt-belt” state or the District of Columbia, it will be
necessary for retailers located outside of the “salt-belt” area to order materials and parts to
service those affected vehicles if they come to their Service Department for this repair.
Continued...
Bulletin Number: WQK-47R; Revised: July 29, 2014

Page 6

SERVICE PROCEDURE
This Campaign involves a close inspection of the steel brake pipes located in the fuel tank area
of the vehicle. Corrosion may develop in areas of these brake pipes not protected by a resin
cover and eventually perforate them causing brake fluid seepage. If seepage is verified during
the inspection procedures, the affected brake piping must be replaced. If no seepage is verified,
application of a protective rustproofing wax material to specific sections of the brake piping
will be required to complete this Campaign. On Legacy and Outback models, the inspection
and rustproofing procedures are all performed through the inspection cover opening on the
right-hand (passenger side) of the plastic fuel tank cover. On Impreza and Forester models, the
right-hand (passenger side) portion of the plastic fuel tank cover must be removed for access.
The following illustrations provide an overview of the affected areas.
2005-2009 Legacy and Outback

Front

2-2 Way joint connector

Center brake line

Rear brake line

Brake hose

2-2 Way joint connector

Rear brake line

Continued...
Bulletin Number: WQK-47R; Revised: July 29, 2014

Page 7

Impreza, WRX, STI, Forester
Front

2-2 Way joint connector

Center brake line

Rear brake line

Brake hose

2-2 Way joint connector

Rear brake line

Continued...
Bulletin Number: WQK-47R; Revised: July 29, 2014

Page 8

INDEX
1.
2.
3.
4.
5.
6.
7.

Required Tools (Pg.9)
Spray Gun: Assembling, Adjusting and Cleaning (Pg.9)
WQK-47 Service Procedure Flow Chart (Pg.13)
[Step 1] Brake Fluid Leakage Inspection #1: Visual Check (Pg.14)
[Step 2] Brake Fluid Leakage Inspection #2: With Brake Pedal Depressed (Pg.18)
[Step 3] Application of Rust-Proofing (Pg.21)
[Step 4] Brake Piping Replacement (Pg.27)

1. REQUIRED TOOLS AND MATERIALS
DESCRIPTION

BRAND OR TYPE

QUANTITY

Safety Goggles

—

1 pair

Particle Mask

—

1

Shop Cloths

—

As Needed

Air Compressor

—

1

Air Gun

—

1

Twin Post Lift

—

1

Screwdriver (Flat Blade)

—

1

Flashlight

—

1

Tape Measure

—

1

Toothbrush

—

1

Spray Gun

Part Description: WQK-47 Spray Gun (Part Number: SOA635134)

1

In-Line Air
Pressure Regulator

—

As Needed

Nozzle

Part Description: WQK-47 Nozzle (Part Number: SOA635135)

Anti-Rust Wax
Kerosene

1
As much as
Part Description: NOX-RUST 712AM (Part Number: SOA868V9390)
required
—
As Needed

2. SPRAY GUN: ASSEMBLING, ADJUSTING AND CLEANING
CAUTION:
•

All retailers are reminded to read the entire campaign bulletin BEFORE assembling
and operating the spray gun. Note that the spray gun utilizes a pressurized cup for
the wax.

•

The spray gun cup is not designed for pressures higher than indicated in the
campaign instructions. Most standard shop air exceeds those pressure standards.

•

Always ensure that a properly regulated air supply is connected to prevent
damage to the spray cup. If you are unsure of the pressure from your shop air supply,
an in-line regulator before the spray gun should be used. Never exceed the listed
pressures.

•

Damage to the spray gun due to use in unspecified manner will require replacement of
the entire spray gun assembly.

•

Always check the spray gun for any damage prior to use. Do not use if damaged.
Continued...

Bulletin Number: WQK-47R; Revised: July 29, 2014

Page 9

(4-1) Assembling of Spray Gun:
IMPORTANT: Be careful not to damage or deform the nozzle tip.
Air Tube

360-degree Nozzle Set

This knob
does not turn

Nozzle Tip

Discharge
knob

Air Needle

Air Vent (0.7mm in dia. x 3):
Check visually from
the back side.

Pressurizing Container:
Hexagon-shaped joint
must be screwed into
body of spray gun.

(4-2) Adjusting of Spray Gun:
A: Zero-point Setting of Discharge Knob and Air Needle

B: Adjustment of Wax Amount and Air Volume

Zero-point Setting of Discharge Knob
a) Fully close by rotating
the knob clockwise.

Discharge Knob

b) Mark the screw at
stop (zero) point.

Zero-point Mark

Discharge Knob

Opening state
from full-close:
Summer: 3/4 turn
Winter: 4 turns

Air Needle

Closing state
from full-open:
All seasons:
1 full turn

Zero-point Setting of Air Needle
a) Fully open by rotating the
needle counter-clockwise.

b) Mark the screw at
stopped (zero) point.

Compressor Air
Pressure

Air Needle

Zero-point Mark

Remarks

Summer: 51 PSI
Winter: 71 PSI
Never Exceed
71 PSI
The adjustments above are required as wax
temperatures will change between summer and winter.
Additional pressure adjustments may be needed to
achieve the required results.

Continued...
Bulletin Number: WQK-47R; Revised: July 29, 2014

Page 10

(4-3) Cleaning Procedure for Spray Gun :
The wax material (712AM) used for WQK47 is easier to maintain compared with other
common coating materials due to its extended “pot life” of 5-7 days. However, once this
wax solidifies, it is not soluble in solvent. Please clean the spray gun at the end of each day’s
work following the procedure below.
Close the discharge knob then clear the residual wax in nozzle with air pressure and wipe the
tip clean.
After operation
Residual wax visible inside nozzle

Insert nozzle into waste container and close
the discharge knob.

Pull the gun trigger half way and hold for
about 20 seconds until the tip is clear.

CAUTION: Always wear Safety Goggles
and Particle Mask whenever discharging
air through the sprayer as residual
chemicals may remain.

Confirm the nozzle and tip are clear.

Wipe the tip with a clean cloth.

IMPORTANT: The cup does not need to be cleaned if additional vehicles are scheduled
within the next few days as the wax has a pot life of 5-7 days BUT, the gun and nozzle must
be cleaned DAILY.
Continued...
Bulletin Number: WQK-47R; Revised: July 29, 2014

Page 11

Maintenance / Storage Procedure (for when the next operation is not scheduled
within 5-7 days)
In this case, clean the complete spray gun.
Clean the nozzle, tip, gun and cup using kerosene.
REMINDER: This wax product does not dissolve in thinner.
Remove the cup from
the gun.

Return the remaining wax
to the bottle.

Close the cap of the
bottle tight.

DISCARD THE WAX
IF IT SHOWS ANY
SIGNS OF STARTING
TO SOLIDIFY.

Clean the outside of
the pipe.

Remove the lid of the cup
from the gun.

Clean the mounting portion of the gun and the lid of the cup.

Remove the remaining wax
inside of the pipe.

Clean the inside of the cup.

Remove and clean the tip
of the gun.

Reassemble the spray
gun then connect the
compressed air supply.

Pour 8-10 oz. of kerosene
in to the cup.

Flush the cup and gun by
spraying the kerosene into
the waste container.

Confirm the inside of the
cup is clean.
CAUTION: Always
wear protective
Goggles and
Particle Mask
whenever air is
discharged through
the spray gun.

To prevent damage to the gun and also the loss of parts after cleaning, it is recommended to
always store the gun in its original box.
Continued...
Bulletin Number: WQK-47R; Revised: July 29, 2014

Page 12

3. WQK-47 SERVICE PROCEDURE FLOW CHART
[Step 1]
Brake Fluid Leakage Inspection #1:
Visual Check

No Brake Fluid Leakage Verified

Brake Fluid Leakage Verified

[Step 2]
Brake Fluid Leakage Inspection #2:
With Brake Pedal Depressed

No Brake Fluid Leakage Verified

[Step 3]
Application of Rust-proofing

Brake Fluid Leakage Verified

[Step 4]
Brake Piping Replacement

Complete

Continued...
Bulletin Number: WQK-47R; Revised: July 29, 2014

Page 13

4. [STEP 1] BRAKE FLUID LEAKAGE INSPECTON #1: VISUAL CHECK
FOR LEGACY AND OUTBACK VEHICLES (for Impreza and Forester vehicles, proceed to Pg.15)
IMPORTANT: Be sure to wear safety goggles and mask.
(1) Preparation: Raise the vehicle on
Fuel Tank Cover
a lift.
(2) Find the Location of Brake
Pipes (With Plastic Inspection
Cover Open)
(2-1) Confirm the location of Brake
Front
Pipe Portion A around 2-2
Way Connector by opening
inspection hole cover.
Inspection
Fuel Tank Cover
Hole Cover
(Photo 1 and A)
(2-2) Confirm the location of
Brake Pipe Portion B and C
through side gap of fuel tank
cover. (Photo B and C)
Photo 1

{

2-2 Way Connector

Photo A

Clip

Photo B

Clip

Photo C

IMPORTANT: If brake piping is covered with water, snow, etc., blow it away with
compressed air and dry completely before starting the inspection process.
(3) Dust and Dirt Removal:
(3-1) For Brake Pipe Portion A, use a tooth
brush and compressed air to remove
dust and dirt. (Photo 2)
IMPORTANT: NEVER use a metal / wire brush!
(3-2) For Brake Pipe Portion B and
C, use compressed air to remove dust
and dirt.

2-2 Way Connector

Photo 2

Be sure to carefully brush the brake piping to prevent damage.

Continued...
Bulletin Number: WQK-47R; Revised: July 29, 2014

Page 14

(4) Visual Check:

(4-1) Check for fluid leakage for Brake Pipe
Portion A. (Photo A)
2-2 Way Connector

Photo A

(4-2) Check for fluid leakage from Brake Pipe
Portion B. (Photo B)
Clip

Photo B

(4-3) Check for fluid leakage from Brake Pipe
Portion C. (Photo C)
Clip

Photo C

(5) Determination of Required Repairs (for all vehicles):
(5-1) If no brake fluid leakage is verified:
Proceed to [Step 2] “BRAKE FLUID LEAKAGE
INSPECTION #2 WITH BRAKE PEDAL DEPRESSED”.
(5-2) If brake fluid leakage is verified, Proceed to [Step 4] “BRAKE
PIPING REPLACEMENT”.
IMPORTANT: The decision to replace brake piping should be made ONLY when brake
fluid leakage is verified. Replacement of brake piping due to other reasons including surface
rust is not a matter for warranty. Questions related to any out of warranty concerns should
be directed to your DPSM.
FOR IMPREZA AND FORESTER VEHICLES
(1) Preparation:
(1-1) Raise the vehicle on a lift.
(1-2) Remove the fuel tank cover on the right (passenger) side of the vehicle.
IMPORTANT: The self-locking nuts are one-time use items and must be replaced.
Continued...
Bulletin Number: WQK-47R; Revised: July 29, 2014

Page 15

(2) Identify the Affected Brake Piping After Removing the Plastic Cover:
(2-1) Confirm the location of Brake Pipe Portion D in front of 2-2 Way Connector.
(Photo D)
(2-2) Confirm the location of Brake Pipe Portion E around 2-2 Way Connector.
(Photo E)
(2-3) Confirm the location of Brake Pipe Portion F in the rear of 2-2 Way Connector.
(Photo F)
(2-4) Confirm the location of Brake Pipe Portion G through the side gap of fuel tank.
(Photo G)

D

G
F