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NHTSA ID Number: 10191520

Manufacturer Communication Number: 21B26

TSB/Document Date: 2021-05-04


Summary

Certain 2020 Model Year MustangeBay logo GT500/GT350 Equipped with a 5.2L Engine Secondary Timing Chain Tensioner In some of the affected vehicles, the engines secondary timing chain tensioner may not have been properly activated during assembly, which could result in a timing loss. Timing loss could lead to internal engine damage, a rough running engine, and engine misfires.


Description – GT500

*-6268-*

*-6731-*

© Copyright 2021 FordeBay logo Motor Company

ATTACHMENT II
Page 3 of 4
NEW VEHICLE DEMONSTRATION / DELIVERY HOLD
Customer Satisfaction Program 21B26
Certain 2020 Model Year MustangeBay logo GT500/GT350 Equipped with a 5.2L Engine
Secondary Timing Chain Tensioner
Order
Quantity

Claim
Quantity

Chain (Secondary)

2

2

*-6K254-*

Tensioner (Secondary)

2

2

*-6K297-*

Guide/Shoe (Secondary)

2

2

*-6108-*

PST RH (GT350)

4

4

*-6135-*

PIN PST (GT350)

8

8

*-6140-*

RET PST PIN (GT350)

16

16

*-6200-*

ROD ASY (GT350)

8

8

*-6148-*

Ring Pack (GT350)

8

8

*-6108-*

PST LH (GT350)

4

4

*-6731-*

Oil Filter

1

1

*-6049-*

Cylinder Head Assembly RH (GT350)

1

1

*-6049-*

Cylinder Head Assembly LH (GT350)

1

1

*-6065-*

Cylinder Head Bolt

20

20

*-6211-*

Con Rod Bearing (do not replace)

16

16

*-6564-*

Rocker Roller Finger (GT350)

32

32

*-6079-*

Gasket Set (GT350)

1

1

Part Number

Description – GT350

*-6268-*

Dealers will be notified via a DOES II communication if circumstances warrant a change in part supply
strategy and when open ordering resumes.
DEALER PRICE
For latest prices, refer to DOES II.
PARTS RETENTION, RETURN, & SCRAPPING
Follow the provisions of the Warranty and Policy Manual, Section 1 - WARRANTY PARTS
RETENTION AND RETURN POLICIES. If a replaced part receives a scrap disposition, the part must
be scrapped in accordance with all applicable local, state and federal environ mental protection and
hazardous material regulations. Federal law prohibits selling motor vehicle parts or components that
are under safety, compliance, or emissions recall.

© Copyright 2021 FordeBay logo Motor Company

ATTACHMENT II
Page 4 of 4
NEW VEHICLE DEMONSTRATION / DELIVERY HOLD
Customer Satisfaction Program 21B26
Certain 2020 Model Year MustangeBay logo GT500/GT350 Equipped with a 5.2L Engine
Secondary Timing Chain Tensioner
EXCESS STOCK RETURN
Excess stock returned for credit must have been purchased from FordeBay logo Customer Service Division in
accordance with Policy Procedure Bulletin 4000.
REPLACED FSA PARTS INSPECTION AND SIGN OFF
Effective March 1, 2021 all parts replaced as part of an FSA repair with a repair order open date of
March 1, 2021 or later must be inspected and signed off on the repair order by a member of your
dealers fixed operations management team or an employee the task has been delegated to. If the
task is to be delegated to a non-management employee, the employee needs to be someone other
than the technician who completed the repair and needs to understand the importance of completing
this task consistently and accurately.

All parts replaced as part of an FSA repair should be returned to the parts department
following the Warranty Parts Retention and Return Policies.

Inspect the replaced parts to verify the FSA repair was completed.

If the FSA repair is found to be complete, the designated employee signs the repair order line
or parts return stamp area (electronic or hand signed) for the FSA repair indicating the parts
were inspected and validated to have been replaced.

After the parts have been inspected, they should be handled based on the guidance in the
parts status report in the Online Warranty System (Hold, Return, CORE, Scrap, etc.).

This process is subject to review during warranty audits for FSA repairs with a repair order
open date of March 1, 2021 or later. Any eligible FSA claims requiring parts replacement,
found not to have been inspected and signed off during a warranty audit will be subject to
chargeback and consideration for enrollment into the Dealer Incomplete Recall Repair
Process.
Note: Other approvals (electronic or handwritten) for add-on repair lines, dealer owned vehicle
repairs, and repeat repairs do not qualify as FSA parts inspection approvals. The post repair FSA
parts inspection process (electronic or handwritten) is independent from other warranty approval
requirements. The approval by the designated employee implies that the FSA parts were found to be
replaced and must be able to be clearly identified on the Repair Order. If multiple FSA’s require
approval on a single Repair Order, each applicable occurrence will require individual post repair
approval by the designated employee.

© Copyright 2021 FordeBay logo Motor Company

ATTACHMENT III
PAGE 1 OF 5
CUSTOMER SATISFACTION PROGRAM 21B26

CERTAIN 2020 MODEL YEAR MUSTANGeBay logo GT500 AND GT350 VEHICLES EQUIPPED
WITH A 5.2L ENGINE — SECONDARY TIMING CHAIN TENSIONER
Table Of Contents

Mobile / Dealership Inspection...........................................................................1

Service Procedure...............................................................................................4

MOBILE / DEALERSHIP INSPECTION
1. Remove the oil fill cap. See Figure 1.

OIL FILL CAP

FRONT OF
VEHICLE

21062A

FIGURE 1

CPR © 2021 FORDeBay logo MOTOR COMPANY
DEARBORN, MICHIGAN 48121
04/2021

STUD FOR
MISSING NUT
STUD FOR
MISSING NUT

ATTACHMENT III
PAGE 2 OF 5
CUSTOMER SATISFACTION PROGRAM 21B26

2. Inspect the Right Hand (RH) secondary timing chain tensioner for activation. The RH secondary timing
chain tensioner is inspected through the oil fill opening using a mirror and when activated will show the
groove in the shaft of the tensioner. See Figures 2 and 3. Is the groove on the RH secondary timing
chain tensioner visible?
If YES - Install the oil fill cap. This recall does not apply to this vehicle.
If NO - Proceed to Step 3.
FRONT OF
VEHICLE

SECONDARY TIMING
CHAIN TENSIONER
21062B

FIGURE 2

GROOVE
NOT ACTIVATED

ACTIVATED

STUD FOR
MISSING NUT
21062C

FIGURE 3
CPR © 2021 FORDeBay logo MOTOR COMPANY
DEARBORN, MICHIGAN 48121
04/2021

STUD FOR
MISSING NUT
STUD FOR
MISSING NUT
PLACE COPY HERE
PLACE COPY HERE

ATTACHMENT III
PAGE 3 OF 5
CUSTOMER SATISFACTION PROGRAM 21B26

NOTE: Do not disconnect any of the coolant hoses.
3. Remove the retainers and position aside the degas bottle. See Figure 4.
FRONT OF
VEHICLE

21062F

FIGURE 4
4. Rotate the engine from the 12 o'clock position to the 8:30 position and reinspect the secondary timing
chain tensioner. See Figures 2 and 3. Is the groove on the secondary timing chain tensioner visible
after rotating the engine?
If YES - Proceed to Step 5.
If NO - For Mobile Inspection: Contact the SSSC. Vehicle will need to be towed to the dealership

for repair.

- For Dealer Inspection: Proceed to the Service Procedure on Page 4.
5. Position back the degas bottle and install the retainers. See Figure 4.
• Torque: 80 lb.in (9 Nm)
6. Install the oil fill cap. See Figure 1. This recall does not apply to this vehicle.

STUD FOR
MISSING NUT
STUD FOR
MISSING NUT
STUD FOR
MISSING NUT
PLACE COPY HERE
PLACE COPY HERE
PLACE COPY HERE

CPR © 2021 FORDeBay logo MOTOR COMPANY
DEARBORN, MICHIGAN 48121
04/2021

ATTACHMENT III
PAGE 4 OF 5
CUSTOMER SATISFACTION PROGRAM 21B26

SERVICE PROCEDURE
NOTE: Proceed with the Service Procedure only after a vehicle has failed Inspection.
1. Remove the valve covers. Please follow the Workshop Manual (WSM) procedures in Section 303-01.
2. Using the crank bolt, rotate the engine until the single blue timing link is aligned to the timing mark
on the exhaust VCT. See Figure 5.
EXHAUST
VCT

TIMING MARK

SINGLE BLUE
TIMING LINK

21062D

FIGURE 5
3. Check the timing on both the RH and LH secondary timing chain. Is the intake VCT timing mark
between the double blue timing link? See Figure 6.
If YES for BOTH sides - Proceed to Step 7.
If NO for ONE or BOTH sides - Proceed to Step 4.
DOUBLE BLUE
TIMING LINK
STUD FOR
MISSING NUT

TIMING MARK
STUD FOR
INTAKE
MISSING NUT
VCT
STUD FOR
21062E NUT
MISSING

FIGURE 6

PLACE COPY HERE
PLACE COPY HERE

CPR © 2021 FORDeBay logo MOTOR COMPANY
DEARBORN, MICHIGAN 48121
04/2021

PLACE COPY HERE

ATTACHMENT III
PAGE 5 OF 5
CUSTOMER SATISFACTION PROGRAM 21B26

4. Remove the spark plugs on the affected side(s). Please follow the WSM procedures in Section 303-07.
5. Perform a Cylinder Leakage Detection Test on the affected side(s). Please follow the WSM procedures
in Section 303-00.
Pass - Proceed to Step 7.
Does Not Pass - Proceed to Step 6.
6. Replace both the RH and LH Secondary Timing Chain Tensioner, Secondary Timing Chain Tensioner
Shoes/Guides, and the Secondary Timing Chains. On the affected side(s), replace the Pistons,
Connecting Rods, Cylinder Head. Please follow the WSM procedures in section 303-01. This completes
this recall.
7. Replace both the RH and LH Secondary Timing Chain Tensioner, Secondary Timing Chain Tensioner
Shoes/Guides, and the Secondary Timing Chains. On the affected side(s), replace the Cylinder Head.
Please follow the WSM procedures in section 303-01. This completes this recall.
IMPORTANT NOTE: Federal law prohibits selling motor vehicle parts or components that are
under safety, compliance, or emissions recall. Unless a part is requested to be returned to FordeBay logo, all
parts replaced under this FSA must be scrapped in accordance with all applicable local, state and
federal environmental protection and hazardous material regulations. Refer to the Parts Retention,
Return, & Scrapping section of the FSA dealer bulletin for further information.

CPR © 2021 FORDeBay logo MOTOR COMPANY
DEARBORN, MICHIGAN 48121
04/2021

12

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TSB/Document ID: 21B26

Replacement Service Bulletin Number:

MFR Communication Date: 2021-04-26

MFR Internal Campaign ID/Software Version:

Communication Type: Service Bulletin/Repair Instructions

NHTSA Components: ENGINE AND ENGINE COOLING

MFR Component System:

MFR Component Subsystem:


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