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NHTSA ID Number: 10203655
Manufacturer Communication Number: TSB 21-2408
Summary
Some 2015-2019 Transit vehicles equipped with a 3.7L engine and block heater may exhibit a repeat coolant leak from a deteriorated O-ring and/or intake manifold thermostat housing. This may be due to the block heater in the thermostat housing. To correct the condition, install a block heater service kit in the engine block.
5 Affected Products
Vehicle
| MAKE | MODEL | YEAR |
FORD | TRANSIT | 2015-2019 |
Model:
2015-2019 Transit
Engine: 3.7L
Issue: Some 2015-2019 Transit vehicles equipped with a 3.7L engine and block heater may exhibit a repeat coolant leak from a deteriorated O-ring and/or intake manifold thermostat housing. This may be due to the block heater in the thermostat housing. To correct the condition, install a block heater service kit in the engine block.
Action: Follow the Service Procedure steps to correct the condition if the vehicle meets all of the following criteria:
- 2015-2019 Transit
- 3.7L engine
- Equipped with a block heater in the thermostat housing
- Coolant leak from thermostat housing
Parts
| Service Part Number | Quantity | Description |
| KK4Z-6D008-A | 1 | Block Heater Service Kit |
| VC-13DL-G | As Needed | Motorcraft® Yellow Concentrated Antifreeze/Coolant (All Markets Except Canada) |
| CVC-13DL-G | As Needed | Motorcraft® Yellow Concentrated Antifreeze/Coolant (Canada Only) |
Quantity refers to the amount of the service part number required to repair the vehicle.
As Needed indicates the amount of the part may vary and/or is not a whole number. Parts can be billed out as nonwhole numbers, including less than 1.
Parts
Parts To Inspect And Replace Only If Necessary
| Service Part Number | Quantity | Description |
| AT4Z-8527-A | If Needed | Thermostat Housing O-ring Seal |
| JL3Z-9424-B | If Needed | Lower Intake Manifold |
| BL3Z-8A586-G | If Needed | Thermostat Housing |
7T4Z-8590-A  | If Needed | O-ring Seal |
| AT4Z-9H486-A | If Needed | Upper Intake Manifold Gasket |
If Needed indicates the part is not mandatory
Service Procedure
- Remove the existing cooling system block heater and wire harness from the thermostat housing. Refer to Workshop Manual (WSM), Section 303-03A.
- Remove the thermostat housing. Refer to WSM, Section 303-03A.
- Inspect the thermostat housing, thermostat housing O-ring seal, and intake manifold tube for damage and replace as necessary. Refer to WSM, Section 303-03A.
- Install the immersion block heater and harness kit. Refer to the instruction sheet included in the kit.
- Fill and bleed the cooling system. Refer to WSM, Section 303-03A, General Procedures, Engine Cooling System Draining, Vacuum Filling and Bleeding.
SEOCONTENT-START
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TECHNICAL SERVICE BULLETIN
2015-2019 Transit – 3.7L – Block Heater – Coolant Leak From The Thermostat Housing
21-2408
18 November2021
Model:
Ford
2015-2019 Transit
Engine: 3.7L
Issue:
Some 2015-2019 Transit vehicles equipped with a 3.7L engine and block heater may exhibit a repeat coolant leak from a deteriorated O-ring and/or intake manifold thermostat housing. This may be due to the block heater in the thermostat housing. To correct the condition, install a block heater service kit in the engine block.
Action:
Follow the Service Procedure steps to correct the condition if the vehicle meets all of the following criteria:
• 2015-2019 Transit
• 3.7L engine
• Equipped with a block heater in the thermostat housing
• Coolant leak from thermostat housing
Parts
Service Part Number
Quantity
Description
KK4Z-6D008-A
1
Block Heater Service Kit
VC-13DL-G
As Needed
Motorcraft® Yellow Concentrated Antifreeze/Coolant (All Markets Except Canada)
CVC-13DL-G
AsNeeded
Motorcraft® Yellow Concentrated Antifreeze/Coolant (Canada Only)
Quantity refers to the amount of the service part number required to repair the vehicle.
As Needed indicates the amount of the part may vary and/or is not a whole number. Parts can be billed out as non-whole numbers, including less than 1.
Parts
Parts To Inspect And Replace Only If Necessary
Service Part Number
Quantity
Description
AT4Z-8527-A
If Needed
Thermostat Housing O-ring Seal
JL3Z-9424-B
If Needed
Lower Intake Manifold
BL3Z-8A586-G
If Needed
Thermostat Housing
7T4Z-8590-A
If Needed
O-ring Seal
AT4Z-9H486-A
If Needed
Upper Intake Manifold Gasket
If Needed indicates the part is not mandatory.
Warranty Status:
Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Service Part Warranty(SPW)/Special Service Part (SSP)/Extended Service Plan (ESP) coverage. Limits/policies/prior approvals are not altered by a TSB. NVLW/SPW/SSP/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool.
Labor Times
Description
Operation
Time
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No.
2015-2019 Transit 3.7L: Inspect And Install Immersion Block Heater Kit, Includes Time To Replace The Thermostat Housing And/Or Gasket As Necessary (Do Not Use With Any Other Labor Operations)
212408A
2.3Hrs.
2015-2019 Transit 3.7L: Inspect And Install Immersion Block Heater Kit, Includes Time To Replace The Thermostat Housing And/Or Gasket And Intake Manifold Tube As Necessary (Do Not Use With Any Other Labor Operations)
212408B
3.3Hrs.
Repair/Claim Coding
Causal Part:
9J447
Condition Code:
D8
Service Procedure
1.
Remove the existing cooling system block heater and wire harness from the thermostat housing. Refer to Workshop Manual (WSM), Section 303-03A.
2.
Remove the thermostat housing. Refer to WSM, Section 303-03A.
3.
Inspect the thermostat housing, thermostat housing O-ring seal, and intake manifold tube for damage and replace as necessary. Refer to WSM, Section 303-03A.
4.
Install the immersion block heater and harness kit. Refer to the instruction sheet included in the kit.
5.
Fill and bleed the cooling system. Refer to WSM, Section 303-03A, General Procedures, Engine Cooling System Draining, Vacuum Filling and Bleeding.
SEOCONTENT-END
1 Associated Document
Manufacturer Communications
21-2408
18 November 2021
MC-10203655-0001.pdf 125.692KB
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- Yellow-colored, longer-life, ethylene glycol-based antifreeze/coolant for use in gasoline and diesel engines
- Provides year-round antifreeze, anti-boil and corrosion protection
- Ready-to-use; no need to add water - the 50/50 mixture of coolant and treated (purified) water provides freeze protection down to -34°F (-37°C) and boiling protection up to 265°F (129°C)
- Do not mix different colors or types of coolant in your vehicle
- Contains a bittering agent
- Yellow-colored, longer-life, ethylene glycol-based antifreeze/coolant for use in gasoline and diesel engines
- Provides year-round antifreeze, anti-boil and corrosion protection
- 50/50 mixture of coolant and distilled water provides freeze protection down to -34°F (-37°C) and boiling protection up to 265°F (129°C)
- Do not mix different colors or types of coolant in your vehicle
- Contains a bittering agent
- Yellow-colored, longer-life, ethylene glycol-based antifreeze/coolant for use in gasoline and diesel engines
- Provides year-round antifreeze, anti-boil and corrosion protection
- A 50/50 mixture of coolant and distilled water provides freeze protection down to -34°F (-37°C) and boiling protection up to 265°F (129°C)
- Do not mix different colors or types of coolant in your vehicle
- Contains a bittering agent
- 1 GALLON ENGINE ANTIFREEZE/COOLANT: Fully compatible with other extended life antifreeze/coolants. This item contains a bittering agent called Denatonium Benzoate.
- PROTECTS: Advanced formulation prevents rust & corrosion protecting all engine cooling system components
- DESIGNED FOR NORTH AMERICAN VEHICLES: Recommended for use with Ford, Chrysler, and GM vehicles that require an orange organic acid technology formula
- GUARANTEED: When installed as part of a complete flush and fill, PEAK guarantees this coolant will provide service life protection of up to 400,000 miles or 15 years.
- 50/50 PREDILUTED FOR QUICK TOP OFFS: Already prediluted to make topping off your cooling system a breeze
- PREDILUTED ANTIFREEZE AND COOLANT: Engineered to support any vehicle's engine cooling system to enhance performance and provide protection. This item contains a bittering agent called Denatonium Benzoate.
- PROPRIETARY BLEND: Contains 10X the scale-fighting inhibitors to ensure maximum cooling performance while protecting against scale, corrosion, and other damage
- SUPERIOR CHEMISTRY: Free from 2-EHA, silicate, nitrite, borate, and amines to keep your vehicle functioning in prime condition
- UNIVERSAL FORMULA: Compatible with any color or type of existing antifreeze and coolant in your car's system
- LONG-LASTING: Offers 2X the average warranty coverage, cooling your engine system for over 10 years or 300,000 miles of service
- Unsurpassed freeze protection and anti-boil performance outperforms industry standards
- Organic acid technology resists rust, scale & corrosion while protecting all cooling system metals (including aluminum)
- High-quality additives protect against leaks and won’t harm gaskets, hoses, plastics or original vehicle finish
- Orange concentrate formula should be mixed with clean tap water or demineralized water at 50/50 ratio for temperatures -34 to 265F; 60/40 for -62 to 270F; and 70/30 for -84 to 267F
- 5 year/150,000 mile guarantee protects against engine failure caused by freeze-ups or boil-overs
- Unsurpassed freeze protection and anti-boil performance outperforms industry standards
- Hybrid organic acid technology fights rust, scale & corrosion while protecting all cooling system metals (including aluminum)
- High-quality additives protect against leaks and won’t harm gaskets, hoses, plastics or original vehicle finish
- Yellow concentrate formula should be mixed with clean tap water or demineralized water at 50/50 ratio for temperatures -34 to 265F; 60/40 for -62 to 270F; and 70/30 for -84 to 267F
- 5 year/150,000 mile guarantee protects against engine failure caused by freeze-ups or boil-overs
- Contains Alugard Plus for compatibility with all ethylene glycol-based coolants in automobiles and light duty trucks
- Fights corrosion, scaling and rust while protecting all cooling system metals (including aluminum)
- High-quality additives protect against leaks and won’t harm gaskets, hoses, plastics or original vehicle finish
- Pre-mixed yellow formula is ready-to-use in a 50/50 ratio with deionized water to protect all modern engine components from winter freezing (-34F) and summer boiling (265F).
- Contains 30 – 50 ppm of denatonium benzoate as a bittering agent
- Part number: VC5DIL
- Country of Origin: United States
- Package Weight: 4.15 kilograms
- "This product contains bittering agent"
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