this issue just came to my attention, do you think something along the lines of zerex g-05 would be an acceptable solution?
TECHNICAL SERVICE BULLETIN
3.5/3.7L - Lack Of Heat Or Uneven Heat From Front Vents
18-2172
18 June 2018
Model:
Ford
2015-2018 Transit
Issue: Some 2015-2018 Transit vehicles equipped with a 3.5L or 3.7L engine may exhibit a lack of heat or uneven
heat from side to side. This condition may be due to deposits from the engine coolant trapped in the heater core.
Action: Follow the Service Procedure steps to correct the condition.
Parts
Part Number Description Quantity
VC-1 Motorcraft® Premium Cooling System Flush 1
YN-12-D Motorcraft® PAG Refrigerant Compressor Oil 1
BR3Z-8255-A Thermostat O-Ring Seal 1
6103599 Left A-Pillar Trim Panel - Refer To The Parts Catalogue For The VIN Specific
Application
1
CK4Z-18476-A Heater Core 1
6E5Z-19B596-
A A/C Evaporator O-Ring Kit 1
FPS-8262 Authorized Modification Label 1
Obtain Locally Prestone® Cor-Guard™ Coolant 1
Obtain Locally Distilled Water 1
Warranty Status: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage Warranty/ESP coverage
limits/policies/prior approvals are not altered by a TSB. Warranty/ESP coverage limits are determined by the
identified causal part and verified using the OASIS part coverage tool.
Labor Times
Description Operation
No. Time
2015-2018 Transit 3.5L/3.7L: Diagnose And Flush The Cooling System Includes Time To
Replace The Heater Core (Do Not Use With Any Other Labor Operations)
182172A 9.3
Hrs.
Repair/Claim Coding
Causal Part: 18472
Condition Code: 49
Drive Tool Name
1/4" Power Tool
1/4" Ratchet
1/4" Long Handle Ratchet
1/4" Torque Wrench
1/4" 6" Extension
Drive Tool Name
1/4" 8" Extension
1/4" Universal Joint
1/4" 10 mm Deep Socket
1/4" Torx® T20
1/4" Torx® T27
1/4" 7 mm Socket
1/4" 8 mm Socket
1/4" 10 mm Socket
1/4" 13 mm Socket
3/8" Ratchet
3/8" Torque Wrench
3/8" 6" Extension
3/8" 10" Extension
3/8" 13 mm Deep Socket
3/8" 15 mm Deep Socket
3/8" 19 mm Deep Socket
3/8" 13 mm Socket
3/8" 15 mm Socket
3/8" Hex #4
3/8" Torx® T40
3/8" 13 mm Crows Foot
3/8" 19 mm Crows Foot
3/8" 13 mm Swivel Socket
Medium Flathead Screwdriver
Pocket Flathead Screwdriver
19 mm Wrench
13 mm Flex Head Ratchet Wrench
10 mm Flex Head Ratchet Wrench
Plastic Trim Tool
Metal Trim Tool
Hose Pinch-Off Pliers, 2 Pair
Service Procedure
1. Run the engine until it reaches normal operating temperature. Does the vehicle exhibit a lack of heat or uneven
heat from the vents in the instrument panel?
(1). Yes - proceed to Step 2.
(2). No - this article does not apply. Refer to Workshop Manual (WSM), Section 412-00.
2. Select the floor position on the control assembly. Set the temperature control to full warm and the fan speed to
medium setting.
3. Increase the engine speed to 3,500 revolutions per minute (RPM). After 30 seconds, allow the engine to return to
idle for an additional 30 seconds.
4. Using a suitable temperature measuring device, check the heater core inlet hose temperature. Is the heater core
inlet hose above 66°C (150°F)?
(1). Yes - proceed to Step 5.
(2). No - this article does not apply. Refer to WSM, Section 412-00.
5. Measure the heater core inlet and outlet hose temperature. Are the hose temperatures within 6-17°C (10-30°F)?
(1). Yes - this article does not apply. Refer to WSM, Section 412-00.
(2). No - proceed to Step 6.
6. Drain the engine coolant. Refer to WSM, Section 303-03.
7. Remove the coolant hoses from the transmission fluid cooler. Refer to WSM, Section 307-02.
8. Remove the thermostat. Refer to WSM, Section 303-03.
9. Disconnect lower radiator hose.
10. Using a garden hose, run water through inlet and outlet radiator hoses for 2 minutes each.
11. Reassemble the thermostat housing without the thermostat installed. Do not reconnect radiator hoses to the
housing at this time.
12. Using a garden hose, run water in the degas bottle for 2 minutes.
13. Close the radiator drain valve.
14. Reattach the coolant hoses to the transmission fluid cooler.
15. Disconnect the inlet and outlet heater hoses from heater core. Refer to WSM, Section 412-00.
16. Using a garden hose, run water through inlet and outlet heater hoses back toward the engine for 5 minutes each.
17. Reattach all hoses except for inlet and outlet heater hoses.
18. Using pinch pliers, clamp off inlet and outlet heater hoses.
19. Add 1 bottle of Motorcraft® Premium Cooling System Flush and fill the rest of the cooling system with water.
20. Connect the appropriate Ford scan tool to the vehicle and start the engine.
21. Allow the engine to reach normal operating temperature.
22. Run the engine at 2500 RPM for 15 minutes with the climate control system off.
23. Return the engine to idle. Using the Ford scan tool, command the cooling fans on high speed for 5 minutes.
24. Turn the engine off and open the degas bottle cap.
(1). Caution: Water may be hot. Refer to WSM, Section 303-03.
25. Drain the cooling system. Refer to WSM, Section 303-03.
26. Remove the coolant hoses from the transmission fluid cooler.
27. Using a garden hose, run water through the degas bottle at the cap opening for 2 minutes.
28. Close the radiator drain valve.
29. Reattach the coolant hoses to the transmission fluid cooler.
30. Fill the cooling system with water. Refer to WSM, Section 303-03.
31. Repeat Steps 20 through 27.
32. Remove the pinch pliers from the inlet and outlet heater core hoses and backflush toward the engine with a
garden hose for 1 minute each.
33. Using a garden hose, flush the transmission fluid cooler coolant inlet and outlet with water for 1 minute each.
34. Using a garden hose, run water through the degas bottle at the cap opening for 2 minutes.
35. If equipped, disconnect the coolant hoses from the engine oil cooler and flush the inlet and outlet ports of the
cooler with water for 1 minute each. Reconnect the hoses. Refer to WSM, Section 303-01.
36. Remove the plug from the left side of the engine block to aid with cooling system drainage. (Figure 1)
Figure 1
37. Reinstall the block plug and close the radiator drain.
38. Install the thermostat. Refer to WSM, Section 303-03.
39. Reconnect the coolant hoses to the transmission fluid cooler.
40. If equipped, disconnect and backflush all rear heater components and hoses with a garden hose for 2 minutes.
41. Replace the heater core. Clean the heater core inlet and outlet metal tubes with hot water until free of deposits.
Refer to WSM, Section 412-00.
42. Fill the cooling system. Refer to WSM, Section 303-03 to determine correct coolant concentration based on the
climate.
43. Fill out FPS-8262 Authorized Modification Label with the following text: "Use Only Prestone® Cor-Guard™
Coolant"
44. Clean the coolant reservoir surface with isopropyl alcohol and apply the FPS-8262 Authorized Modification Label.
(1). Note: Advise the owner or driver that the unit will be using a different Prestone® Cor-Guard™ coolant for the
environmental conditions. Also, highlight the technician comments describing the coolant used on the customer's
copy of the repair order.
© 2018 Ford Motor Company
All rights reserved.
NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and
equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information
that could assist in proper vehicle service. The procedures should not be performed by "do-it-yourselfers". Do not assume that a condition
described affects your car or truck. Contact a Ford or Lincoln dealership to determine whether the Bulletin applies to your vehicle. Warranty Policy
and Extended Service Plan documentation determine Warranty and/or Extended Service Plan coverage unless stated otherwise in the TSB article.
The information in this Technical Service Bulletin (TSB) was current at the time of printing. Ford Motor Company reserves the right to supersede
this information with updates. The most recent information is available through Ford Motor Company's on-line technical resources.
TECHNICAL SERVICE BULLETIN
3.5/3.7L - Lack Of Heat Or Uneven Heat From Front Vents
18-2172
18 June 2018
Model:
Ford
2015-2018 Transit
Issue: Some 2015-2018 Transit vehicles equipped with a 3.5L or 3.7L engine may exhibit a lack of heat or uneven
heat from side to side. This condition may be due to deposits from the engine coolant trapped in the heater core.
Action: Follow the Service Procedure steps to correct the condition.
Parts
Part Number Description Quantity
VC-1 Motorcraft® Premium Cooling System Flush 1
YN-12-D Motorcraft® PAG Refrigerant Compressor Oil 1
BR3Z-8255-A Thermostat O-Ring Seal 1
6103599 Left A-Pillar Trim Panel - Refer To The Parts Catalogue For The VIN Specific
Application
1
CK4Z-18476-A Heater Core 1
6E5Z-19B596-
A A/C Evaporator O-Ring Kit 1
FPS-8262 Authorized Modification Label 1
Obtain Locally Prestone® Cor-Guard™ Coolant 1
Obtain Locally Distilled Water 1
Warranty Status: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage Warranty/ESP coverage
limits/policies/prior approvals are not altered by a TSB. Warranty/ESP coverage limits are determined by the
identified causal part and verified using the OASIS part coverage tool.
Labor Times
Description Operation
No. Time
2015-2018 Transit 3.5L/3.7L: Diagnose And Flush The Cooling System Includes Time To
Replace The Heater Core (Do Not Use With Any Other Labor Operations)
182172A 9.3
Hrs.
Repair/Claim Coding
Causal Part: 18472
Condition Code: 49
Drive Tool Name
1/4" Power Tool
1/4" Ratchet
1/4" Long Handle Ratchet
1/4" Torque Wrench
1/4" 6" Extension
Drive Tool Name
1/4" 8" Extension
1/4" Universal Joint
1/4" 10 mm Deep Socket
1/4" Torx® T20
1/4" Torx® T27
1/4" 7 mm Socket
1/4" 8 mm Socket
1/4" 10 mm Socket
1/4" 13 mm Socket
3/8" Ratchet
3/8" Torque Wrench
3/8" 6" Extension
3/8" 10" Extension
3/8" 13 mm Deep Socket
3/8" 15 mm Deep Socket
3/8" 19 mm Deep Socket
3/8" 13 mm Socket
3/8" 15 mm Socket
3/8" Hex #4
3/8" Torx® T40
3/8" 13 mm Crows Foot
3/8" 19 mm Crows Foot
3/8" 13 mm Swivel Socket
Medium Flathead Screwdriver
Pocket Flathead Screwdriver
19 mm Wrench
13 mm Flex Head Ratchet Wrench
10 mm Flex Head Ratchet Wrench
Plastic Trim Tool
Metal Trim Tool
Hose Pinch-Off Pliers, 2 Pair
Service Procedure
1. Run the engine until it reaches normal operating temperature. Does the vehicle exhibit a lack of heat or uneven
heat from the vents in the instrument panel?
(1). Yes - proceed to Step 2.
(2). No - this article does not apply. Refer to Workshop Manual (WSM), Section 412-00.
2. Select the floor position on the control assembly. Set the temperature control to full warm and the fan speed to
medium setting.
3. Increase the engine speed to 3,500 revolutions per minute (RPM). After 30 seconds, allow the engine to return to
idle for an additional 30 seconds.
4. Using a suitable temperature measuring device, check the heater core inlet hose temperature. Is the heater core
inlet hose above 66°C (150°F)?
(1). Yes - proceed to Step 5.
(2). No - this article does not apply. Refer to WSM, Section 412-00.
5. Measure the heater core inlet and outlet hose temperature. Are the hose temperatures within 6-17°C (10-30°F)?
(1). Yes - this article does not apply. Refer to WSM, Section 412-00.
(2). No - proceed to Step 6.
6. Drain the engine coolant. Refer to WSM, Section 303-03.
7. Remove the coolant hoses from the transmission fluid cooler. Refer to WSM, Section 307-02.
8. Remove the thermostat. Refer to WSM, Section 303-03.
9. Disconnect lower radiator hose.
10. Using a garden hose, run water through inlet and outlet radiator hoses for 2 minutes each.
11. Reassemble the thermostat housing without the thermostat installed. Do not reconnect radiator hoses to the
housing at this time.
12. Using a garden hose, run water in the degas bottle for 2 minutes.
13. Close the radiator drain valve.
14. Reattach the coolant hoses to the transmission fluid cooler.
15. Disconnect the inlet and outlet heater hoses from heater core. Refer to WSM, Section 412-00.
16. Using a garden hose, run water through inlet and outlet heater hoses back toward the engine for 5 minutes each.
17. Reattach all hoses except for inlet and outlet heater hoses.
18. Using pinch pliers, clamp off inlet and outlet heater hoses.
19. Add 1 bottle of Motorcraft® Premium Cooling System Flush and fill the rest of the cooling system with water.
20. Connect the appropriate Ford scan tool to the vehicle and start the engine.
21. Allow the engine to reach normal operating temperature.
22. Run the engine at 2500 RPM for 15 minutes with the climate control system off.
23. Return the engine to idle. Using the Ford scan tool, command the cooling fans on high speed for 5 minutes.
24. Turn the engine off and open the degas bottle cap.
(1). Caution: Water may be hot. Refer to WSM, Section 303-03.
25. Drain the cooling system. Refer to WSM, Section 303-03.
26. Remove the coolant hoses from the transmission fluid cooler.
27. Using a garden hose, run water through the degas bottle at the cap opening for 2 minutes.
28. Close the radiator drain valve.
29. Reattach the coolant hoses to the transmission fluid cooler.
30. Fill the cooling system with water. Refer to WSM, Section 303-03.
31. Repeat Steps 20 through 27.
32. Remove the pinch pliers from the inlet and outlet heater core hoses and backflush toward the engine with a
garden hose for 1 minute each.
33. Using a garden hose, flush the transmission fluid cooler coolant inlet and outlet with water for 1 minute each.
34. Using a garden hose, run water through the degas bottle at the cap opening for 2 minutes.
35. If equipped, disconnect the coolant hoses from the engine oil cooler and flush the inlet and outlet ports of the
cooler with water for 1 minute each. Reconnect the hoses. Refer to WSM, Section 303-01.
36. Remove the plug from the left side of the engine block to aid with cooling system drainage. (Figure 1)
Figure 1
37. Reinstall the block plug and close the radiator drain.
38. Install the thermostat. Refer to WSM, Section 303-03.
39. Reconnect the coolant hoses to the transmission fluid cooler.
40. If equipped, disconnect and backflush all rear heater components and hoses with a garden hose for 2 minutes.
41. Replace the heater core. Clean the heater core inlet and outlet metal tubes with hot water until free of deposits.
Refer to WSM, Section 412-00.
42. Fill the cooling system. Refer to WSM, Section 303-03 to determine correct coolant concentration based on the
climate.
43. Fill out FPS-8262 Authorized Modification Label with the following text: "Use Only Prestone® Cor-Guard™
Coolant"
44. Clean the coolant reservoir surface with isopropyl alcohol and apply the FPS-8262 Authorized Modification Label.
(1). Note: Advise the owner or driver that the unit will be using a different Prestone® Cor-Guard™ coolant for the
environmental conditions. Also, highlight the technician comments describing the coolant used on the customer's
copy of the repair order.
© 2018 Ford Motor Company
All rights reserved.
NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and
equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information
that could assist in proper vehicle service. The procedures should not be performed by "do-it-yourselfers". Do not assume that a condition
described affects your car or truck. Contact a Ford or Lincoln dealership to determine whether the Bulletin applies to your vehicle. Warranty Policy
and Extended Service Plan documentation determine Warranty and/or Extended Service Plan coverage unless stated otherwise in the TSB article.
The information in this Technical Service Bulletin (TSB) was current at the time of printing. Ford Motor Company reserves the right to supersede
this information with updates. The most recent information is available through Ford Motor Company's on-line technical resources.
