Cooling System - Radiator Leaking Coolant
TSB 11-12-412/12/11
6.4L - RADIATOR LEAKING COOLANT
FORD:
2008-2010 F-Super Duty
This article supersedes TSB 11-6-6 to update the Service Procedure and Service Labor Time Standards.
ISSUE
Some F-Super Duty vehicles equipped with a 6.4L engine may exhibit an external coolant leak from the radiator. Slow leaks at cooling system hoses/connections can lead to low coolant levels. Excessive hot and cold cycling associated with low coolant levels can cause stress within the radiator tubes, possibly resulting in cracks in the tubes.
ACTION
Follow service procedure steps to repair this concern.
SERVICE PROCEDURE
Thermostat inspection is no longer required because IDS release 71.04 and later added a cooling system monitor.
1. Inspect for the cooling system venturi tee being installed and verify proper orientation. Refer to Workshop Manual (WSM), Section 303-03, Degas Bottle - 6.4L Diesel.
2. Degas bottle port inspection and repair:
a. Dual-port design requires the degas bottle to be replaced with the single-port design and a new degas bottle cap. (Figure 1) Proceed to Step 3.
b. Single-port design requires inspection of the degas bottle cap sealing sur[ace for nicks and/or cracks. If present, replace the degas bottle and degas bottle cap. Proceed to Step 3.
3. Coolant leak inspection and repair:
a. Visually inspect all cooling system hoses/connections for evidence of coolant loss such as white coolant residue (dried coolant) or liquid coolant and repair as necessary. (Figures 2 and 3).
b. The upper and lower radiator hoses should not be removed to perform a leak inspection. White grease is used on the inside of the hose to aid in assembly and may be mistaken as a leak. A leaking radiator hose connection will be visible on the outside of the hose connection. (Figure 3)
c. If a leak is found at a radiator hose 0-ring seal, the radiator hose should be replaced. The upper and lower radiator hoses have been updated with a dual 0-ring seal design for improved sealing. The upper and lower radiator hoses should not be replaced as a pair unless both hoses have confirmed leaks.
4. Replace the radiator. Refer to WSM, Section 303-03.
a. Be sure to remove the engine coolant block plugs from both sides of the engine to drain the coolant from the engine block.
b. Fill the cooling system with a 50/50 mixture of distilled water and new Motorcraft(R) Premium Gold Engine Coolant. Do not reuse coolant that was drained from the cooling system.
c. Utilize the Rotunda Heavy Duty Airlift II radiator refiller tool (UVU5505001NT) or equivalent when filling the cooling system. Filling without use of the Heavy Duty Airlift II radiator refiller tool may leave excessive air in the system
Parts Block
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty/ESP coverage limits/policies 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.
OPERATION DESCRIPTION TIME
111204A 2008-2010 F-Super Duty 2.8 Hrs.
6.4L: Inspect The Cooling
System, Correct Or Install
Venturi Tee, Replace The
Radiator, Includes Time To
Drain And Fill The Cooling
System (Do Not Use With
Any Other Labor
Operations)
111204B 2008-2010 F-Super Duty 3.2 Hrs.
6.4L: Inspect The Cooling
System, Correct Or Install
The Venturi Tee, Replace
The Degas Bottle And Cap
If Necessary, Replace The
Radiator, Includes Time To
Drain And Fill The Cooling
System (Do Not Use With
Any Other Labor
Operations)
111204C 2008-2010 F-Super Duty 2.9 Hrs.
6.4L: Inspect The Cooling
System, Correct Or Install
Venturi Tee, Replace The
Upper And/Or Lower
Radiator Hose(s), Replace
The Radiator, Includes
Time To Drain And Fill
The Cooling System (Do
Not Use With Any Other
Labor Operations)
111204D 2008-2010 F-Super Duty 3.3 Hrs.
6.4L: Inspect The Cooling
System, Correct Or Install
The Venturi Tee, Replace
The Degas Bottle And Cap
If Necessary, Replace The
Upper And/Or Lower
Radiator Hose(s), Replace
The Radiator, Includes
Time To Drain And Fill
The Cooling System (Do
Not Use With Any Other
Labor Operations)
MT111204 For Any Additional Cooling Actual
System Repairs Use SLTS Time
Operations If Available Or
Actual Time
DEALER CODING
CONDITION
BASIC PART NO. CODE
8009 (OPERATIONS A OR B) 42
8590 (OPERATIONS C OR D) 42
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