Technical Service Bulletins
|Publication Date: November 9, 2009|
|2008-2010 F-Super Duty|
Some 2008-2010 F-Super Duty vehicles built on or before 9/14/2009 and equipped with a 6.4L diesel engine may exhibit repeat radiator leaks due to malfunctioning (hyper-extended) high temperature thermostats.
Follow the Service Procedure steps to correct the condition.
- Verify the coolant leak is from the radiator, refer to pin point test (PPT) A found in the Workshop Manual (WSM), Section 303-03.
- Verify the venturi tee is installed.
- If installed, confirm it is installed correctly (note – orientation direction on part). Refer to applicable Field Service Action (FSA) for vehicle built on or before 5/15/2008.
- If not installed, install per applicable FSA on vehicles built on or before 5/15/2008.
- Prepare the vehicle for a test drive.
- If the coolant leak at the radiator is large enough to cause an unsafe test drive or potential for engine/vehicle damage, proceed to Step 5.
- Before driving the vehicle confirm the coolant level is at minimum level or above in the degas bottle. If required add 50/50 mix to coolant bottle.
- Test Drive – use an Integrated Diagnostic System (IDS) or equivalent and monitor engine oil temperature (EOT) and engine coolant temperature (ECT) parameter identifiers (PIDS).
- With EOT at 195 Â°F (91 Â°C) drive on the highway unloaded at 55-70 MPH (89-113 Km/h) constant speed to observe EOT and ECT temp.
- Test results/next steps:
- If EOT is less than 8 Â°F (4.4 Â°C) higher than ECT, and the coolant temp fluctuates roughly 5 Â°F (2.7 Â°C) – the thermostats are okay and do not need to be replaced. Replace just the radiator. Refer to WSM, Section 303-03 (Engine Cooling).
- If EOT exceeds ECT by greater than 8 Â°F (4.4 Â°C) or if the ECT readings fluctuate 10 to 12 Â°F (5.55-6.66 Â°C) roughly every 30 seconds – replace both thermostats and radiator. Refer to WSM, Section 303-03 (Engine Cooling).
- If vehicle is not drivable and the coolant leak is found to be from the radiator, remove and replace both thermostats and radiator. Refer to WSM, Section 303-03 for both radiator and thermostat removal procedure and approved cooling system draining, filling and bleeding procedures.
|PART NUMBER||PART NAME|
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
|092301A||2008-2010 F-Super Duty 6.4L: Pressure Test Cooling System, Road Test, Monitor PIDS, Replace The Radiator (Do Not Use With Any Other Labor Operations)||3.0 Hrs.|
|092301B||2008-2010 F-Super Duty 6.4L: Pressure Test Cooling System, Road Test, Monitor PIDS, Replace The Radiator, And Thermostats (Do Not Use With Any Other Labor Operations)||3.8 Hrs.|
|BASIC PART NO.||CONDITION CODE|