Problem : Some Ford : 2008-2010 F-Super Duty vehicles build on or before 9/14/2009 and equipped with a 6.4L diesel engine might exhibit repeat radiator leaks because of malfunctioning (hyper-extended) high temperature thermostats.
Repeat Radiator Leaks Service Procedure :
1. Confirm the coolant leak is from the radiator, seek advice from pinpoint take a look at (PPT) A discovered in the Workshop Handbook (WSM)
2. Confirm the venturi tee is installed.
a. If put in, verify it’s installed correctly (word – orientation direction on part).
b. If not put in, set up Venturi Tee Kit on vehicles constructed on or earlier than 5/15/2008.
3. Prepare the vehicle for a test drive.
a. If the coolant leak on the radiator is massive sufficient to cause an unsafe check drive or potential for engine/vehicle injury, proceed to Step 5.
b. Before driving the car confirm the coolant level is at minimal degree or above in the degas bottle. If required, add 50/50 combine to coolant bottle.
4. Check Drive – use an Built-in Diagnostic System (IDS) or equivalent and monitor Engine Oil Temperature (EOT) and Engine Coolant Temperature (ECT) Parameter Identifiers (PIDS).
a. With EOT at 195 °F (ninety one °C) drive on the freeway unloaded at 55-70 MPH (89-113Km/h) fixed speed to look at EOT and ECT temp.
b. Take a look at results/next steps: (1) If EOT is less than 8 °F (4.4 °C) higher than ECT, and the coolant temp fluctuates roughly 5 °F (2.7 °C) – the thermostats are okay and do not must be replaced. Substitute simply the radiator. (2) If EOT exceeds ECT by larger than eight °F (4.4 °C) or if the ECT readings fluctuate 10 to 12 °F (5.55-6.66 °C) roughly each 30 seconds – replace both thermostats and radiator.
5. If vehicle shouldn’t be drivable and the coolant leak is discovered to be from the radiator, take away and replace both thermostats and radiator.