Howdy,
Ford 2003 F250 with 6.0 diesel leaks anti-freeze when cold. Looks like it's coming from the back of the engine by the block. Can sit for days without being operated, and then just starts to leak. Had it into Ford and they changed the thermostat gasket. Said it was leaking. Four days later the same thing, starts to leak when cold. Took to another mechanic shop who pressure tested and no leaks. Again 4 days later starts to leak after sitting for a day and a half. It's in my driveway that has a slight incline. That's where it seems to leak. It's not an everyday leak. Drove it while it was leaking, parked it and now 4 days after being parked and not run, it starts leaking again! WTF?
Anybody have any idea about this? I'm at a loss here!