Blowing white smoke when cold, and the heater is cold at low rpms... (LONG)

[travsav]

When i first start the truck, it blows white smoke out the exhaust until it warms up a bit, then it stops...

My heat blows cold, no matter how long i let it warm up... Does actually heat up when I'm driving down the road.

I installed a new thermostat, coolant system wouldn't bleed itself... so I couldn't get it to take coolant.

I took it to the dealer, they pressure tested the system, said it wasn't leaking. So they removed the thermostat, added coolant straight through the intake, reinstalled the thermostat, filled the radiator via the upper radiator hose, put it back together, and the heat was working.

They charged me $250, now 4 days later my heat is going cold again...

I hate to take it back to those crooks to do some other petty fix that doesn't work and charge me another $250...

What do you guys think?

[Newman]

What mods do you have?

[travsav]

No mods, all stock

[SD350]

what kind of truck is it

[travsav]

2007 F350 136k miles

[Fin]

Before my egr failed I had similar issues with smoke. Id pull the egr and see if it looks dry and powdery, if it looks anything moist you might be in the early stages of failure.

[SD350]

Are you sure your your waterpump is working? I think they had some issues with them on the 6.0

[Newman]

How are your oil temps in relation to your coolant temps?

[travsav]

Unfortunately I don't have gauges.

[duc796]

I have the same issue with the heat if the truck is sitting at idle then the heat blows cold. As soon as i start moving again the heat gets warm... Im pretty much stumped on this one.