I had never really had any smoke at startup (or running for that matter) until recently. then all of sudden at startup it would smoke (white) like crazy for a few minutes until it was warmed up. looked for stuff visibly and with an autoenginuity and found nothing. then by chance i had someone looking at it and they noticed the degas bottle looked swollen. the bottle cap wasn't relieving pressure like it was supposed to. i put a new one on for 5$ and have not had the smoke at startup since.....been 4 mornings now.

i'm hoping mine has nothing to do with the heads...i'm pretty sure i had a cracked cup alread. I guess at shut down the pressure being higher on the cooling system pushed water thru the crack....i guess the crack isn't bad enough yet for it to happen with the pressure build up?

is my logic on this right? since i only had this problem for maybe a week could i have hurt anything?

 

No one ???

 

its possible you could have but i doubt it, have you thrown any codes, truck run different or anything like that?

 

Smell your coolant...

My bet, you have a cracked cup...