Ok everyone
I've got a 2004 lly... I just installed a new water pump onto truck bout 2 months ago along with new thermostats. Well it's been going on now for bout a month now that it will spit coolant out over flow and hold pressure on system for days. I have also been smelin coolant lately also but can pressure test and can't find any leaks..... Ive been reading some stuff and I got a bad feeling that the hd gaskets are gone but it's never gone above 210. Some one said it could be the egr. Hope yawl can help

---AutoMerged DoublePost---

Could a bad rad cap make it hold pressure for a period of time like that?

 

have you tried pressure testing it with it running? kinda sounding like blown headgaskets

 

no ive not tried that yet... ill have to try that when i get home tonight. and if it is headgaskets the truck will be sitting for a while cause aint got the money to fix that at the moment in time....