I got a 48,000 mile engine installed in my 04 350z.. check engine light came on and it threw the codes p0011 & p0021. So I took it back where they installed it and they put new cam sensors. The same day the light came back on and it threw the same codes. Everything drives fine. I've had it for about a week and till now it starts throwing white smoke out he exhaust when I floor it. The engine has a year warranty...

 

do the head gaskets have a one year warranty too?

 

Yes everything has warranty

 

I know...time to take it back to whom every warrante'd the engine and tell them the head gaskets have failed...compression & leak down test are in your future!