Hi , I need some severe help please. My vy ecotec engine stalls when i take the oil cap off. It has vacuum inder the oil cap. I had this problem as well as a blown head gasket. So i got reco heads and new gaskets. Its pretty easy to put back together. I have run it and its fine on all 6 cylinders but now its suckeing the guts out of the sump. Any ideas. Please help!!!!
And the intake gaskets are fine . They only go on one way. All the studs have sealant on them.