Could replacing an exhaust manifold, cause the head gasket to blow?

What is your question?

I had my exhaust manifold replaced twice now. This second time, it worked well a couple days. Then started shaking heavily! They said I all the sudden need a new head gasket. They already checked the intake manifold gasket and it was fine. My question is, Did the replacement of the exhaust manifold lead to the failure of the Head Gasket or blow the head gasket.

How long has your 2002 Nissan Xterra had this problem?

1 week