I assume that this would be the manifold gasket that has gone.
Is there an easy way to check that this is the case or do I just get the gasket and hope it is not the manifold cracked.
How easy a job is it to replace the manifold gasket? Is it the sort of thing I could undertake myself? please tell me it's not an engine out job.

Any views and comments appreciated.
Cheers
Nik