Hi. I am replacing the manifold gasket and don't know the tightening sequence, it is made of aluminum,do I need a sealer for this gasket, if so what type. The head has 2 pin's, 1 at each end, also has 6 bolts or studs. Changing the valve cover gasket and need the sequence and do I need a sealer, it is made of cork. 3 bolts on 1 side & 4 on the other. Thanks
