I took my intake and exhaust off to free up the heat riser valve and address a suspected vacuum leak. I was surprised to find that the exhaust had no gasket or sealer evident at all, neither at the manifold-to-head surface nor at the intake-to-exhaust heat riser surface. Parts diagrams show the individual crush ring gaskets for the intake ports, but no gaskets for the exhaust. The new fel-pro gasket covers all ports at the head, but includes nothing for the heat riser mating surface.
How is the exhaust supposed to be sealed?
How is the exhaust supposed to be sealed?