Re: torque specs for the 6

Posted by Owen_Dyneto On 2020/1/11 11:34:34

Ernie, I've posted a chart like that several times and would be glad to do so again. However, considerable caution should be exercised when using it, there can be a very wide disparity between what a fastener is designed for and the claiming force that the car manufacturer desires between two surfaces. It is far better to find a similar application (manifolds, heads, bearing caps, etc.) and fastener sizing from a later but similar model engine where the car manufacturers specifications are available. In this case I'd be guided by the torque specs for the postwar 6-cylinder Packard motor.

On manifolds, it's important to keep in mind that the exhaust manifold gets much hotter than the engine block and hence expands further so the gaskets and fasteners must allow for some very small "slip" between them.