Re: exhaust manifold nuts 1928 526 6 cyl

Posted by Owen_Dyneto On 2014/12/26 12:31:28

I would be most surprised if it is a common split ring spring steel lock washer due to the heat of the mainifold.

I don't think there is any support for concern about the effect of heat on washers. Just browsing various parts lists between the early 30s and 1954, where lock washers are specified there is no notation of anything special about them. Exhaust manifold heat control valve hardware including wire springs, washers, etc. are just normal hardware, ditto for some automatic choke pot parts and none of them seem to deteriorate due to heat. Manifold studs have the benefit of their attachment to the engine block which is a huge heat sink at far lower temperature than the manifold itself.