Re: 282 exhaust manifold

Posted by HH56 On 2022/2/28 17:20:40

The intake and exhaust portions are two separate castings joined by screws at the box section under the carb to form the single manifold assembly. I don't believe it is keyed in position or has a gasket but rather just two smooth milled surfaces touch together. If all the intake runners are out of position it is possible something has jarred the manifold-- maybe it was dropped -- causing the pieces to slip at the junction. Possibly it could have been assembled incorrectly and tightened down without the use of a straight edge or being on an engine block to ensure the levels were all the same. If only one or two of the ports are out of position then it has probably warped and needs to go to a machine shop.

Usually after use the screws joining the castings become thoroughly rusted to the threaded holes or otherwise very well adhered and it may be extremely difficult to loosen or remove them without breakage. If that is the case, unless someone has been there before and has a better idea, probably the only option would be for a machine shop to see if they can disassemble or else mill all the ports to the same level. If the amount needed to get it level is a fair amount then I would be concerned that removing a lot of material could weaken or ruin the manifold.

Here is an illustration of a different manifold showing the 2 piece construction which is typical of how they were all made.

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