Re: Head nut/stud torque?

Posted by HH56 On 2022/11/25 16:01:00
Was any milling done to the head and was it and the studs and the washers under the nuts the same ones or at least the same thickness as the originals? Conceivably for something like that to happen the nuts could be bottoming out on the stud threads before touching or at least tightening against the head.

Also, if the head is different or any milling was done that thinned the head there could be an issue with valve clearance. Be sure to run a check before tightening the head and cranking the engine or valves or lifters could be damaged. If a 54 engine with aluminum head, when changing from an aluminum to cast iron head there is quite a bit of difference in thickness. Unless you check to be sure the studs have enough thread or change to shorter ones extra thick or multiple washers will probably be needed.

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