Re: Head Bolts/Studs

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Posted by Steve Dabrowski on April 26, 2022 at 17:15:50 [URL] [DELETE] :

In Reply to: Head Bolts/Studs posted by Al on April 26, 2022 at 11:34:38:

My 1947 vintage 8N had (and still has) studs. I removed them and shaved the top of the block when rebuilding the engine. Then I re-installed them after carefully cleaning the studs and threads in the head using plumbing tube wire brushes in my drill. I used aircraft gasket cement on the threads and torqued the studs to 10 ft-lbs in the block (want to be careful torquing too tight as you can cause a crack in the block with the shoulder of the stud).
I read that the threads on Ford studs of the time were rolled and should not be chased using a tap or die which may cause them to leak. Using new bolts in a block originally made for studs could also cause leakage if not sealed using a good product.

When tightening I fully warmed the engine and after allowing to cool repeated torquing until all of the nuts were fully tight at the specified level, it took five cycles of this on my 8N. Have had no leakage over the past five years since the rebuild and it continues to start on the first one or two cranks.

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