Washers on head bolts
More Turbo
Joined: Jan 2006
Posts: 615
Likes: 6
From: Tucson, AZ
That's one of the nice things about RectorSeal #5, it doesn't harden.
Brief read about rolled vs. machined threads.
https://www.globalfastenernews.com/w..._Threading.pdf
Brief read about rolled vs. machined threads.
https://www.globalfastenernews.com/w..._Threading.pdf
Thanks for this link. It was a good read and I saved it for later use.
Lead Driver
Joined: Oct 1999
Posts: 6,776
Likes: 553
From: Kalispell, MT
Interesting read! Thanks gentlemen for sharing your expertise. That's what makes this a great forum!
These old flatheads have survived without knowing the difference between rolled and machined threads, but I enjoyed the info.
I'm just a shade-tree mechanic but I'd only use washers on aluminum aftermarket heads. Iron heads? 11/16" head bolts like original should do fine. Grade 5 or better.
These old flatheads have survived without knowing the difference between rolled and machined threads, but I enjoyed the info.
I'm just a shade-tree mechanic but I'd only use washers on aluminum aftermarket heads. Iron heads? 11/16" head bolts like original should do fine. Grade 5 or better.
Fleet Owner
Joined: Jul 2004
Posts: 27,295
Likes: 1,056
From: NM
They have to be the correct length, some of the holes are blind holes. Hitting the bottom and torqueing could be bad.
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turnrjr
Ford Inline Six, 200, 250, 4.9L / 300
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Dec 6, 2008 08:51 PM
