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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Jan 2020 Posts: 68 'Bolter | | 'Bolter Joined: Jan 2020 Posts: 68 | Does anyone know the correct thread size and pitch for the crankshaft of a 235?
Mike
| | | | | Joined: Feb 2004 Posts: 29,787 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,787 | I used to sell a drill/tap/threading kit to make a 7/16-20 bolt go into a stovebolt crankshaft, the same as the one used on later model small block V8's. There was no bolt at all on any stovebolt sixes from the factory. They were all press fit only on the balancers. The center bolt and heavy flat washer for a SBC is usually available at a local parts store's "help" section, and those are 7/16-20.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Jan 2020 Posts: 68 'Bolter | | 'Bolter Joined: Jan 2020 Posts: 68 | Jerry, thanks, mine has a hole in the center, maybe added later. The threads are stripped out and I am trying to find the correct tap, it looks larger than a 7/16. Do you know the best way to install the harmonic balancer without using the hole to anchor to?
Mike
Mike
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