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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!
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| | | | Joined: Feb 2026 Posts: 9 'Bolter | | 'Bolter Joined: Feb 2026 Posts: 9 | Hi all,
I have a ‘54 Chevy 3100 with the original 235 that I’m putting back together several years (30+) after an out of frame rebuild. It has a coolant port mid block on the driver’s side just ahead of the throttle bell crank. It is tapped for a 5/16 course threaded bolt. Does anyone know what this port is for and why it would be tapped for standard bolt threads rather than NPT?
Thanks,
Doug | | |
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