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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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| | | | Joined: May 2011 Posts: 187 'Bolter | | 'Bolter Joined: May 2011 Posts: 187 | Have a 1954 235ci Chevy engine. Having trouble threading in the temp. sensor into the head. Does anyone know the thread size used there, is it possibly a pipe thread size. Last year at this time I had the sensor out, but it seam to screw in fine then but won't now. Thought I would try and run a tap in the hole, but unsure of the size. Any help appreciated!
Thanks, Tom | | | | | Joined: May 2015 Posts: 11,002 Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums | | Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 11,002 | Should be a straight thread with a tapered seat on the bottom. That's assuming it's the same as a 216ci, which it should be. I could go measure it for you on my engine sitting in the garage.
[on edit] can't get a good measurement on the port in the head, but tomorrow, I'll measure the sensor thread. It's definitely a straight thread.
Last edited by klhansen; 05/12/2026 6:00 AM. Reason: added info
Kevin 1951 Chevy 3100 work truckFollow this saga in Project JournalPhotos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together. | | | | | Joined: May 2011 Posts: 187 'Bolter | | 'Bolter Joined: May 2011 Posts: 187 | Thanks Kevin, I think I may have found the thread size, 5/8 x 18, and yes a straight thread. That size was last used in the 1955 235 motor. If you have a chance, please verify the size (and my information).
Tom | | | | | Joined: May 2015 Posts: 11,002 Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums | | Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 11,002 | Confirmed at 5/8 inch, 18 TPI.
Kevin 1951 Chevy 3100 work truckFollow this saga in Project JournalPhotos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together. | | |
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