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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: Oct 2013 Posts: 36 New Guy | | New Guy Joined: Oct 2013 Posts: 36 | Hell guys, I just picked up a nice 41 pickup with a 216. My question is about the putting the temp probe in the head. I've talked with a fellow who sent me some pics of his probe in the head but mine will fall right though the hole. His engine is a 41 and I looked up mine and it's dated 1940. Did they use a adapter when they put the probe in a 1940 head? I don't believe I can just throw a pipe reducer in there because I think the sensor has machine threads and not pipe threads on it.
Thanks for the help. | | | | | Joined: Sep 2006 Posts: 3,596 'Bolter | | 'Bolter Joined: Sep 2006 Posts: 3,596 | Tom I am not sure about the years they fit but several of the vendors like Jim Carter and Classic Parts sell this adaptor. | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | The sender reducer/adapter that Brad refers to works in later 235/261 heads that were made for an electrical sender that had a wider diameter than the mechanical/tube sender (sometime after 55-1st). Presumably, you are referring to a 1940 216 head and 1941 216/235 head? Maybe that hole changed when the 235 was introduced? That reducer might work in an earlier 216/235? It was available at NAPA - I'll look for the part number.
Last edited by tclederman; 11/09/2013 3:23 PM. Reason: added link to reducer post
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | Up to 1940 there was a factory reducer, similar to what Tim linked to, only it was slightly taller.
What year is the engine? You do not want to use a 1940 head on a 1941 or later engine. 1940 was the last year to use dome pistons. If you use a 1940 head on a 1941 or later engine you will have very low compression.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Oct 2013 Posts: 36 New Guy | | New Guy Joined: Oct 2013 Posts: 36 | I checked my serial number and the engine is a 1940. Thanks for the help everyone! | | |
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