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Mod | | | Forums66 Topics128,139 Posts1,056,762 Members48,454 | | Most Online14,466
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: Dec 2007 Posts: 45 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2007 Posts: 45 | After completing a swap where we replaced a 216 with a 261, we find that the mechanical temp sender does not fit the new block properly. Although the threads fit fine, there is nothing for the sender bulb to bottom against in the block, so it leaks. I am guessing that there is some sort of fitting that goes into the block first, that makes the sender fit and not leak. Can someone give me a clue pr send me a pic? Thanks very much.
Jim | | | | | Joined: Sep 2001 Posts: 29,270 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,270 | Some people have reported that NAPA has the temperature adapter as Balkamp part #701-1542. Also, Jim Carter and other vendors sell an adapter. You might want to use blue rtv sealer but mine does not leak without it. The correct adapter has a "rim/shoulder" that the temperature sender seals against. | | |
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