Temp Sending unit problem


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By 55Birdman - 17 Years Ago
OK I screwed up. Well I didnt but my friend did. Installing a set of 113 heads on my bird and I encountered a problem. When I had the heads worked the machinist installed a sleeve(?) in the hole where the sending unit fits. Sorry I dont know the proper name for it . But,when the sleeve was installed the sending unit wont fit anymore. The hole is too small and the threads won match. It went from 3/8 down to 1/4. I cant screw the sending unit in the new opening. So, my buddy said all we need to do is to take an "easy out" and it will come out. Well nice idea but no go. Now the threads are screwed up because the sleeve wont turn and come out due to the easy put spun around and messed them up.    So, now I have a hole with no threads and a sending unit with no place to go. How do I 1. remove the implant or2. repair it to accept the  3/8 threads on the sending unit ? I dont have access to a bunch of tools and machinery to help me . Just muscle power and a few tools. Cant afford to send it to a shop to be removed. Wife is out of work and money is a bit tight for now.

My guess it to get a 3/8 tap and make new threads and it will fit ( I hope).  Any help is appreciated . Yes he is still my friend. But he is on probation.   

By paul2748 - 17 Years Ago
55Birdman (11/4/2008)
OK I screwed up. Well I didnt but my friend did. Installing a set of 113 heads on my bird and I encountered a problem. When I had the heads worked the machinist installed a sleeve(?) in the hole where the sending unit fits. Sorry I dont know the proper name for it . But,when the sleeve was installed the sending unit wont fit anymore. The hole is too small and the threads won match. It went from 3/8 down to 1/4. I cant screw the sending unit in the new opening. So, my buddy said all we need to do is to take an "easy out" and it will come out. Well nice idea but no go. Now the threads are screwed up because the sleeve wont turn and come out due to the easy put spun around and messed them up. So, now I have a hole with no threads and a sending unit with no place to go. How do I 1. remove the implant or2.repair it to accept the 3/8 threads on the sending unit? I dont have access to a bunch of tools and machinery to help me . Just muscle power and a few tools. Cant afford to send it to a shop to be removed. Wife is out of work and money is a bit tight for now.



My guess it to get a 3/8 tap and make new threads and it will fit ( I hope). Any help is appreciated . Yes he is still my friend. But he is on probation.




The solution I would suggest is to drill or have drilled the bung (i believe that is the proper term) to the correct size and tap it for the temp sender (I believe the 56 is 3/8 pipe).



The other possible solution is to make up a tool to pull the bung out. The TBird suppliers have a tool you can buy that does that, but if the thread in the hole is screwed up it may not work. They also have the correct bung for the head.
By Eddie Paskey - 17 Years Ago
Hey 55;   I had the same problem.  If you have a air operated jig saw ( Home Depot) carefully cut the bushing in 2 sections, thenlift it out,  Cut Slowly and carefully you do not want to cut into the head. Then the bushings are avail. at T-Bird suppliers or yblock suppliers. I also put a magnet in the water jacket and pulled as much cuttings out as possible.  YOU CAN DO IT!!!  Just go slow.  Good luck               God Bless     Eddie
By Ted - 17 Years Ago
For retapping to the 3/8 NPT size, redrill the hole in the bushing using a 9/16” drill.