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01-01-2022, 08:16 PM | #1 |
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Temp sensor port thread chaser
Been searching the inter webs for a thread chaser or thread restorer for 59a temp sensor ports on the heads. Can’t seem to find one in 3/8 in-18 thread pitch. Anyone have any leads on where i can buy one?
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01-01-2022, 08:24 PM | #2 |
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Re: Temp sensor port thread chaser
Try a pipe thread. Be careful not to go too deep, they are tapered.
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01-01-2022, 08:43 PM | #3 |
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Re: Temp sensor port thread chaser
try 3/8 npt
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01-01-2022, 11:38 PM | #4 |
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Re: Temp sensor port thread chaser
3/8 npt
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01-02-2022, 12:26 AM | #5 |
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Re: Temp sensor port thread chaser
Disclaimer; I am not 100% intimate with late model flatheads....
However...are you sure its NPT [National Pipe Taper]? I thought it was NPP [National Pipe parallel]. I thought the female thread [in the head] was parallel, and the male thread [the temp probe] is tapered, so that the more you tighten it up, the tighter it gets, thus sealing.
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01-02-2022, 03:30 AM | #6 | |
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Re: Temp sensor port thread chaser
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Quote:
Believe me, the MALE tapered thread WILL get tighter, the deeper it goes into a FEMALE tapered thread. DD |
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01-02-2022, 04:05 AM | #7 |
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Re: Temp sensor port thread chaser
The port in the head is NPT.National Pipe Taper.Brian was correct.
Last edited by deuce lover; 01-02-2022 at 10:14 AM. |
01-02-2022, 10:10 AM | #8 |
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Re: Temp sensor port thread chaser
Thanks for all the info but where do I get one?
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01-02-2022, 10:13 AM | #9 |
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Re: Temp sensor port thread chaser
Here is one of many on EBAY or your local Ace Hdwe.
https://www.ebay.com/itm/31342088801...EAAOSwvypgK1VR |
01-02-2022, 10:25 AM | #10 |
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Re: Temp sensor port thread chaser
Make sure the tap is made of HSS (High Speed Steel) not HC (High Carbon)
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01-02-2022, 10:52 AM | #11 |
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Re: Temp sensor port thread chaser
When I needed one for my 8ba I bought a set at Harbor Freight for cheap. May not be the highest quality but chased the threads on the head no problem.
https://www.harborfreight.com/6-piec...set-91395.html
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01-02-2022, 11:12 AM | #12 |
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Re: Temp sensor port thread chaser
got it. thanks gentlemen. added to my list of things to buy.
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01-02-2022, 11:23 AM | #13 |
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Re: Temp sensor port thread chaser
so next question on engine ports, on each side of the block behind water pumps there are threaded ports for either threaded plug (like on my other bare block) or drain pet cocks for the water jackets. Should I plug them or use pet cocks? what size are those threads normally?
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01-02-2022, 11:27 AM | #14 |
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Re: Temp sensor port thread chaser
Believe me, the MALE tapered thread WILL get tighter, the deeper it goes into a FEMALE tapered thread. DD
Yes, but if you tap the tapered female thread TOO deep, the hex on the male nipple will bottom out, preventing the threads from forming a seal
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01-02-2022, 12:12 PM | #15 | |
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Re: Temp sensor port thread chaser
Quote:
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01-02-2022, 12:17 PM | #16 |
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Re: Temp sensor port thread chaser
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01-02-2022, 12:26 PM | #17 |
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Re: Temp sensor port thread chaser
thanks again gentlemen.
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01-02-2022, 01:00 PM | #18 |
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Re: Temp sensor port thread chaser
I would use drain cocks.
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01-02-2022, 01:29 PM | #19 |
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Re: Temp sensor port thread chaser
Me too. Ford installed drain cocks in the block.
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01-02-2022, 02:56 PM | #20 |
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Re: Temp sensor port thread chaser
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