That pesky water nipple (aka the cursed water plug)
#1
SADFab Destructive Testing Engineer
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Thread Starter
iTrader: (5)
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
Total Cats: 1,866
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Spent some time with a trashed head today. Propane and an air hammer made short work of removing this thing.
![Name: HUMLp7K.jpg
Views: 592
Size: 2.93 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230232d1683052259-pesky-water-nipple-aka-cursed-water-plug-humlp7k.jpg)
![Name: U5sU6oo.jpg
Views: 474
Size: 2.02 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230233d1683052259-pesky-water-nipple-aka-cursed-water-plug-u5su6oo.jpg)
![Name: OErKdMe.jpg
Views: 601
Size: 1.96 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230234d1683052259-pesky-water-nipple-aka-cursed-water-plug-oerkdme.jpg)
18mm hole. So either use an 18mm freeze plug (Mellings MPC-204B, Dorman 565-102) or drill it and tap for M20x1.5 (18.5mm drill bit) Or M20x2? And not have to drill
![Name: juLKWtc.jpg
Views: 353
Size: 1.48 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230235d1683052259-pesky-water-nipple-aka-cursed-water-plug-julkwtc.jpg)
![Name: 5byYNJO.jpg
Views: 361
Size: 1.33 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230236d1683052259-pesky-water-nipple-aka-cursed-water-plug-5byynjo.jpg)
![Name: uC05dJl.jpg
Views: 367
Size: 1.14 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230237d1683052259-pesky-water-nipple-aka-cursed-water-plug-uc05djl.jpg)
Hole above it is M12x1.5 if you want to do anything weird with that
![Name: mafDt8v.jpg
Views: 353
Size: 1.05 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230238d1683052259-pesky-water-nipple-aka-cursed-water-plug-mafdt8v.jpg)
![Name: BtlLwtz.jpg
Views: 356
Size: 1.62 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230239d1683052259-pesky-water-nipple-aka-cursed-water-plug-btllwtz.jpg)
Taint size is just under 14mm
![Name: VsBEiRh.jpg
Views: 351
Size: 1.20 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230240d1683052259-pesky-water-nipple-aka-cursed-water-plug-vsbeirh.jpg)
Hope this helps someone down the line. I'll update with how I plug mine.
@concealer404
![Name: HUMLp7K.jpg
Views: 592
Size: 2.93 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230232d1683052259-pesky-water-nipple-aka-cursed-water-plug-humlp7k.jpg)
![Name: U5sU6oo.jpg
Views: 474
Size: 2.02 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230233d1683052259-pesky-water-nipple-aka-cursed-water-plug-u5su6oo.jpg)
![Name: OErKdMe.jpg
Views: 601
Size: 1.96 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230234d1683052259-pesky-water-nipple-aka-cursed-water-plug-oerkdme.jpg)
18mm hole. So either use an 18mm freeze plug (Mellings MPC-204B, Dorman 565-102) or drill it and tap for M20x1.5 (18.5mm drill bit) Or M20x2? And not have to drill
![Name: juLKWtc.jpg
Views: 353
Size: 1.48 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230235d1683052259-pesky-water-nipple-aka-cursed-water-plug-julkwtc.jpg)
![Name: 5byYNJO.jpg
Views: 361
Size: 1.33 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230236d1683052259-pesky-water-nipple-aka-cursed-water-plug-5byynjo.jpg)
![Name: uC05dJl.jpg
Views: 367
Size: 1.14 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230237d1683052259-pesky-water-nipple-aka-cursed-water-plug-uc05djl.jpg)
Hole above it is M12x1.5 if you want to do anything weird with that
![Name: mafDt8v.jpg
Views: 353
Size: 1.05 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230238d1683052259-pesky-water-nipple-aka-cursed-water-plug-mafdt8v.jpg)
![Name: BtlLwtz.jpg
Views: 356
Size: 1.62 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230239d1683052259-pesky-water-nipple-aka-cursed-water-plug-btllwtz.jpg)
Taint size is just under 14mm
![Name: VsBEiRh.jpg
Views: 351
Size: 1.20 MB](https://www.miataturbo.net/attachments/general-miata-chat-9/230240d1683052259-pesky-water-nipple-aka-cursed-water-plug-vsbeirh.jpg)
Hope this helps someone down the line. I'll update with how I plug mine.
@concealer404
#5
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Thank goodness for gmail archives saving all my previous parts orders:
McMaster-Carr Alloy Steel Cup Point Socket Set Screw, 3/4"-16 Thread, 3/4" Length, packs of 5
IIRC it was a slightly undersized fit but the tap was a lot cheaper than the one that was a slightly better size (this was 5 years ago). I used the JB weld just to make sure it stayed in and didn't leak.
McMaster-Carr Alloy Steel Cup Point Socket Set Screw, 3/4"-16 Thread, 3/4" Length, packs of 5
IIRC it was a slightly undersized fit but the tap was a lot cheaper than the one that was a slightly better size (this was 5 years ago). I used the JB weld just to make sure it stayed in and didn't leak.