transmission drain plug HF magnet
Posted: Sun Nov 08, 2020 9:26 am
So I ordered another hard-to-source thing from #@!% hansautoparts (lol), while I was at it add a couple transmission drain plugs.
https://www.hansautoparts.com/WHT001937 ... -Plug.aspx
Noticed the plug had a recess on the inside that would be perfect for a magnet.
I had some HF magnets so I checked the size - 8mm. The recess in the plug is 7.4mm.
The depth of the recess is more than the thickness of the HF magnet, so I grabbed a regular 5/16" drill bit (didn't have an 8mm)
and drilled it out a little,. Seemed to be good enough, but tight.
So I heated up the plug with a torch
and the magnet dropped right in. Bad part was the heat killed the magnet. Fail
Found out most neo magnets are good to ~250F but lose power above that and are killed ~600F.
The good thing is, because of the gap under the magnet I just hit it with a small punch and the dead magnet breaks and falls out.
Tried it again, worked the drill bit around a little more, warmed up the drain plug just a little.
Tapped it in as best I could into the now-ugly flame tempered plug without damaging it, careful not to even scratch the magnet.
![Image](https://i.imgur.com/ioZFBgql.jpg)
I did put a little red loc-tite in a spot, but didn't want to completely seal the magnet as there is a small air pocket behind the magnet.
So it's a magnetic drain plug for less than $3.
What could go wrong![Question :?:](./images/smilies/icon_question.gif)
https://www.hansautoparts.com/WHT001937 ... -Plug.aspx
Noticed the plug had a recess on the inside that would be perfect for a magnet.
I had some HF magnets so I checked the size - 8mm. The recess in the plug is 7.4mm.
The depth of the recess is more than the thickness of the HF magnet, so I grabbed a regular 5/16" drill bit (didn't have an 8mm)
and drilled it out a little,. Seemed to be good enough, but tight.
So I heated up the plug with a torch
![Idea :idea:](./images/smilies/icon_idea.gif)
Found out most neo magnets are good to ~250F but lose power above that and are killed ~600F.
The good thing is, because of the gap under the magnet I just hit it with a small punch and the dead magnet breaks and falls out.
Tried it again, worked the drill bit around a little more, warmed up the drain plug just a little.
Tapped it in as best I could into the now-ugly flame tempered plug without damaging it, careful not to even scratch the magnet.
![Image](https://i.imgur.com/ioZFBgql.jpg)
I did put a little red loc-tite in a spot, but didn't want to completely seal the magnet as there is a small air pocket behind the magnet.
So it's a magnetic drain plug for less than $3.
What could go wrong
![Question :?:](./images/smilies/icon_question.gif)