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Radiator Drain Plug Stripped Threads


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#1 minicooperr

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Posted 24 July 2020 - 06:25 PM

My radiator drain plug started to weep so I took it off to find all the threads have stripped, anybody know how it is supposed to seal and where I can get another one from can’t really get in to see the radiator threads but they feel alright, or anybody know the thread on it, it is an unusual part?


Only just managed a couple of miles today

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#2 Gcal

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Posted 24 July 2020 - 07:41 PM

Couldnt quite find a radiator drain plug,not sure if this one would be similar https://www.minispor...gine-block.html

#3 minicooperr

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Posted 24 July 2020 - 07:43 PM

Couldnt quite find a radiator drain plug,not sure if this one would be similar https://www.minispor...gine-block.html



Yeah I saw that one does look similar but unsure on what thread that is and what thread I need

#4 imack

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Posted 24 July 2020 - 08:00 PM

That looks rather like a fan switch blanking plug. Most mini fan switches I think are M22 x 1.5
I'd imagine it should have a dowty washer to seal it.

#5 Gcal

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Posted 24 July 2020 - 08:01 PM

Tried moss Europe aswell but cant get a thread size,mini spares describes the same plug with the size 1/4"bsp

#6 minicooperr

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Posted 24 July 2020 - 08:14 PM

That looks rather like a fan switch blanking plug. Most mini fan switches I think are M22 x 1.5
I'd imagine it should have a dowty washer to seal it.



Something like this?

https://www.ebay.co....tm/351987523520

#7 imack

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Posted 24 July 2020 - 08:28 PM

That looks rather like a fan switch blanking plug. Most mini fan switches I think are M22 x 1.5
I'd imagine it should have a dowty washer to seal it.

Something like this?

https://www.ebay.co....tm/351987523520
That looks like the kind of thing, but unfortunately it looks like the rubbish plastic blanking plug that was fitted to my Radtech radiator. The '0' ring doesn't have a nice groove to locate in and gets squeezed out of the plug as you tighten it. I struggled to find a decent replacement plug on line and ended up making my own on the lathe.

If it is M22 x 1.5 you could just fit a fan switch as a plug.

Edited by imack, 24 July 2020 - 08:30 PM.





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