[Healeys] Core plug query

[Alan Seigrist]

I had to replace that plug on my BJ8 once, and rather than pulling the
head, I just got one of those squeezing rubber bolt on types that you
tighten down with a nut.  worked perfectly.  This looks like some variation
of the same.

On Fri, Oct 31, 2025 at 12:03 PM Michael Oritt <michael.oritt at gmail.com>
wrote:

> Good catch Bob!  Wow, it wouldn't be such a super thing to have the plug
> go away....
>
> Best--Michael Oritt
>
> On Fri, Oct 31, 2025 at 10:39 AM Bob Spidell via Healeys <
> healeys at autox.team.net> wrote:
>
>> I did a little diggin ...
>>
>> Apparently, they are designed to melt if the engine overheats, which
>> would be grounds for voiding the warranty on a re-man. I wonder if the plug
>> is made of bismuth, which is what sets off automatic fire sprinklers.
>>
>>
>> https://www.toyotanation.com/threads/mysterious-plugs-in-engine-block.1659464/
>>
>> On 10/31/2025 5:08 AM, Simon Lachlan via Healeys wrote:
>>
>>  I saw this on Facebook just now. Just curious….what’s that thing in the
>> middle of the core plug? And, if it’s a good thing, why don’t all the
>> plugs have one?
>>
>> Thanks, Simon
>>
>> _______________________________________________
>> Support Team.Net http://www.team.net/donate.html
>> Suggested annual donation  $12.75
>>
>> Archive: http://www.team.net/pipermail/healeys
>> http://autox.team.net/archive/healeys
>>
>> Healeys at autox.team.net
>> http://autox.team.net/mailman/listinfo/healeys
>>
>> Unsubscribe/Manage:
>> http://autox.team.net/mailman/options/healeys/michael.oritt@gmail.com
>>
>> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
>
> Archive: http://www.team.net/pipermail/healeys
> http://autox.team.net/archive/healeys
>
> Healeys at autox.team.net
> http://autox.team.net/mailman/listinfo/healeys
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/healey.nut@gmail.com
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20251031/b855135e/attachment.htm>