Price,
The threaded section in the block is quite thick. I don't think you
have to worry about it breaking off. Probably a Whitworth sized nut.
There should be a fiber washer between the block and the petcock.
Cheers,
Bob Haskell
AHCA 3000 Mk I registrar
http://www.ciahc.org/registry_3000mk1.php
On 08/06/2014 07:24 PM, R. Price Lindsay wrote:
> I am in the process of flushing out the cooling system of my BJ8. It has been
> a few years since I did this and when I did it last, I did not open the block
> drain. I'm not sure it has ever been opened but its time has come. I presume
> the unit is brass, but not sure. My concern is if I put too much pressure on
> it with a wrench (I want to take it off rather than try and turn the shuttle
> cock) it will break or the threads will strip creating another set of "real"
> issues.
>
> Any words of caution, processes to follow or other encouragement??
>
> Thank you, as always, in advance.
>
> Price Lindsay
> 67 BJ8
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