[Healeys] Thermal Switch Hole in Cylinder Head

[Team.net]

used for the short-lived thermo carb.

> On Apr 3, 2021, at 3:31 PM, Harold Manifold via Healeys <healeys at autox.team.net> wrote:
> 
> Hello,
>  
> What is the history for the Thermal Switch Hole in the cylinder head. Item 8 in the attached drawing. Some heads have the hole in the casting and it is blanked off and in some heads the hole was never added.
>  
> Harold Manifold
>  
> <Cylinder Head.pdf>_______________________________________________
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