Side water manifold studs

["Slack Alice" Simon]

What is the thread tapped into the block for the studs that hold the side water manifold?

BSF or Whit?

Thanks

[Tiger]

I think from memory it’s BSF.
NEXT TIME IN THE GARAGE I WILL CONFIRM

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Yes I can confirm it’s 5/16” BSF
NOT sure if all engines the same.
That’s a 3 bearing Ruby

[Howard Wright]

I think from memory it’s BSF.
NEXT TIME IN THE GARAGE I WILL CONFIRM

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Yes I can confirm it’s 5/16” BSF
NOT sure if all engines the same.
That’s a 3 bearing Ruby

+1

I’ve just installed a side branch on a 1930 engine.

Howard

["Slack Alice" Simon]

Thanks