that head looks different to other 4a heads ive seen.
it has the oil port and dizzy cam cap on your right hand side and a funky center part where the plugs go.
and i think the breather (head/block) port is normaly squarer.
either way, yes that hole goes down into the block but the nut would have landed on the splash tray in the sump.
have you got a telescopic magnet stick ?
i dont know what torque specs are for the cam caps, i just tighten them up to what i think is right![]()
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