Re: Aluminum heads -- spark plug torque

[Bullwinkle <yd3@nvc.net>]

I would think that the finger tight, 1/4 turn concept would only
apply to that particular spark plug with that particular style of
seat, or sealing washer.  Those directions were quite often used
years ago, as many people didn't know what a torque wrench was,
or even had one.  Your best bet is to consult the shop manual, or
get the torque specs from the plug manufacturer.