What torque for plugs?

[Turner]

172 ph2 2001 is it 15nm and is it a 16mm plug spanner needed?
many thanks

 

[TomTom]

Its about 25/30 n/m but I wouldn't trust a wrench to be honest.

Start it by hand and spin it up till it touches the gasket, then with a ratchet you'll probably go anoter 1/4 or 1/3 of a turn (as you squash the gasket) then you'll feel it go tight, then give it a nip, done.