Torquing spark plugs.

[EV0300]

The manual say 25nm but only my micrometer goes 25nm is there a trick to adapt a sparkplug socket to 1/4 drive?

 

[Ian91]

1 ugga Dugga on the impact gun is 25nm...

 

[vr401]

Always did them by hand.

 

[VIN18M]

Turn them by hand, then half rotation with the ratchet

 

[evo-gsr]

Same. Dunno why they would need to be torqued?

 

[evo-gsr]

1 ugga Dugga on the impact gun is 25nm...

What if you get a little trigger happy.....?

 

[EV0300]

i usually do it by hand myself but the way the box says to do it feels really tight and i'd hate to strip the head threads.

 

[bazeng]

The plugs need the correct torque to work as designed. It's all about heat dissipation to the head. Not enough torque = not enough crush and potentially contact surface area not as per original design.

I'm a bit fussy as I've always worked in the engineering area and everything is somewhat needed to be controlled and quality checked.

Check out the NGK faq page. All explained there.

 

[EV0300]

cheers Baz will do

 

[bazeng]

Most cases people will get a feel for it with experience but for the extra effort of a minute or two, measuring the torque will give you tha piece of mind that it's not too tight or too loose.. As Goldie locks would say.. Just right...

 

[rigby]

I've always just done mine up until they started to feel tight and couldn't be turned with a lazy wrist movement. As long as they are pretty firmly in without applying a lot of pressure you'll be right