spark plug data

[Geoff Peace]

Does anyone know the reach, hexagon size and tightening torque for the iridium plugs fitted to the new yaris? Denso ref. SC20HR11.
NGK ref ILKAR7B11. I have searched the relevant websites but these would seem to be a new plug and the websites are not up to date. Many thanks to anyone who can supply the information.

Regards Geoff Peace.

[CTScott]

16mm, 183 kgcm (13 ft lb)

That is actually the same as for all of the Yaris engines (1.0, 1.3, 1.5, 1.8).

[lejulie]

How often do the iridium spark plugs need to be replaced? Is it 120,000 miles? OP, are you replacing yours?

Thanks!

[Geoff Peace]

Thankyou for your replies everyone. Book says replace at 60,000 miles which means 30,000 miles for me. I have since found out from NGK plugs that they are 14mm. hexagon 15-20Nm torque and 26.5mm. reach. If plugs are not removed for a long time the intermetallic reaction means they can be the very devil to remove and have been known to snap. With such a long reach and only M8 thread I intend to remove them say every two years and coat the threads with copper grease.

Regards Geoff Peace.

[CTScott]

Ahh, you have the new 1NR-FE in your Yaris, not the 2NZ-FE or 2ZE-FE.

[Geoff Peace]

Yes it has iridium plugs and I was being very careful not to overtighten them.

Regards Geoff Peace