2.2 Turbo...

[evocarlos]

curfull gaping precious metal plugs it snaps the tip off and then gets stuck down the side of your piston they should be fit and forget no adjustment needed

 

[TFD]

Yes, I've heared mixed reviews on gapping iridiums. I allways gapped my coppers to 0.8/0.7 mm with good result.
I thinks its the way you gap a plug that makes or brake a plug. Seen people put the 0.8mm feelergauge between the sparktip and the (I dont know how this is called...) and then press/hammer whatever that thingy down till the feeler is snug. This is how you can ruin the tip in my opinion.

I just use a tiny hamer and carefull adjust the thingy closer to the tip step by step without the feelrgauge in between. This way you never hit the tip.
1 hit, meassure
2 hit, meassure
3 hit...broke hahaha lol

You get the idea. Ran 300 miles now and all is well.

Thanx for pointing out though