Thats what I've got in my Skoda manual too - strange to shear a plug that is new - suppose anything can happen once. Is your torque wrench a known quantity that you can trust?, had a new clark wrench once that when set to 60nm, actually "broke" @ 120nm. Shop took it back full of apologies, just a thought.

Thats what I've got in my Skoda manual too - strange to shear a plug that is new - suppose anything can happen once. Is your torque wrench a known quantity that you can trust?, had a new clark wrench once that when set to 60nm, actually "broke" @ 120nm. Shop took it back full of apologies, just a thought.

Yes m8 torque wrench is one I use at work. Only a few weeks old and calibrated by our quality/calibration team too. Will take the plug back in the week and see what they say. Really put me off using em to be honest. Think i might bite the bullet and buy some Denso's. Used in previous cars and always been good, just a tad expensive, but then i guess u get what u pay for.

Have used NGK plugs since I was 18 in diffferent vehicles over the years - I'm 52 now, and I've never had a problem, but I suppose there is always a bad one somewhere. Nissan forum that I used be on when I had mine swear by NGK. Give em another go,I dont think you will be disappointed.

yup i agree with phil, have used them for years without issue.

I don't ever use a torque wrench for putting in plugs, too much risk of damage to the thread in the head imo, much easier to get the right 'feel' by hand.

I too have used NGK in all my cars over the years and have never been dissapointed. However this is the second plug over recent years ive had a problem with. last one was a snapped core in my previous car. Dont normally use a torque wrench myself but had one at home that I had borrowed from work to do my sump with after replacing the oil pickup so thought I would do it right for a change....... Guess that'll teach me to do things the right way lol.

Hmm very strange for a plug to shear thread. As Luca states I have always used feel to tighten up plugs. Used NGK for years either no issues. Again don't be put off buddy.

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Dont normally use a torque wrench myself but had one at home that I had borrowed from work to do my sump with after replacing the oil pickup so thought I would do it right for a change....... Guess that'll teach me to do things the right way lol.

Sods law

too much risk of stripping the thread, stick to by hand!