Spark plug refresh is in Service Three or Service Two for V6S.

 

I wondered the same thing, although sitting in a combustion chamber isn't exactly drying out in fresh air.

 

Jimbo, see post #2 in this thread, quote: "The original 2014MY "maintenance check sheet" (ie service schedule) shows a spark plug change interval of 6 years / 96k miles for all F-Types except the V6S where it shows 3 years / 48k miles". So service three for the V6S and service six for the rest. Even then, as I said in that post, it seems the spark plug interval was later changed for the V6S to the same as all the rest, ie 6 years / 96k miles, although search as I might I can't find a later "maintenance check sheet" to verify this, I just remember reading about it somewhere.
Also I wonder the same as rbr and surely it should be based entirely on mileage and have nothing to do with age.
Another reason why I am not worried about renewing my spark plugs even though they are now over four years old.

 

Same here. It's definely all over the place, Jag's website still shows V6 S Service Two with a plug renew @ 24 months, I actually thought that was upped to 36m. Then again, no service is solely time bound, they are 10K miles or timed-out, so the 20K mileage takes precedence. Right?

At any rate, if the gaps don't hold there is no way to know til you've blown the coil and start misfiring. We also risk roasting cats with the unburned fuel from strained coils trying to close wide gaps. I haven't seen fuel escape near redline again, but stupid me I forgot to look while on the dyno.

I personally don't think it makes sense for the entire boost loving world to be switching the same plugs every 20-30K, and for us not to. Doesn't pass the common sense test.

That said, I had no idea it would be such a PITA or a $1,200 job. Jeese.

 

No special tools really, the last one closest to the driver is somewhat of a PITA but with a short Torx and some patients its not hard. i believe at the time i got the gap from the service manual. compared to take-outs was the same figured it was good. Disconnecting the supercharger cooling lines makes removing those pesky shields easier. i think i had it done in under 2 hrs.