Spark plugs

[Hooli]

I fitted Iridium plugs at 13663 miles and finally changed them at 45374 miles..Some 31,700 miles later.
Never again as they had well and truly rusted and I was worried about snapping them off when I finally removed them..They were that fookin' tight!!!

Take 'em out occasionally then. I tend to crack mine loose & retighten if I've got the tank off to avoid that issue.

[Gsxjohn]

Hi all,
I know what "the book" says about spark plug replacement intervals.
That seems a very short change interval.
Do you all replace yours as the book says or do you have your own regime.
When I originally owned Sophie I replaced at 30k miles.
She's now done 40k miles. I am doing a service on Saturday and wondered about plugs. She is running perfectly with no misfires or any other bad plug symptoms. I have a new set of NGK plugs in stock (NOT IRIDIUM).

My inclination is to change when I change the air filter.
What is your plug regime ?

[Andre]

After experiencing a bad plug requiring a replacement of the head cover gasket I replace them as suggested by the manual.

[froudy]

A bit of coppercoat or never seize helps

I was advised many years ago NOT to Coppaslip spark plug threads due to the risk of overtightening and snapping them off in the head..

[KiwiCol]

Guilty.     I use coppercote on my plug threads. Tighten to contact & ½ a turn more.  If I'm inspecting / cleaning & re-gapping (boat engine mainly), tighten to contact & 1/4 a turn more. Always been ok to date.

[grog]

Froudy, hate to think how many spark plugs ive lubed. Never broken one. The old tapered seat ones was always tighten with tension wrench.