Changed my spark plugs today. (1.0 Ecoboost)Best price I could find was all three for £25. Some places wanted over 40 quid!The tool I used was a 14mm thin wall bi hex with a 3/8's drive, Laser part number 4376. It's a proper spark plug tool with a spring insert to hold the plug. Cost 7 quidfrom localauto factors.
You then need a long extension, I don't have a long 3/8 but a do have a 3/8 to 1/2 conversion socket and a long 1/2 extension which worked fine.
Bit of copper slip on the new plug threads; be warned you cannot start these plugs in the thread by hand, so I used the spark plug tool attached to a long flexible to gently start the threadby hand and then tighten with a solid extension.
To remove the coil tops and refit the plugs took about 20 mins.
Edited by: pegleg