Top mounts - What size spanner?

[RipGroove]

Need to have a look at mine and want to make sure I got the right size spanner before stripping the wipers and scuttle off etc. So can anyone cofirm what size spanner is needed?

 

[RipGroove]

Thinks its 18mm

 

[Jordysport]

IIrc it is 18 or 21 can't remember off the top of my head, I use my airgun just whips them off in seconds, no messing about with swan neck spanners.

 

[BenW]

18mm, check my how to thread

You'll be best off with a swan neck though, a straight spanner won't give very good access