whatever size they are they might benefit from a clear out with a tap. They get a bit congested with old thread locking compound. You can usually tell by feel within a turn or so whether a bolt is meant to go into a hole - if it's the wrong thread you meet much stronger resistance and it feels like you're trying to push metal out of the way!
Southernlandy
Active Member
Should be a 13mm Bihex. Anything else will round them off
aaronmorris
Head's a shed
They are usually covered is crud and crap, give them a good wire brush and the spanner a good wiggle to get it on. Should be 14mm.
200tdi ayre
Well-Known Member
the head " should" be 14mm (9/16 technically) as i've just changed 2 swivels today although age may make them smaller
on my 94 disco they are definately 14mm
