I have a quick question about the size of the hex wrench that is used in the two bolts that hold the outer caliper in place on the front brakes on a 2010 XKR. They are the standard non-Alcon 15" vented brake discs.

I have a set of wrenches that I used on my 2007 XK however the hex size on the 2010 seems to be larger.

Can anyone advise what the correct size is?

Thanks in advance

 

You might want to buy a wrench set, when you run into this problem just try different wrenches until you find the one that fits.

That or measure what you want to put a wrench on.

 

are you talking about the 9mm allen key needed to remove the caliper

 

Thanks Ian. I have a wrench set of long hex sockets which jumps from 8mm to 10mm. It was fine for the bolts on the '07 caliper and I wanted to know if the head was metric or SAE before going out to buy the size I'm missing. Sounds like I'm in need of a 9mm hex socket.

 

I'm pretty sure every fastener is Metric on our cars.

 

I had the same problem when i went to change them I had many sets that went from 8mm to 10mm with no 9mm Went down to local Home Depot and picked up a nice set with the 9mm for $10.00

 

07 XKR hex key for front brakes (on mine) is 9 mm.

 

This has been covered about a million times on these forums (I exaggerate only a little!) but if you have either the JLR 355 mm or 380 mm front brakes (pretty much standard across all North American JLR offerings since at least 2008) then you need a 9 mm hex driver to undo the caliper slide pins.

 

The joy of "infinite scroll" strikes again.

I've amended the thread title adding 9 mm to reduce the possibility of future rediscovery and repetition.

Graham