Howdy Folks,
For some inexplicable reason one of the two HT Bolts that fix the R/H Rear Brake Caliper to the Rear Hub has fallen-out and been lost.

Can someone please give me the actual specs for these HT Bolts (size thread and length) so that I can obtain replacement Bolts ?

This is an URGENT matter ... as car is unsafe and unusable until fixed.

 

Problem is solved... was able to get a couple of replacement bolts today from: JagLand.com.au/

I'm as happy as Larry now.

 

LCGI, normally you can run over to your local auto parts store and they will have something that will work. As long as you stick with a grade 5 or 8 bolt, that will be more than capable of dealing with what the brakes can dish out. Your other choice would be a fastener specific store (in the US, we have a store called "Fastenal"). That would be a store that you can walk into and they will have what you are after most likely sitting on the shelf.

 

Thermo,
Thanks for your comments on HT Bolts - it is most appreciated.

On another matter..... say I wanted to replace the M12 x 1.5 studs as exist in the wheel hubs (5 in each)..... do you think these are a standard items too...... or is there something peculiar about Jaguar hubs and how the said studs are fixed into them?

Your further remarks most welcome

 

LCGI, the studs are nothing special as far as I am aware. Where things can get a little interesting is you would have to measure the hole in the hub (down to 0.01mm if not more accurate) and then find another stud that would press fit into a hole that size. It should be a fairly common size and most studs would fit without any modification. This would then allow you to go to a different thread pitch (say M12 x 1.25 which is more common). This would then open up the options with the lugnuts you can use.

Where the problem can come is if you use say a new stud that is just slightly too small, it may initially fit in there and allow you to tighten the wheel up. Then, say a year later, you need to remove the wheel, the stud would spin in the hole, not allowing the lugnut to come off. You can see where this suddenly because a big PITA. The way to check this is simple. When you are putting in a new stud, you should have to use a lugnut and a few spacers between the lugnut and hub to pull the stud into place and you should have to use a little bit of force to get it into place. It shouldn't just slide in (ie, using a stubby socket wrench and turning the lugnut with a single hand and not straining too much).

As for whether a place like Fastenal would carry something like this, that is hard to say. I know they have some really specialized stuff and may carry stuff like that or them may simply leave that to the auto parts stores as that would be a lot less stuff they would have to keep on hand

 

Thermo,
Thank you again for your in-depth and discerning words of empirical wisdom.