Hi all

anyone tell me the bolt sizes for the caliper carriers, front and rear, the 12 star torx jobs - I want to buy some before I attempt to change the discs(all round) on my pre fl  140 beast, I think hex heads will be easier to handle than the 12 stars, especially on the rears!!

Don't know the MY for your Yeti but the parts diagrams for brakes on a MY2014 are here and will hopefully help.

 

@J.R. may be able to be more specific ...

 

Hi.    I believe the rears use a M14 triple square i.e. 12 point.   Some refer to them as Torx, but they are not.

my error used just as a descriptive!!

10 hours ago, Frenchtone said:

Hi all

anyone tell me the bolt sizes for the caliper carriers, front and rear, the 12 star torx jobs - I want to buy some before I attempt to change the discs(all round) on my pre fl  140 beast, I think hex heads will be easier to handle than the 12 stars, especially on the rears!!

 

They're known by the Americans as "Triple Square" or VAG as ZXN and are used as they can handle higher torque before camming out.

 

https://wiki2.org/en/List_of_screw_drives#Triple-square (XZN)

 

Triple-square (XZN)

The triple-square, also known as XZN, is a type of screw drive with 12 equally spaced protrusions, each ending in a 90° internal angle. The name derives from overlaying three equal squares to form such a pattern with 12 right-angled protrusions (a 12-pointed star). In other words, three Robertson squares are superimposed at a successive 30° rotation. The design is similar to that of the double-square—in both cases, the idea being that it resembles a square (Robertson) but can be engaged at more frequent angles by the driver bit. These screws can be driven with standard Robertson bits.

Sizes are M4, M5, M6, M8, M9, M10, M12, M14, M16, and M18. Despite the similar naming scheme to metric fasteners, there is no correlation between the name of the size and the dimensions of the tool.

The 12-pointed internal star shape superficially resembles the "double hex" fastener head, but differs subtly in that the points are shaped to an internal angle of 90° (derived from a square), rather than the 120° internal angle of a hexagon. In practice, drivers for the fasteners may or may not interchange, but should be examined carefully for proper fit before application of force. A hex key should not be used where a key of square cross-section is the correct fit.

Triple-square drive fasteners have been used in high-torque applications, such as cylinder head bolts and drive train components. The fasteners involved have heads that are hardened and tempered to withstand the driving torque without destroying the star points. They are commonly found on German vehicles such as BMW, Opel, Mercedes, Porsche and those from the Volkswagen Group (Audi, Seat, Skoda, and Volkswagen).

 

With due deference to AG, there are other 12-point varieties available - see https://wiki2.org/en/List_of_screw_drives

 

Thanks for that, currently cannot get at the discs etc I have misplaced the security nut, and I have a screw in one of my rear tyres. Hopefully a new nut arrives this week!

I lost mine, drove off with it still on and it must be in a verge somewhere.

 

I took a photo of the nut, inverted it and looked at the photos of secondhand keys on ebay and quickly found an idential replacement at much less cost than an original Skoda one. I think mine came from a scrap VW.

Edited 7 April, 20206 yr by kenfowler3966

FYI VAG wheel security nut profiles:

 

 

VAG locking wheel nut profiles

Edited 7 April, 20206 yr by StickyMicky
missing image