Wheel screw identification

[Gibbies]

Anyone know what this Allen screw is for?

I have been having an intermittent scraping noise from this wheel so have taken a look and found the screw to be loose. No idea if this is causing the issue but hoping it maybe.

Thanks

 

[Burnerman]

It’s just a retaining screw that holds the disc onto the hub......before the wheel bolts take over!
It won’t cause your noise, ensure that the backplate is clear of the disc for that.
John

 

[Gibbies]

It’s just a retaining screw that holds the disc onto the hub......before the wheel bolts take over!
It won’t cause your noise, ensure that the backplate is clear of the disc for that.
John

Hi thanks

It normal for the brake pads to be so close to the disk?

 

[Gibbies]

The noise I get is a very slight grating noise. Only happens very occasionally.

 

[Burnerman]

Yes, the pads must kiss the disc as it spins.....only gently though!
This isn’t to say that your brakes don’t need a clean though, we can’t tell from here.
Check that there is a clearance between the disc and the backplate behind though, it can be bent out of the way if it’s too close.
John

 

[Burnerman]

The screw is actually a Torx.....you’ll need the correct driver to shift them as an Allen key won’t fit properly.
John

 

[JohnD]

You can get Torx bits to fit a socket set handle, if you have one.

Yours looks fairly small so a 3/8" set would probably do.

If you don't, a T-handle will enable you to exert more force than a screwdriver-type handle.

 

[carmanmemoranda]

Not always force that's needed.

A shock action may give a better result. Force often just chews the head or breaks it off.

You can ask me how I know if you want

 

[Burnerman]

I shock 'em with my impact gun.......every time.
John

 

[JohnD]

found the screw to be loose

No need for impact gun.

 

[Burnerman]

I guess those discs aren't original......I've never come across original retaining screws being slack.
Just half a twist with a driver after installation does it for me - with some ceramic grease in there too.
John

 

[freddiemercurystwin]

Hi thanks

It normal for the brake pads to be so close to the disk?

What's the other side (of the disc) like?

 

[Gibbies]

I guess those discs aren't original......I've never come across original retaining screws being slack.
Just half a twist with a driver after installation does it for me - with some ceramic grease in there too.
John

I bought the car with 16,000 on the clock so I’m presuming they are the original disks.

 

[JohnD]

They look surprisingly scored.

 

[Avocet]

I bought the car with 16,000 on the clock so I’m presuming they are the original disks.

How many miles does it have on it now? Those discs look fine to me, but there's quite a lip on the edge, which suggests that they might be getting close to their minimum thickness. As others have said, have a look at the other side of the disc and the other pad. Just because one pad is OK, it doesn't mean the other one is.

Also try to find out more about when it makes the noise. Is it when you brake? If so, is it when you brake gently or hard? Does it happen over bumps, or in right or left hand bends? Will it make the noise if you dip the clutch so you're just coasting? (Assuming it's a manual).