Wednesday, October 31, 2007 - 12:03 am, by: Barry Precious(Barryp)
I have heard a knock when first braking at times and suspected loose calipers, but when I took the wheel off I noticed what was causing the noise. The wheel studs are loose in the brake disk. You can see how the studs can wiggle around in the disk
So I thought that maybe the bolts were missing which would go through to tighten the disk to the hub.
But after removing the caliper and disk I noticed there isn't a corresponding hole on the hub for the disk to fasten to.
I checked both front sides and they are the same... So now I am lost, what holds the brake disk onto the hub with the studs centralized?
Wednesday, October 31, 2007 - 06:04 am, by: Ben Lipman(Ben12a)
Yeah Barry,
It threw me for a loop when I first discovered it also. After doing pretty much what you've done I decided that if Mr Toyota designed it that way it must be OK.
Moving onto reasoning (guessing) territory maybe it allows for expansion and contraction without warping, or something like that.
Wednesday, October 31, 2007 - 03:43 pm, by: Cara Joseph(Carasky)
just an idea to check if the wheels have the hub rings that are need to keep the wheel center as that maybe the case of the rotor making a noise due to it being not located to center.
Hub rings can be obtained from any tyre place for your wheels..
Wednesday, October 31, 2007 - 03:53 pm, by: Cameron Spencer(Dokah)
Yeah, this is a pretty common way of doing things (for jap cars at least). Skylines are the same which is great cause its so damn mechanic friendly in comparison to the alternative. (Like Hyundai's.. **shudder**)
Wednesday, October 31, 2007 - 04:40 pm, by: Barry Precious(Barryp)
Cara - I have no idea what hub rings are? Can they be seen in my photos above? The brake disk does sit in the center of the hub - no problem, but the studs are not tight in their holes and so the disk can turn slightly forwards and backwards...
If the car was designed like this I am really surprised because if your wheel is a bit loose and you apply emergency brakes there's a chance the brake disk could shear off the wheel studs and would loose your wheel altogether!!!
Then again, in an emergency, I wonder what stops quicker a soarer with ABS or a soarer with no wheels
Wednesday, October 31, 2007 - 08:59 pm, by: Cameron Spencer(Dokah)
Barry, the hub rings are the inserts that tyre monkeys use to adapt a wheel to a hub that is smaller so that the wheel can benefit from the extra support provided by the hub center. If your wheels are standard u wont have them cause the wheels where designed for the hubs. As for the studs snapping, they arent really designed to withstand shearing forces irrespective of rotor design. They're only supposed to create a clamping force which is in turn used to transfer the torque.
Thursday, November 01, 2007 - 04:55 pm, by: Barry Precious(Barryp)
Would it be possible for Don to maybe post an exploded view of the hub showing the studs etc on the hub. I have noticed that the brake disk has a chamfer on the stud holes on the hub side of the disk which should should centralize the studs in their holes. I have standard rims but maybe the studs are not standard because they don't have a chamfer to match the brake disk?
Don Bagnall Moderator New Zealand I have WAY less Soarers than Hayden :-(
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