[Shotimes] (OT) curb-impact damage to RWD

[James F. Ryan III]

JvO,

You could use a magnetic mount dial indicator ($20 to $200) to check the
runout of the hub face.  If the hub is nice and true, re-install the
disc and check the runout of it (or just replace it because as we know
the solid rotors are not forgiving when it comes to overheating).

Also, don't discount the parking brake.  Jeep Grand Cherokee's have a
similar drum brake inside of the disc hat.  If that little brake shoe
got bent it could be causing the drag and overheat, too.

To rule that out have you jacked up the rear end and rotated the rear
wheels with the parking brake applied and released?

Also, maybe the caliper mounting bracket got tweaked.

If you brought it to a shop I imagine they'd replace the rotor and
caliper (as SOP), and if the throbbing still existed they'd suspect the
caliper mount or the axle shaft.


>-----Original Message-----
>From: shotimes-admin@autox.team.net 
>[mailto:shotimes-admin@autox.team.net] On Behalf Of van Oss
>Sent: Friday, June 04, 2004 1:18 PM
>To: shotimes@autox.team.net
>Subject: [Shotimes] (OT) curb-impact damage to RWD
>
>
>I need help figuring out what's wrong with our Crown Vic.  My 
>16-year-old overcooked a corner last week, in the rain, spun 
>the car, and put the left rear wheel into a curb.
>
>The alloy rim is bent, no question.  We put a winter rim on to 
>see if there might be other damage.  It appears there is.  The 
>brakes now "throb" (like a warped rotor but worse) and the 
>left rear rotor gets very hot quickly, indicating drag.  Solid 
>rotor about 1/2" thick, BTW, and Crown Vics also have a small 
>cable-operated drum brake inside the rotor hat.
>
>What to do next?
>
>--- I'm thinking of removing the rotor, taking it into a parts 
>store, and asking them to check on their lathe whether the 
>rotor was bent.  Rotors are cheap.
>
>--- How would I know or test whether the caliper is damaged?  
>I suppose we could replace it to rule it out.
>
>--- The hub mounts to the solid axle with four bolts.  Is 
>there any way to check whether the hub, or the flange on the 
>end of axle, is bent?
>
>--- Or should I just put the winter tire back on, drive it to 
>a collision shop, and ask them to tell me what's wrong?
>
>We're not affluent enough to just hand the car to a shop.  TIA 
>for any help.
>
>Joseph van Oss
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