Date: Tue, 31 Oct 2006 11:15:17 -0500 From: Ben <jimnospamcom> Subject: Re: Stubborn Front Brake Rotor
Charles C. wrote: > Ben wrote: > >>Fred W wrote: >> >>>- Bob - wrote: >>> >>> >>>>On Mon, 30 Oct 2006 10:36:37 -0500, Ben <jimnospamcom> wrote: >>>> >>>> >>>> >>>> >>>>>I'm considering, drilling a small hole in the left half of the rotor >>>>>screw and try a screw extractor. Then maybe warm the disk up with a >>>>>torch and try hammering out again. >>>>> >>>> >>>> >>>>Well, I had some tips for getting it out... but it's too late for that >>>>:-) >>>> >>>>If you are sure that the screw is not holding it in, and you have >>>>removed the caliper, and you are replacing the rotor... here's what >>>>I'd do: spray some PB blast around the hub area. The only thing >>>>holding the rotor on is the rust at the center of the ring. Then put >>>>in your ear plugs and start whacking it with the 8 lb sledge around >>>>the outer edge as you rotate it. Eventually the rust will break free >>>>and it will come off. Hitting it on the edge (radially) may also help. >>>> >>>>If you are not replacing the rotor, strategy is the same - just use a >>>>wood block and be gentle. >>> >>> >>>Yep. I was going to say exactly what Bob said. Except to add that to >>>remove the small rotor screw, you should be able to drill off the head >>>by using a bit that is slightly larger than the screw thread diameter >>>but smaller than the head of the screw. Once you drill out all the >>>tapered part the head will fly right off. >>> >>>Once the head is gone you should be able to get it out with some vice >>>grips (after the disk has been removed) no problem. Just make sure to >>>juice it with PBblaster and let it soak a while. >>> >> >>Thanks guys! >> >>I'm off to get some Kroil, or/and PB and a bigger sledge. I'll try to >>get the complete screw out and I'll re-spray and let it sit overnight. >>Then, the sledge. >> >>I hope I will not end up replacing the whole hub! >> > > > You might :-) Why did you want to remove the rotor (disk) if you were > only changing the pads? As others said ... if the top of it broke the > rotor should come free quite easy and leave all drilling until after you > have the rotor off. > > What is the head of the screw on a 9-3 like. Pozidrive (spelling?) size > 1? if yes it would have needed an impact screwdriver like so > http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=37530 > > Use copper paste on reassembly. > > Good luck. > Charles > > > Hi Charles, Here's a snippet of the original post: "I'm doing rotors and pads on a 1999, 9-3, manual. The passenger side worked like a charm, everything came off nicely and went back together in no time. The driver side however is proving to be quite a dog. First, the screw holding the rotor would not come off. I lubed it, tapped it, used a manual impact wrench with the proper 5mm torx, would not budge." So, I was doing rotors from the beginning and I used a manual impact driver, but nevertheless thanks for the advice! Here's a link to a pic of the screw (mid-page, I believe): http://www.thesaabsite.com/93/93Brakes.htm Also, my WIS says it's a lock screw that should be tightened at 3 lbsft, so it's not a highly tightened screw, however it's location make is corrode easily etc..... So, I drenched the disk/hub/all openings in PB last night (gave it a few good taps for measure), and I'll try again tonight... see what happens. Lucky I have the 9-5 to drive around for now! Thanks, Ben
