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Brakes Pulsing, Again. At a Loss 900 1993

posted by  hip82 on  Sat Nov 6 02:07 CST 2004
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last visit: Thu Jul 12 10:12 CST 2001
[RELATED]

1993 940 NA
Single Piston Girling

I've recently beginning to go through my third set of rotors due to pulsing. They've only been on for about 1500 miles, and I can tell that they will get bad again. Here is the history.

July 2003 - 130K replaced rotors/pad Zimmeman/Volvo. Also replaced struts, strut rod bushings (poly), BJ's and tie rods.

Aug 2003 - replaced strut rod bushings with rubber - did not like poly. Also replaced left front hub due to a broken indexing stud.

February 2004 - 136K New Zimmerman rotors/Volvo Pads - New caliper hardware (flat shiny pieces) Cleaned caliper slide pins

October 2004 - 142K New Brembo rotors, PBR pads, New remanufactured Volvo Girling calipers, new front brake hoses. Now at 144K, noticing the early beginning of what will be bad pulsating again in a few thousands miles.

What could I be doing wrong? What should I look for? Could tires be the source? I have Kumho ecstas, and sometimes they feel a little rough, like sidewall cracking) I think I got these tires about the same time I started going through rotors (130K), but I don't see the connection between tires and warping rotors. I'm very careful about the wheel stud torque. I keep it at 65 - 80 ftlbs.

Someone sugggested that strut rod bushings going bad could feel like warped rotors, but I doubt it in this case since they are relatively ew, and the pulsation goes away when I replace pads/rotors.

I'm about ready to sell this car do to it's repeated brake problems, slight radiator leak, AC leak. It just always seems to want maintenance. Next T-belt at 150K, she's going to need new front seals to, which I can do.

Thanks, Tom





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