aharres Posted November 6, 2016 Report Share Posted November 6, 2016 I've got a 1999 V70 T5 that I've done the big brake upgrade to. Porsche 993 TT calipers up front, P2R calipers in the back, and P2R 330mm rotors all around. I've been having an issue getting my parking brake adjusted correctly. Besides the fact that it's a huge pain in the ALL GLORY TO THE HYPNOTOAD and requires removing the rotor to adjust the "star wheel", I cannot get the parking brake adjusted in a way where the shoes aren't providing noticeable resistance to the drum and preventing the rotor from spinning even somewhat freely. I have on hand a set of oem volvo shoes (made in china), a set of bosch shoes, a set of new textar shoes, and my old set of textar shoes. The weird thing is my old textar shoes don't rub. I tighten the star nut probably 40 "clicks" and everything seems dandy, except for the fact that the parking brake only holds going forwards, not backwards. But if I try any of these other new pads that I bought, it's all the same story. If I loosen the star nut on the top spreader all the way and mount the rotors, they still rub quite a bit and will stop the rotor before one revolution if you try to spin it by hand. Not only that, but I pretty much have to tighten the hand brake adjustment all the way and even then there's only resistance in the handle at the very top of the travel length. Has anyone else had issues with this? How many clicks do you normally tighten the star nut? Link to comment Share on other sites More sharing options...
aharres Posted November 7, 2016 Author Report Share Posted November 7, 2016 I think I found the issue. My rotors are the centric high carbon steel rotors (not drilled or slotted) and it seems like the lip on the drum is actually rubbing against the side of the friction material on the shoes (the side facing outside the car). Gonna go with OEM to see if it solves the issue. If it does, I guess I wouldn't recommend the centric rotors. Link to comment Share on other sites More sharing options...
Tightmopedman9 Posted November 7, 2016 Report Share Posted November 7, 2016 Are you sure that the cables are still good? In my experience if the cables have internal corrosion they won't allow enough slack on the brake shoes to not rub. A bit of a time consuming test, but you could pull the parking brake cable out from the mechanism and see if the shoes still rub. Link to comment Share on other sites More sharing options...
aharres Posted November 7, 2016 Author Report Share Posted November 7, 2016 I'm almost certain they're still good. No cracks in the cable liners and there's virtually no rust under the car. The parking brakes worked fine before the bbk swap. I also noticed that the rotor would spin freely until I tightened down the wheel alignment pin. So I took a sharpie and drew a fat strip going across the braking surface. I mounted the rotor, tightened the wheel alignment pin and spun the rotor around a few times. When I took it off I found that the sharpie on the side of the lip was completely worn off. I also noticed unusual wear on the parking brake shoes I had been using. It has cut away at the friction material on the side facing outside the car. I ordered brembo rotors so we'll see if they're any different, or if I'm just going to have to get a shop to machine the lip. Link to comment Share on other sites More sharing options...
aharres Posted November 29, 2016 Author Report Share Posted November 29, 2016 I had a guy machine the lip on the inside of the drums and everything is working excellently. Not sure why I'm the only one who has had this issue. Link to comment Share on other sites More sharing options...
dougy Posted December 4, 2016 Report Share Posted December 4, 2016 On 11/6/2016 at 10:19 PM, aharres said: I think I found the issue. My rotors are the centric high carbon steel rotors (not drilled or slotted) and it seems like the lip on the drum is actually rubbing against the side of the friction material on the shoes (the side facing outside the car). Gonna go with OEM to see if it solves the issue. If it does, I guess I wouldn't recommend the centric rotors. thats is correct...you can take the parking brake shoes cleverly out and use belt-sander to remove the sharp edge of it off along the length of each the PB shoes and continue to use centric rotors next time again and again, instead of machining the new set of centric rotors again or buy any rotors without worrying if you will have to machine them. Link to comment Share on other sites More sharing options...
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