Kostamojen Posted September 18, 2005 Share Posted September 18, 2005 Well I just finished the front brake install on my '78 and I have a big time problem... I got the brakes all bleed, that worked fine, have decent brake pressure. BUT when the car moves, its like a metal ochestra under my front wheels... MAJOR grinding. I know its because its new pads, and a new rotor and theres not alot of space there, but how in the heck can this be fixed or what is the problem??? Im totally clueless... Link to comment Share on other sites More sharing options...
75subie Posted September 18, 2005 Share Posted September 18, 2005 did you fully compress the pistons?i have never had this problem, but??? Link to comment Share on other sites More sharing options...
Kostamojen Posted September 18, 2005 Author Share Posted September 18, 2005 I compressed them all the way down to where they were even with the caliper body, or at least close to it. Link to comment Share on other sites More sharing options...
Snowman Posted September 18, 2005 Share Posted September 18, 2005 Bent gravel shield? Jack the car up, turn the wheel, and listen. It should become apparent quite quickly. Link to comment Share on other sites More sharing options...
Syonyk Posted September 18, 2005 Share Posted September 18, 2005 I've changed the brakes on a bunch of cars, and I have NEVER had grinding noises afterwards. Before, sometimes, but that's what backing metal on rotor sounds like, and that's why the brake job happened. Jack the front up, rotate the tires, and figure out what's causing it. -=Russ=- Link to comment Share on other sites More sharing options...
Kostamojen Posted September 18, 2005 Author Share Posted September 18, 2005 Bent gravel shield? Jack the car up, turn the wheel, and listen. It should become apparent quite quickly. Ill double check that fast. One of them did tweak a little when I was working on it. Link to comment Share on other sites More sharing options...
75subie Posted September 18, 2005 Share Posted September 18, 2005 are the brakes dragging, or is it all noise? Link to comment Share on other sites More sharing options...
Kostamojen Posted September 18, 2005 Author Share Posted September 18, 2005 Do the caliper shims require grease? Link to comment Share on other sites More sharing options...
Kostamojen Posted September 18, 2005 Author Share Posted September 18, 2005 are the brakes dragging, or is it all noise? Kind of both. I presume the noise is a result of the brakes draging, but there is a big difference between when I apply the brakes vs. when the car is just moving. Link to comment Share on other sites More sharing options...
Kostamojen Posted September 18, 2005 Author Share Posted September 18, 2005 Oh and its definatly not the dust shields, I got the wheels off again with the car in the air and im rotating the hubs and its definatly pad rubbing the disc. The pistons at this point are not all the way down. Link to comment Share on other sites More sharing options...
Snowman Posted September 18, 2005 Share Posted September 18, 2005 What kind of shape are the rotors in? I guess it's possible that if they're really screwed up it could cause a noise like this. Link to comment Share on other sites More sharing options...
Kostamojen Posted September 18, 2005 Author Share Posted September 18, 2005 Brand spankin new rotors. I just pressed the pistons down all the way to be sure, greased the caliper shim thingies, and basically re-did everything. Its even worse now... EXTREME metal on metal sound. Link to comment Share on other sites More sharing options...
hooziewhatsit Posted September 18, 2005 Share Posted September 18, 2005 Brand spankin new rotors. I just pressed the pistons down all the way to be sure, greased the caliper shim thingies, and basically re-did everything. Its even worse now... EXTREME metal on metal sound. did you push the pistons in, or screw them in? edit, does the '78 even have screw in pistons? Link to comment Share on other sites More sharing options...
Kostamojen Posted September 18, 2005 Author Share Posted September 18, 2005 did you push the pistons in, or screw them in? edit, does the '78 even have screw in pistons? Yes yes yes, I screwed them in, used Subjunkies design for a tool, worked great. Link to comment Share on other sites More sharing options...
JWX Posted September 18, 2005 Share Posted September 18, 2005 leave a bolt where it shouldn't be Link to comment Share on other sites More sharing options...
Kostamojen Posted September 18, 2005 Author Share Posted September 18, 2005 leave a bolt where it shouldn't be No, everything is exactly in place, I even re-did everything to be sure... Link to comment Share on other sites More sharing options...
75subie Posted September 19, 2005 Share Posted September 19, 2005 try driving it for 5 mins, see if they smooth out of heat up.i am kinda clueless??maybe you got pads or rotors for a newer sube by mistake? Link to comment Share on other sites More sharing options...
Kostamojen Posted September 19, 2005 Author Share Posted September 19, 2005 The rotors are the same, I checked. The pads are the same minus the fact they are new (IE have ALOT more material on them now) I cant drive it, its INSANE how loud it is. Like if a 1940's tank rolled down your street. Link to comment Share on other sites More sharing options...
pattiandruss Posted September 19, 2005 Share Posted September 19, 2005 I once changed the pads on a Dodge pickup, and put one side in backwards. It is quite noisy with the metal side of the pad against the rotor. Didn't hurt anything, I test drove it and pulled right back into the garage and turned that pad over. Embarrasing? Live and learn. Russell Link to comment Share on other sites More sharing options...
Kostamojen Posted September 19, 2005 Author Share Posted September 19, 2005 Cant put these in backwards Wont even work. Link to comment Share on other sites More sharing options...
NoahDL88 Posted September 19, 2005 Share Posted September 19, 2005 Jack the front of the car up, spin one wheel at a time and see if only one side makes a noise, then you've at least got it down to a side. Good luck Link to comment Share on other sites More sharing options...
Humble Nuto 53 Posted September 19, 2005 Share Posted September 19, 2005 maybe you got ceramic pads instead of semi-metalic? Link to comment Share on other sites More sharing options...
cap86 Posted September 19, 2005 Share Posted September 19, 2005 Wrong pads? Link to comment Share on other sites More sharing options...
Turbone Posted September 19, 2005 Share Posted September 19, 2005 Check your e-brake, it might be on a little. Link to comment Share on other sites More sharing options...
Kostamojen Posted September 19, 2005 Author Share Posted September 19, 2005 Check your e-brake, it might be on a little. Its not on, I gave it several yanks several times to be sure. The pads seem to be right, unless they have too much material, they are metal masters. I spun both brakes with the wheels off, they both do it, but one more than another. Link to comment Share on other sites More sharing options...
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