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Tech Bulletin On Calipers

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Old May 30, 2005 | 09:59 AM
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I have suffered on my Tib and on my wife's Elantra form fron caliper noise, it's like a heavy rattle on uneven roads. I have searched Webtech (which I can't access right now due to stupid firewall poilicies at the office) and there's a technical note on how to solve this. Aparently, first cars produced had both caliper guides made of steel completely and the "solution" is a kit so the dealer can replace that caliper guide abuy a newone that has a rubber part on the end, plus adding some togher grease.

Here is the question, on that technical note they talk about "guides" in plural, and here I have seen both my cars have the newer rubber part just on the top guide, while the bottom one is just plain steel. Are both guides the same? Can I just replace both upper and lower guides by the newer piece with the rubber part to try eliminate the noise completely? I am guessing the dealer has changed that only on top like "to save" some money. Please brake gurus your answer will help me a lot.
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Old May 30, 2005 | 10:44 AM
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Are you talking the "pins" that the caliper bolts to that then slide in and out of the mounting bracket?

If that is a yes, they are interchangable. I have two tops on one of my rear calipers due to a stripped bolt.
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Old May 30, 2005 | 11:27 AM
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:unsure:
Well, I don't know, I know them as caliper bolts, and they are actually the ones that keep the two pieces of the caliper together. On the Webtech they are referred as Caliper Guides. Another way of putting it is: They are the two axes on which the movable part of the caliper (outter edge) slides in or out.
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Old May 30, 2005 | 01:02 PM
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Not trying to get off subject but on my pass, side I get a clicking sound at even intervals pretty much a constant sound. Is this the noise you are speaking of? I noticed it after I put cross drilled and slotted rotors on. Also had a bad hub bearing on the same wheel I hear the noise from that I've since fixed.
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Old May 30, 2005 | 02:22 PM
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No, I understand your noise could be made by something turning (hence the intervals) but the noise I referr to is simply vibration noise, you get onto an unpaved road (like some beach entrances here, really short distances like a mile or so) and there it's very noticeable, but on pavement you don't notice anything.
If you want to find what I am talking about, please visit Hyundai Webtech and find on the TSB tab a title called "Elantra and Tiburon caliper noise" or something like that. You will know exactly what I am talking about.
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Old Jun 1, 2005 | 06:30 AM
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Yes, those caliper guide rods are interchangable. In Ukraine upper and lower guides has same price (about $4.2 for one guide).

If you have dangling (ticking) sound on bumpy road and if it goes away if you press brake pedal - try also to change metal springs, that is above and below the pads and hold pads in the bracket. I had that noise and changing guides didn't help me, but installing new pads with that springs helped.
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Old Jun 1, 2005 | 08:42 AM
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Thanks Dimitry, that's new advice to me. Do you have the part number for the springs at hand?
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Old Jun 1, 2005 | 09:06 AM
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When I bought OEM front brake pads, springs were included. I don't know if they are sold apart.

You can also try to bend a bit your springs that you have now. It could help as well.
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Old Jun 1, 2005 | 09:14 AM
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I think I am getting lost here, what srpings are you talking about? I thought you meant the caliper springs, I don't remember a pad spring... or are you talking about the wire that goes into the pad itself? One long wire twisted on the middle?
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Old Jun 1, 2005 | 09:27 AM
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here is pic of rear caliper, red arrow point at that metal spring (maybe I name it wrong).



That noise can be produced from pads that are moving in the bracket (carrier). So that two metal springs are in the bracket (carrier) and prevent moving of the pads.
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