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What to Do When the Brake Caliper Makes Metal Clanking Noises?

2 Answers

BriannaFitz

07/28/25 8:52pm

Remove the two caliper pins on the brake pump and apply grease, or replace all non-rubber caliper pins with rubber ones. Below is an introduction to brake calipers: 1. Overview: A caliper is a tool for measuring length, categorized into non-dial calipers and dial calipers. External calipers are used to measure the outer diameter of a cylinder or the length of an object, while internal calipers are used to measure the inner diameter of a cylindrical hole or the width of a groove. 2. How to Use Calipers: For external calipers, place one measuring surface against the end of a steel ruler and align the other measuring surface with the desired measurement mark, ensuring both surfaces are parallel to the ruler. The method for using internal calipers is similar, except that the end of the steel ruler must rest against an auxiliary plane, with one foot of the internal caliper also against this plane.

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LorenzoMarie

08/12/25 1:35am

I recently encountered a similar issue - the caliper making metallic clanging noises was truly annoying, sounding like someone was hammering on iron blocks. After inspection, I found it was either the brake pads worn to their limit or debris like small stones stuck in there. Typically, when the friction material on brake pads becomes too thin or completely gone, the metal backing plate contacts the rotor directly, causing that noise. Another possibility is rusted caliper guide pins, making the piston movement less smooth and producing clanging sounds. Warped or scored brake rotors could also be the culprit. What I did was first drive to a safe spot, turn off the engine, then attempt simple checks like peeking through the wheel spokes to inspect pad wear or gently wiggling the caliper with tools to check for looseness. But it's better not to tamper too much yourself - the braking system is too critical, so just take it directly to a shop for proper disassembly and inspection. The mechanic warned that ignoring this could lead to brake failure, which is extremely dangerous. Remember to regularly check brake pad lifespan - at least glance at them every 20,000 km or during oil changes - to avoid such troubles.

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