Introduction
Some owners report experiencing a metallic “clunk” noise when lightly tapping the brake pedal or applying the handbrake while stationary, or when initially braking in reverse.
Problem
A metallic clunking noise occurs when applying the brakes, especially when stationary, or when reversing. This noise is often described as similar to tapping steel with a small spanner.
Possible Causes and Solutions
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Pad Knock-off/Pad Clearance: The noise could be the normal movement of the brake pads within the caliper due to designed clearance. This clearance prevents binding when the pads expand due to heat.
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Missing Anti-Rattle Shims: SOLUTION: Check if anti-rattle shims are installed on the brake pads. If missing, install new shims. The absence of these shims can cause excessive pad movement and noise. Note: Some aftermarket brake pads, such as Bendix 4WD, may eliminate the clunk even without shims.
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Worn/Stuck Pads: Pads may be worn unevenly, causing them to get stuck within the calipers. Ensure the pads can move freely within the caliper.
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Wheel Bearings: Although less likely to cause a clunk only when braking, check wheel bearings for excessive play. Jack up each wheel and rock it from top to bottom to check for movement.
Relevant Parts
- Brake pad anti-rattle shims.
- Bendix 4WD brake pads (mentioned as a potential solution to the noise in one instance).
This technical summary was auto-generated based on recovered archives. Do not rely on its factual accuracy. Refer to the original thread. Source: View Original Conversation
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