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Why is the clutch making an odd noise in my 2015 Mazda BT-50?

Asked by Wayne

The clutch makes a noise when the pedal is out and in neutral in my 2015 Mazda BT-50, what could the issue be?

Answered by CarsGuide

11 Sep 2020 David Morley

The most common cause of a noise like this is likely to be a worn throw-out bearing, also known as a release bearing. Like most bearings, this component is designed to allow interaction between a moving surface (in this case the clutch which is turning at engine speed) and a stationary one (the clutch fork that physically disengages the clutch when you stand on the clutch pedal).

If this bearing becomes contaminated, rusty or just plain worn out, it can begin to emit the sort of sound you’re hearing. Why doesn’t it do it when the clutch pedal is pressed? Because the springs in the clutch are loading the bearing and taking the wear (or slack) out of it. When you release the clutch, the bearing relaxes and is free to make its noise again. Sometimes the reverse is true, and depending on where precisely the wear is located, the bearing makes the most noise when it’s loaded by the clutch springs. Either way, it’s a gearbox-out job, but beyond that it’s not a difficult task for a workshop.

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