knocking noise when belt tensioner is engaged
There is a belt tensioner that operates intermittently (at the same time that the electric cooling fan is activated). Whenever the belt tensioner tightens the belt I get a knocking noise.
Any idea what it might be?
sounds as if the tensioner is just freezing up and should be replaced, can you move it freely with a wrench back and forth if not the preload spring is worn out and or rusty.
It could the A/C compressor clutch engaging.
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