my 2000 jeep grand cherokee larado

2000 JEEP GRAND CHEROKEE
162,000 MILES • 6 CYL • 4WD • AUTOMATIC
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JOHN BURCH
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my 2000 jeep grand cherokee larado started knocking its still runs with no problem but its knocking and when give it gas the knocking has a slite screaching noise with it what would cause this and how do i fix it
Aug 12, 2011 at 11:27 PM
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CARADIODOC
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Check the vibration damper to see if it's loose. That will also cause the belt to slip and squeal.
Aug 12, 2011 at 11:47 PM
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JOHN BURCH
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ok but whats causin it to knock? it only does it when idling, and it stops after i get into 3rd.
Aug 13, 2011 at 1:11 AM
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CARADIODOC
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A loose damper will move up every half revolution due to the belt tension pulling up. That makes a real loud knocking noise.
Aug 13, 2011 at 5:16 AM