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Old 02-25-2023, 11:42 PM   #1
Drives: 2009 Yaris Sedan
Join Date: Jun 2015
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Question Have engine knocking noise, assume it's lifters, but...

When the serpentine belt squeals the knocking noise disappears. Is that normal? 2010 Toyota Yaris.
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Old 02-27-2023, 06:56 AM   #2
Drives: 2010 yaris 3 door hatch
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Location: Sheboygan Falls, Wi.
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Take the belt off and retry.
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Old 02-27-2023, 07:25 AM   #3
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Drives: 2009 Base Hatch 2 Dr Auto
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With the belt off, check all the pulleys for the water pump, air, conditioner, and alternator for play side to side.

Good luck and tell us what happens!
Synthetic Oil: Its All In Your Head
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