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Old 11-04-2017, 09:53 AM   #37
dogsridewith
 
Drives: 2007 2-door hatchback
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Toyota Yaris serpentine belt tighten tension

Quote:
Originally Posted by Randy_84 View Post
I also have a squealing in my 2010 yaris rs liftback. When i turn the air condition on it squeals for about 25 seconds then stops. If i driving with the a/c on and i have to stop, as I shift the gears down, the squeal returns. Even at times when drive to a spot and then put the car in reverse it squeals. The belt has been changed before, but it still kept the noise. I just want to know if the belt is tensioned, would that solve the problem.....any feedback?
Should have been re-tensioned the first time it squealed for 25 seconds. Or 3 seconds. And if that doesn't solve, then look for driven items seizing up...like A/C compressor. Does it chirp or squeal at startup w/ the A/C off?
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Old 11-06-2017, 06:35 PM   #38
mr_robot
 
Drives: Yaris
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I fixed mine over the weekend. Just loosened both the top and bottom bolts, used a prybar wiith one hand and re-tightened with the other pulling it as hard I could and done.

No more squeaky belt.
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Old 11-07-2017, 10:32 AM   #39
dogsridewith
 
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Serpentine belt tension adjustment Toyota Yaris

Overtightening a serpentine belt destroys driven components and idler bearings.

Last edited by dogsridewith; 11-09-2017 at 09:09 AM.
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Old 11-08-2017, 11:17 AM   #40
Randy_84
 
Drives: 2010 yaris rs manual
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Quote:
Originally Posted by dogsridewith View Post
Should have been re-tensioned the first time it squealed for 25 seconds. Or 3 seconds. And if that doesn't solve, then look for driven items seizing up...like A/C compressor. Does it chirp or squeal at startup w/ the A/C off?
The A/C compressor was change like a year ago. It chirps or squeals occasionally when at startup and when the A/C is turned on it chirps as well. There are times when i startup, leave the car running for 60 seconds and then turn the A/C on and I get no squeal. It is suppose to get look at within the coming weeks, so hopefully i would get the problem fixed.
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Old 11-08-2017, 12:39 PM   #41
mr_robot
 
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Mine has been quite since.
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Old 11-08-2017, 12:55 PM   #42
white89gt
 
Drives: 2007 Yaris
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As soon as I went to the Scion 100 amp alternator, mine has quit squealing. The Scion alternator uses a de-coupler pulley, so I think that has something to do with it.
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Old 11-08-2017, 06:26 PM   #43
06YarisRS
 
Drives: 2006 Yaris RS
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Check out this 'interesting' video...

https://www.youtube.com/watch?v=HRrVMtyIqIY

When I first got my car, it squealed badly, partially because the previous owner put belt dressing on it. I can confirm that delaying ignition does work, at least for belts that squeak when the engine is first started. It did on mine anyway.
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