Loud hamster wheel squeal noise - help - Toyota Yaris Forums

Vinceb · 03-11-2011, 09:15 AM

Agree with "Yaris2010RS. Check the tension of the serpentine belt, is there a tensioner pulley on the yaris or is tension kept on the belt from the tightness of the alternator? I haven't done enough work on it as of yet and don't have any manuals for it. anyway, if it has a tensioner pulley, that could be the problem. depending on how bold you are, back off the tension on the belt, remove it, and spin each pulley freely to see if they squeal. if not that, crawl under the car and look for loose plastic splash shields, or the metal exhaust shield. Other than that, not sure what it could be without seeing it.

Since the Yaris has a timing chain, I don't think you'll mess up the timing by removing the belt, but look for TDC (top dead center) marks on the pulleys, if they are there, you will have to re-align before putting the belt back on. this could be alot of work for the cramped engine compartments of the Yaris.

WeeYari · 03-11-2011, 09:20 AM

Quote:

Originally Posted by Vinceb

is there a tensioner pulley on the yaris

No, there unfortunately is no tensioner

Quote:

Originally Posted by Vinceb

I don't think you'll mess up the timing by removing the belt, but look for TDC (top dead center) marks on the pulleys, if they are there, you will have to re-align before putting the belt back on. this could be alot of work for the cramped engine compartments of the Yaris.

Worrying about TDC is not an issue

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03-11-2011, 09:15 AM	#1
Vinceb Drives: 2008 5 Speed Sedan Join Date: Jan 2011 Location: Nova Scotia, Canada Posts: 77	Agree with "Yaris2010RS. Check the tension of the serpentine belt, is there a tensioner pulley on the yaris or is tension kept on the belt from the tightness of the alternator? I haven't done enough work on it as of yet and don't have any manuals for it. anyway, if it has a tensioner pulley, that could be the problem. depending on how bold you are, back off the tension on the belt, remove it, and spin each pulley freely to see if they squeal. if not that, crawl under the car and look for loose plastic splash shields, or the metal exhaust shield. Other than that, not sure what it could be without seeing it. Since the Yaris has a timing chain, I don't think you'll mess up the timing by removing the belt, but look for TDC (top dead center) marks on the pulleys, if they are there, you will have to re-align before putting the belt back on. this could be alot of work for the cramped engine compartments of the Yaris.