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08-31-2016, 09:30 AM | #1 |
Drives: 2008 Yaris Hatchback Join Date: Feb 2014
Location: Jacksonville, FL
Posts: 37
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Belt Squeeling like a Mofo
Hello
My belt squeals. Here is what my observations are: -Replaced Water pump & belt a few years ago -Replaced Alternator 2 months ago - Belt squeals when AC is on - I live in FL...AC button is always on - With the hood up, I can see that the belt, when squealing, is not moving. - Belt does not squeal when the AC light is off most of the time. If it does, its for 2-3 seconds only. - AC does blow cold air, really cold, but it takes a minute or so of the squealing and then not squealing for the air to get cold I am thinking that its the AC unit that is causing this. Its an uneducated guess because I've replaced 2 of the 4 pulleys/sheaves already. Thoughts? Things I should try? Am i on the right track? Thanks! James Last edited by gumby002; 08-31-2016 at 09:44 AM. |
08-31-2016, 09:36 AM | #2 |
Drives: 06 Polar White 5dr, 13 Soul 4u Join Date: Oct 2008
Location: Georgetown, Ontario, Canada
Posts: 5,740
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Simple question first since it is not listed above. Have you replaced the belt? Could be getting extremely glazed if you have not.
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08-31-2016, 09:43 AM | #3 |
Drives: 2008 Yaris Hatchback Join Date: Feb 2014
Location: Jacksonville, FL
Posts: 37
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yeah, forgot to add that. The belt was replaced when the water pump was replaced
And I've sprayed the belt with belt dressing when the squealing really got bad thinking that maybe the belt wasnt gripping the new alternator sheave. |
08-31-2016, 12:25 PM | #4 |
Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008
Location: nj
Posts: 4,790
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I would loosen the belt so I could turn the pulleys by hand. Perhaps one of them isn't freely turning?
Good luck!
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Synthetic Oil: Its All In Your Head |
08-31-2016, 12:57 PM | #5 |
Drives: 2007 2-door hatchback Join Date: Jul 2016
Location: USAnotCA
Posts: 750
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serpentine belt tension Yaris
simpler question--did you check and/or raise belt tension?
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09-10-2016, 01:45 PM | #6 |
Drives: '08 Yaris Sedan, Aero Package Join Date: Oct 2008
Location: Burlington, Ontario, Canada
Posts: 1,720
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I had good luck with Gates belts when running my previous Yaris with the Blitz S/C.
My current stock Yaris needed a belt and I put on a Continental belt. It seems to stretch constantly. Every month it will start squealing at start up with the AC on. Switch of the a/c and it stops and fine later once warmed. I need to tighten it monthly to resolve this issue. Reference marks I put on the alternator arm each time show that it's the belt growing, not slipping adjustment. No more Continental belts in the future for this guy!
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TRD Upgrades: 18" Wheels wrapped in 215/35/18 PZero's, Sportivo Shocks/Struts, Lowering Springs, Swaybar, Axle-Back Exhaust, Oil Cap, Rad Cap, Signage. Aftermarket Goodies: Piggies SS, K&N Drop-In, Blitz S/C, DC Header, NST Pulley) Toyota Options/Accessories: Sport Pedal Covers, Sport Shift Knob, Ipod Interface, Summer Mats, Winter Mats, Cruise Control, Auto-Dim Mirror, Echo steelies with winter boots. |
09-10-2016, 04:47 PM | #7 |
Drives: 2007 2-door hatchback Join Date: Jul 2016
Location: USAnotCA
Posts: 750
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Yaris serpentine belt tension adjustment match mark
Belt on new-to-me 2007 seemed so tight I match-marked the setting and loosened it some. Still no squeal.
MUSKOKA800's keeping it at incipient squeal will be best for various accessory bearings...one of those owner-mechanic advantages, where the shop has to overtighten to deal with the stretch. |
09-10-2016, 05:38 PM | #8 |
Drives: '08 Yaris Sedan, Aero Package Join Date: Oct 2008
Location: Burlington, Ontario, Canada
Posts: 1,720
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Yes, I just keep adjusting it about 1/8th inch at a time. Just enough to silence it. Certainly don't want to trash the alternator or water pump bearings due to extreme belt tension.
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TRD Upgrades: 18" Wheels wrapped in 215/35/18 PZero's, Sportivo Shocks/Struts, Lowering Springs, Swaybar, Axle-Back Exhaust, Oil Cap, Rad Cap, Signage. Aftermarket Goodies: Piggies SS, K&N Drop-In, Blitz S/C, DC Header, NST Pulley) Toyota Options/Accessories: Sport Pedal Covers, Sport Shift Knob, Ipod Interface, Summer Mats, Winter Mats, Cruise Control, Auto-Dim Mirror, Echo steelies with winter boots. |
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