Question about 2004 Toyota Sienna

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When starting our 2005 Toyota Sienna with the air conditioner on the belts squeal, how do I fix this problem? How difficult is it to change the belt?

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There should be an idler pulley nearby to your aircon compressor, with an adjusting bolt to tighten your belt. If the belt is tight and still squeals, there are allsorts of weird and wonderfull things that are applied to them to stop squealing. Vaseline won't hurt the rubber but it will stop the squealing...hope this helps.

Posted on Sep 13, 2009

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TRY TIGHTENING FIRST OR TURN AC ON AFTER IT IS RUNNING IT IS A TRANSVERSE ENGINE SO IT DEPENDS IF YOUR UP TO THE CHALLENGE

Posted on Sep 13, 2009

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1 Answer

Ps belt


Need new belt or look for belt dressing in an auto parts store. Might not be recommended for serpentine belt.

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Hello and thank you for asking me, the most common cause for this is a loose/slipping power steering belt so it should be inspected and adjusted or possibly replaced. This engine has two drive belts, one for the alternator and a/c and another one for the power steering, if one is worn or loose it's best to replace both belts. Let me kno wif you have any more questions or additional info.

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Makes a squealing noise when i start it sometimes and sometimes while i am driving it it does too, it is a 2000 toyota sienna


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Heating/Air Conditioning Unit makes a squealing noise upon start up. Can this just be a loose belt?


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Squealing sound every time I start my van


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2 Answers

Help! Air conditioner causes squeal soon after turned on


The ac is belt driven, If one of the belts are loose it will make a squealing noise. Turning on the air puts more strain on the belts. If this is the case all you would have to do is tighten the belt or belts. This would probably take a service tech just a few minutes. Probably under $100.00 dollars..........

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