Question about 2004 Toyota Sequoia

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Whistling noise coming from engine compartment on 2004 toyota sequoia

Trying to troubleshoot where the whistling noise is coming from in engine compartment, thinking it might be a bad or wore waterpump, but need to know some signs or indications.

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  • Anonymous Dec 29, 2008

    I have the same issue with 2005 Sienna. I suspect a belt, how often does one need to replace belts?

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How to replace belt idler pulley on 2002 seqouia

Posted on Feb 09, 2009

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Troublkeshoot possible noisy idler pulleys, if they are OK, remove the plastic cobers & check for a noisy timing belt tensioner pulley. Water pumps rarely "whistle"; they grind. But, if you see any evidence of leakage at the weep hole on the water pump impeller shaft, replace the pump regardless. Might as well replace the timing belt whilst you are there, too.

Posted on Sep 09, 2008

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