Question about 1998 Toyota 4Runner

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4Runner has high humming sound

My 4Runner is making a high humming sound from the engine area. Can't figure out what it is. Just started doing it after I washed my engine. I'm wondering if water got in to something it shouldn't have, or it's just a coincidence.

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  • dshanebrook May 11, 2010

    was this when your idling or while your driving? mine was the ac idler pully on the front bottom of the engine...the bearings were shot.

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My 4Runner is making a high humming sound from the engine area. Can't figure out what it is. Just started doing it after I washed my engine. I'm wondering if water got in to something it shouldn't have, or it's just a coincidence.

Posted on Oct 31, 2008

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Check the front differential for fluid.

Posted on Oct 04, 2008

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