Question about 1998 Ford Explorer

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Whine/high pitch noise from under hood '00 Explorer

I have the same problem with my 2000 (actually one of many). It is only in the summer months. It does not start right away, only when the A/C has been on for awhile. When it is sitting idle like at a stop light, parked and I run in somewhere for a minute or two, it whines so loud everyone inside the store I stop at can hear it. Anyone talking to me on my cell can hear it. When I accellerate the noise goes away or minimizes quite a bit. It is EXTREMELY annoying. Along with the other problems this truck has, it would take alot to get me to buy another Explorer. Any ideas of what this problem is would be greatly appreciated.

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  • Ford Master
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Sounds like your tensioner and belt are both going bad together and need replaced. The tensioner pulls the belt tight to hold enough tension for the belt not to slip, but the belt once it has slipped gets "burned" or slick and slips anyway. When the A/C is engaged it has alot of pull on the belt and slips causing the sound most likely. When belt is off check other bearings for noise to make sure that is your only issue. If one starts to go the others may not far behind.

Posted on Jul 28, 2009

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