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Engine Noise


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I am experiencing a loud whistle on my RX 300 at initial morning startup. It lasts for 3-4 seconds and then disappears. Since that is the only time it occurs it is impossible to trace. I have checked for loose hoses, etc, and wonder if it could be belt or water pump noise. I have 102K miles and have had all required service done at Lexus but reside 2 1/2 houes from the nearest dealer. Any suggestions?

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Based on your suggestion I checked my service tickets and all belts have been replaced. I use belt dressing (spray) on my kitcar (Pinto 4 cyl) which makes noise on start up so I sprayed alittle on the Lexus AC/ALT belt and haven't had the nose since. Thanks a million!

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