1997 Ford Explorer howling noise from resevoir

1997 FORD EXPLORER
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C2MAN
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Noises problem
1997 Ford Explorer 4 cyl Two Wheel Drive Manual 105k miles

When the engine is hot (normal temp) a howling sound comes from the resevoir this only happens when the car is up tp temp
Jun 14, 2009 at 9:19 AM
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TECHS IN
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Normally a noise coming from the reservoir indicates excessive pressure from water temperature. I would suggest you use a temperature thermometer to check the actual temperature of the water in the reservoir. Please keep in mind safety at all time.
Jun 16, 2009 at 2:13 AM