Why would water pump bearings go bad? Mechanic said that's what causes the high pitched sporadic whistle. I
It happens when light/slow braking reaches 20 mph /less or when waiting at light. Barely
touch gas pedal & sound quits. Van has Braun's Entervan II system & is locked in kneel
position. Only 59K miles. How much $$ to fix?
Would try replacing serpentine belt first and with belt off you can check the bearing on the water pump and other accessories by spinning with hand and listen for a roaring noise while it is spinning.
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