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Steering wheel pump *whining steering wheel when turning

I had a whine sound from my 2012 370Z (35,000 miles) that increased with RPMs that originally sounded like a bad alternator. Dealer changed alternator - no improvement. Then the

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Old 02-24-2017, 01:46 PM   #12 (permalink)
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Default whine from power steering pump

I had a whine sound from my 2012 370Z (35,000 miles) that increased with RPMs that originally sounded like a bad alternator. Dealer changed alternator - no improvement.
Then the idler pulley and tension pulley and belt was changed - no improvement.
They then replaced the power steering pump and the noise went away - but only for 2 months and about 1500 miles.
After a week of investigating, I found a TBS (ITB12-035) that only applied to the Infiniti 35 that stated a bad power steering reservoir could cause a whine sound.
Today, the Dealer replaced the reservoir and the sound is gone.

Something you may want to check. The power steering fluid in my original reservoir looked like it was boiling when the engine was running.

The Nissan tech stated they would add the 370Z to this bulletin, but who knows.
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