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Engine Whine On Accel/Decel In Neutral Or Drive

 
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Old 13 Jan 2014, 03:41 pm
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Default Engine Whine On Accel/Decel In Neutral Or Drive

I could really use some advice! This ones got me scratchin' my head... I have a 2003 base PT, non-turbo, auto transmission, w/air conditioning, 121,500 miles and well maintained (by me).

Especially on cold days, I hear an engine whine that increases in pitch & volume when accelerating or decelerating no matter if the transmission is in drive or neutral cruisin' down the highway at any speed or stopped at a traffic light. The "whine" is always there.

Sound does NOT change when turning the steering wheel, ONLY when engine rpm's change. It sounds louder inside the cabin than outside and seems to be coming from the passenger side of the engine compartment.

If I shut the engine off while coasting in neutral, the noise stops.

Alternator works electrically as it should (although the belt squeals for a few seconds on cold start now and then), power steering works great with no noise, automatic transmission shifts properly in all gears, no trouble codes registered in ODBII.

The "whining noise" does not at this time effect engine or transmission performance. It's been doing this for about 5 months. It gets no better or worse. I've checked this forum repeatedly but can't find an answer.

Thanks in advance for any advice offered.
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Old 13 Jan 2014, 04:16 pm
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Location: Pensacola Florida
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Default Re: Engine Whine On Accel/Decel In Neutral Or Drive

if the belt squeals when first started that is the first thing I would change . while the belt is off check the front bearing in the alternator and go from there. the best tool I have found for finding a whine is a mechanics stethescope. its a much used tool and only cost around $5.00
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Old 13 Jan 2014, 05:05 pm
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Default Re: Engine Whine On Accel/Decel In Neutral Or Drive

Thanks! I'll definitely check it out...
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