2002 B6 sounds like a wind up toy

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Nov 12, 2014 | 03:06 PM

Drew.young1980

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2002 B6 sounds like a wind up toy

I have been having an issue lately with my 2002 A4 3.0. It sounds like a wind up toy when the engine revs. Drives fine, just sounds funny. Any thoughts on what it might be? Thinking maybe tensioners, but not sure.

Nov 12, 2014 | 06:06 PM

JDJ

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Not sure what you mean my wind up toy, but I think a bad tensioner would emit a high pitched squeal.

Nov 13, 2014 | 04:15 PM

ECS Tuning

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From: Wadsworth OH

Could just be your cooling fans. Or a Secondary Air Injection pump. When these start to go bad they produce a whining sound.

Jason

Nov 14, 2014 | 11:20 AM

Drew.young1980

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Yea it is a squeal that gets louder when the RPM's go up. Would cooling fans or tensioners do that?

Nov 14, 2014 | 02:07 PM

ppgoal

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Joined: Sep 2006

Posts: 2,738

From: Holland MI

I think cooling fans have a set speed. Sounds that increase with engine revs are moving parts connected to the engine. Think serpentine belt, P/S pump, A/C pump, or tensioners in the timing belt. I would have someone rev the engine slowly while you try and listen/pinpoint from the engine compartment. Keep car in park.

Does it happen only while the car is moving, or does it also happen when it is in park/neutral. That separates drive train noise from engine noise.