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High Pitch whine at 3000 RPM
Posted: Mon Apr 07, 2014 7:27 am
by sbaxter
It started before I replaced my transmission (twice), and is still there today, so it's not my transmission.
It's actually present at all times, but you can only hear in the back seat. When I hit 3000 rpm the whine kicks into high gear and permeates the entire car, but again louder in the backseat.
Does not occur when in Neutral, haven't tried to hit 3000 rpm in reverse....
Re: High Pitch whine at 3000 RPM
Posted: Mon Apr 07, 2014 7:29 am
by triz
Check your idler or tensioner pulleys. OCV valve?
The fact the way it dissapears in neutral or reverse kind of boggles me though. I was thinking throwout bearing.
Re: High Pitch whine at 3000 RPM
Posted: Mon Apr 07, 2014 9:07 am
by sbaxter
Pulley assembly looks fairly straighforward, looks like my project for next weekend.
Re: High Pitch whine at 3000 RPM
Posted: Mon Apr 07, 2014 10:32 am
by sideshowalan
FWD or AWD?
If it's AWD you should check your rear transfer oil
Re: High Pitch whine at 3000 RPM
Posted: Tue Apr 08, 2014 7:55 am
by sbaxter
FWD Base model.
Re: High Pitch whine at 3000 RPM
Posted: Tue Apr 08, 2014 5:51 pm
by Chiadog
Broken motor mount?
Re: High Pitch whine at 3000 RPM
Posted: Thu Apr 10, 2014 9:18 am
by circuitsmith
If you rev in neutral does it whine?
Try (temporarily) taking off the serpentine belt.
It's safe to run the engine for 15 seconds or so without the belt.
If the noise goes away it's the idler pulley or a bearing on an accessory (alternator, p.s. pump, water pump or AC compressor).
Spin each one by hand and feel for smoothness.
Re: High Pitch whine at 3000 RPM
Posted: Thu Apr 10, 2014 10:04 am
by sbaxter
It does not whine when in neutral.
Re: High Pitch whine at 3000 RPM
Posted: Mon Apr 14, 2014 11:08 am
by jolt
When you said back seat of car is louder, I am thinking fuel pump in tank making noise but when not in gear - no noise. Is this coasting in neutral or stopped? It could be the belt, pulleys, alternator bearings, water pump bearings, etc. on the motor but that noise should come from the front. You need to provide more feed back and information, is the whine a steady pitch or does the pitch change as a): engine rpm changes, b): vehicle speed changes? Does the noise change if you are coasting or turning right or left?
It may be a shield on the exhaust or a loose shield under the car that is buzzing. A broken exhaust hanger that is letting the exhaust pipe hit a part of the under body.