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Name that engine whistle!

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Old 11-30-2009, 02:32 PM
  #16  
chago996
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Mine did the same noise 2x in the last couple of weeks. 103K on original clutch. Its very sporadic, but I did have the tranny/diff oil changed at its last service 8 months ago at 95k. Yet, the noise started about 2 weeks ago. I was thinking more towards alternator starting to go, or perhaps water pump, but I'm no mechanic.
Old 11-30-2009, 06:28 PM
  #17  
Eharrison
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Originally Posted by Mother
Tuff call but changing the tranny oil change could not hurt. The throw out bearing is not spinning when in neutral so should be out of the picture.

Is the throw out bearing really not spinning? I would figure it would.


Originally Posted by ivangene
Does it ever stop, after some time, or is it always making the noise?
Yes when it gets warm but it can still show up while the cars warm. It'll end up having short irregular whistles

Originally Posted by rb101
Take off the belt and see if the sound goes away. I think it's a idler pulley or alternator bearing going bad.

Rick
99 996C4
87 944S
Done that and the noise was still there.

Originally Posted by chago996
Mine did the same noise 2x in the last couple of weeks. 103K on original clutch. Its very sporadic, but I did have the tranny/diff oil changed at its last service 8 months ago at 95k. Yet, the noise started about 2 weeks ago. I was thinking more towards alternator starting to go, or perhaps water pump, but I'm no mechanic.
I first thought it was something in the back but after chasing it a little more I realized it was coming from the point where the tranny and engine meet.
Old 11-30-2009, 06:53 PM
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chago996
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I would post the video also on renntech.org. The moderator is pretty good on diagnosing.
Old 11-30-2009, 08:34 PM
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C4CRNA
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I think water pump.
Old 12-01-2009, 07:43 AM
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rb101
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Originally Posted by C4CRNA
I think water pump.
But the noise would go away if the belt is removed. I tried one of the idler pulleys earlier and got shot down.

Rick
99 996C4
87 944S
Old 12-01-2009, 10:46 AM
  #21  
Eharrison
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Originally Posted by rb101
But the noise wouldn't go away if the belt is removed. I tried one of the idler pulleys earlier and got shot down.

Rick
99 996C4
87 944S
Changed it.

I didn't shoot you down....I wrote that I removed the belt in the first post!
The only way help on here works is to keep posting possible symptoms. If I shot you down, I apologize. I appreciate your input.

Last edited by Eharrison; 12-01-2009 at 11:14 AM.
Old 12-15-2009, 06:26 PM
  #22  
chago996
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Did you ever figure out the source of the noise?
Old 12-15-2009, 06:50 PM
  #23  
Eharrison
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No,(as I type this at the airport bar waiting for my flight!) I've been travelling and haven't taken the car out, except once where I went to get my no front plate violation corrected at the CHP. I'll probably change the tranny fluid out over Christmas. I'll keep you posted. I'm still researching types of oil, Swepco or Mobil?????.

My hearing for the speeding ticket is today too, fingers crossed! I hope it's going to be good news.
Old 12-15-2009, 06:52 PM
  #24  
Erik@GBox
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Well obviously it could be several things here, but one other consideration, and one which you probably do not want to hear about is, it could be the pinion bearing starting to give up.

This is pretty common as these are sealed units and do tend to go bad. They unfortunately require a complete teardown of the gearbox to replace this bearing, I would replace the other sealed unit on the main at the same time.

If it does seem like this might be the issue and you would like some help with this, please do not hesitate to contact me. These are pretty tricky gearboxes as the gears are pressed on with a 40 ton press. I hope that this is not it, but I thought I would share this possibility just the same.

Erik Johnson
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(303) 895-4828 cell
Old 12-15-2009, 07:26 PM
  #25  
Eharrison
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Originally Posted by Erik@GBox
Well obviously it could be several things here, but one other consideration, and one which you probably do not want to hear about is, it could be the pinion bearing starting to give up.
Great well it will give me something not to look forward too if it is. We'll know at spme point. If it fails will it become something that will grenade the tranny? Any way of checking if its that?
Old 12-16-2009, 09:41 AM
  #26  
Dave!
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Don't worry, if you can hear the sound at idle it's not the pinion shaft bearing--the pinion (output) shaft only rotates when the car is in motion.

I'd still say your most likely culprit is the throw-out bearing. Can't really tell from the video but a throw-out bearing has that similar sort of noise, and goes away after a bit of driving. The part is $80 but would have similar labor times to replacing the clutch, if you take it to a shop may as well do the whole deal.
Old 01-08-2010, 10:32 AM
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ivangene
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Any further on this one...

as a side note, mine took a year off...... and is back

couple days this week it was back, then gone again - mine is (IMO) exactly the same thing you have from the vid clip

Ed
Old 01-08-2010, 10:52 AM
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Eharrison
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I'm going to pull that tranny but I might wait since there's another car run in Feb that I want to go on and after some time the whistle disappears, so I'm betting that it'll take another 100 miles of abuse. OORRRRR I pull it this week end and see what's going on. I'm not a good planner when it comes to these things.
Old 01-08-2010, 10:59 AM
  #29  
ivangene
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yea, I understand.... its easier to talk about than do....

then once done, you do get that satisfied feeling
FWIW - my has gone more than 100 miles
Old 01-08-2010, 12:37 PM
  #30  
Dave!
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As the release bearing gets worse the clutch action will feel weird and it wears the bearing guide so you'll want a new one of those when you replace the bearing.

I can't say for sure but I don't think it will cause any serious failures if you ignore it for a while. I've heard of people driving around for a couple of years with constantly noisy release bearings, but an old Toyota is not a Porsche so take that with a grain of salt.


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