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Old 03-12-2012, 01:10 AM   #1
LeadFoot81
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Default AU2 XR8 - Is it a Noisy Pulley?

Hey all,

I've been chasing up squeaks from under the bonnet (or rather my mechanic has) and after replacing three pulleys and a squeaky alternator I thought it was all sorted. However there is a new squeak, and I discovered today that it stops when I put even the slightest amount of pressure on the clutch pedal. Any ideas what it could be??

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Old 03-12-2012, 01:19 AM   #2
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Default Re: AU2 XR8 - Is it a Noisy Pulley?

Thrust bearing maybe. Ive had a couple with a squeeky cam angle sensor,that sounds like a squeeky pulley.
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Old 03-12-2012, 09:07 AM   #3
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Default Re: AU2 XR8 - Is it a Noisy Pulley?

sounds like the thrust bearing to me
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Old 03-12-2012, 03:10 PM   #4
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Default Re: AU2 XR8 - Is it a Noisy Pulley?

Ok thanks guys. I'll see what my mechanic says.
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Old 03-12-2012, 04:29 PM   #5
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Default Re: AU2 XR8 - Is it a Noisy Pulley?

Yeah, thrust bearing. Mine does that too, minimal weight on pedal and it goes away. i wouldn't call it a squeak though, more of a high pitched cricket noise.
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Old 06-12-2012, 11:14 PM   #6
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Default Re: AU2 XR8 - Is it a Noisy Pulley?

Cam synchroniser...
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Old 06-12-2012, 11:24 PM   #7
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Default Re: AU2 XR8 - Is it a Noisy Pulley?

I'm glad that you are synchronised, but what's that got to do with anything?
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Old 07-12-2012, 09:35 PM   #8
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Default Re: AU2 XR8 - Is it a Noisy Pulley?

I replaced all the pulley's and found out it was the cam synchroniser, the bearing at the top goe's dry, i replaced it & no more noise
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Old 07-12-2012, 11:04 PM   #9
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Default Re: AU2 XR8 - Is it a Noisy Pulley?

I forgot to mention that the clutch was replaced just over a year ago, so it's strange that the thrust bearing would be noisy. The question is would applying pressure to the clutch pedal stop the cam synchroniser squeaking??
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Old 07-12-2012, 11:18 PM   #10
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Default Re: AU2 XR8 - Is it a Noisy Pulley?

No mate the clutch has got nothing to do with it, your cam sync is where the disy usually is on a carby windsor. Its under your coils
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Old 08-12-2012, 09:13 AM   #11
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Default Re: AU2 XR8 - Is it a Noisy Pulley?

Its definitely the thrust bearing then as applying the clutch stops the noise. Sucks as the clutch was done recently and this would mean the box has to come out again!!
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Old 12-12-2012, 11:40 PM   #12
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Considering the thrust bearing is at the rear of the engine bay and the cam synchroniser is at the front, perhaps see which end the noise is coming from first before diagnosing?

That's what I'd be doing.


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Old 13-12-2012, 09:40 AM   #13
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Default Re: AU2 XR8 - Is it a Noisy Pulley?

I've had a clutch related squeak for a long time (goes away with minimal clutch pressure) but it seems that a new occasional squeak has appeared from the engine. I'm guessing cam synchroniser for that too since the pulleys aren't that old. Just gone past 125k km.
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