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Whirring Noise

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jackdanielz Collaborator

jackdanielz

Posted
Posted

have u just had any of ur belts replaced?

cause i had the same problems when i have my timing belt replaced, its making noise if i had her on idle or at low rpm, like parking...

so i brought it back and have it retensioned and it is smooth as ever since

my 2c

bly

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Birds Grand Master

Birds

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Posted

Matt, when you say throw the clutch are you referring to pressing the clutch pedal in? If so then I would say it is a bearing rollover noise in neutral. Will need these bearings replaced to get rid of the sound. The unfortunate thing about this noise is, depending how loud it is, you can never *guarantee* getting rid of it...sometimes reconditioning the gearbox will only silence the noise or quieten it down a bit. This applies particularly to the older Nissan boxes such as R31 and R32 (also diesel GQ Patrol gearboxes for the people who give a shit). Given you have an R33 box it may benefit you to recondition the thing but you need to determine whether it's a sound you have to listen for to hear / turn down your stereo to hear, or if it's loud enough to be instantly recognisable by someone from outside of the car.

If the problem goes away when you release the clutch pedal then it is almost certainly thrust bearing related.

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Wacky Dee Veteran

Wacky Dee

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Posted
If the problem goes away when you release the clutch pedal then it is almost certainly thrust bearing related.

You mean if the noise goes away when you press the clutch pedal IN, right ?? Because that's when mine goes away..With clutch released and in neutral is when it IS making noise.

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Birds Grand Master

Birds

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Nope, I meant what I said. It makes sense if you relate it to the original poster's context. If you take your foot off the clutch pedal in neutral and it starts making the noise, it is very unlikely your thrust bearing. People often confuse these symptoms, but the thrust bearing only starts spinning when it acts on the pressure plate as per you pushing the clutch pedal in - all other times it usually remains idle sitting on the input shaft sleeve, therefore will not make a noise.

It is however a good idea to replace this bearing (and your clutch) at the same time as fixing your gearbox, just to save you possible future troubles from it, but I'm 95% sure the TB is not your problem Wacky Dee. You too have a gearbox rollover noise in neutral.

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**RB2530** Proficient

**RB2530**

Posted
Posted

Another cause can be your exhaust...It may be too quiet!! Larger systems fix a whole range of annoying and groans and rattles...

but seriously +1 for the gearset / bearing rolling noise...At idle, even in neutral, with clutch engaged (pedal up) input shaft, most bearings, gears /synchros still spin. Only thing not spinning is the output shaft. Put foot on clutch and everything in g/box stops (as long as car is stationary) except for throwout bearing which then has fair load on it.

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