New Clutch = Wow

[Sydneykid]

Gary, I call it a rattle but it is also referred to as chatter. Should I still be concerned?

Nearly everyone, every post i have read re lightened flywheel, always has an element of "chatter/rattle". It's even there on the stock clutch to some degree.

Every one of my cars (trust me, that's a lot of cars) has had a lightened flywheel at some time in its life. None of them, not a single one, has had any chatter or rattle, except the damn multiplates and that's normal. When the R32/33/34's get old, the gears in the box rattle a little at idle, but again that's normal for that size of box. The clutch fork sometimes rattles, but that usually a sign of a worn slave cylinder not holding pressure on the thrust bearing. I doubt the V35 would be doing any of that.

So I am left with my original thought, something isn't spot on.

Cheers

Gary

[NISMO]

Every one of my cars (trust me, that's a lot of cars) has had a lightened flywheel at some time in its life. None of them, not a single one, has had any chatter or rattle, except the damn multiplates and that's normal. When the R32/33/34's get old, the gears in the box rattle a little at idle, but again that's normal for that size of box. The clutch fork sometimes rattles, but that usually a sign of a worn slave cylinder not holding pressure on the thrust bearing. I doubt the V35 would be doing any of that.

So I am left with my original thought, something isn't spot on.

Cheers

Gary

Here's a description I've found

where the pulses of the ignition cycle are no longer absorbed by a heavy flywheel and can be heard in the transmission at idle

And another from a G35 website

It's normal for cars such as ours that have a stock dual mass flywheel that is replaced with a light weight single mass flywheel. The dual mass flywheel has noise dampening properties by its design.

To be honest your probably the first person who has straight out said that there must be something wrong if you hear flywheel chatter. That doesn't mean I'm doubting you, but you've got me concerned, and it's hard to ignore thousands and pay for the box to be ripped out and all checked. The gearbox place is adamant it's normal, so any checking would be at my expense.

If you know someone who is willing to pull it out and take a look for free, let me know, I have no issue with it being checked.

[scathing]

My understanding is that every non-dual-mass flywheel "chatters" to a certain extent.

My JUN one chatters, especially after I've given the car a thrash and it gets hot.

I got it slightly used (under 10,000km) and the previous owner said it chattered too. As Bobby has said, everyone says these single mass lightweight items tend to make that noise.

[NISMO]

My understanding is that every non-dual-mass flywheel "chatters" to a certain extent.

My JUN one chatters, especially after I've given the car a thrash and it gets hot.

I got it slightly used (under 10,000km) and the previous owner said it chattered too. As Bobby has said, everyone says these single mass lightweight items tend to make that noise.

Thanks Alan,

Another vote for chatter is putting my mind at ease :-)

Mine is pretty much the same as you've described. When it heats up it get's a little noiser. Still definately not unbearable and definately worth the better feel the car has

[shonen]

Inner city these days.

The car's going to Pro Concept tomorrow so they can drain the gearbox fluid and see what lumpy bits fall out. I'll need to have ordered a clutch within a day or two of that, once I work out what I'm doing.

My head says "Nismo twin plate Coppermix", my heart says "ATS twin plate carbon", but my wallet says "JWT single plate".

Alan.....use your head !!!

Not trying to hijack the thread, but while we are on the topic of the transmission side of things, anyone know if the Cs Z33 short shifter will fit the V35 ?

[rb26stagea]

Alan.....use your head !!!

Not trying to hijack the thread, but while we are on the topic of the transmission side of things, anyone know if the Cs Z33 short shifter will fit the V35 ?

I just bought a generic short shifter, and they swore blind that it fits Z33 and V35: same part number... That said, without my car here yet, I have only the supplier's word for it...

[scathing]

Another vote for chatter is putting my mind at ease :-)

Its quite funny.

I've also got a B&M short shifter, which is absolute rubbish because it rattles like a bitch past around 3000RPM. When people get in my car and ask what that rattling is, I have to ask "which one? The low RPM one or the high RPM one?"

All the stuff I've seen for the short shifters have the same part for the Z33 and V35.

[scathing]

anyone know if the Cs Z33 short shifter will fit the V35 ?

Thomas, are you getting a really good price on it?

If not, I'd probably get the Nismo adjustable short shifter. If you're just pootling around town you can leave it at the factory length (or extend it if you have an aftermarket knob like mine, which lowers the overall height) so the leverage makes it easier to shift, but then you can drop it down when you want to go for a thrash.

[Sydneykid]

A dual mass flywheel is like a harmonic balancer, it dampens the inherent V6 vibrations caused by the firing order and the shared big end journals. Plus it absorbs some of the inertia impact when the clutch is engaged swiftly. What the posters are saying is that the gearbox input shaft rattles at idle due to the engine pulsations. This is easy to check, stick the car on the hoist, let it idle and raise the hoist, grab a mechanics stethoscope and listen to the gearbox around the input shaft bearing location. Take about 20 seconds to confirm if that is in fact the source of the rattle. Total cost $not very much.

Cheers

Gary