Hey, so I just got a 350z a couple months ago
I replaced the original clutch and flywheel (dual mass or something i think right?), with aftermarket ones. Put in an exedy clutch kit and an act prolite flywheel.

Now I noticed when idle (clutch pedal not pushed in, in neutral) there is this rattling/clicking/grinding sound thing coming from the engine. I assume this is normal because its not a dual mass?

Also, it sounds like a truck accelerating :/
but other than the sounds its works fine.

Do you know what could be causing the rattling? My friend thinks a lose throw-out bearing but I'm not sure. My mechanic says the sounds is normal/fine since I went with aftermarket parts...

 

The rattling and grinding sound would be flywheel chatter from the lighter flywheel. Lighter flywheel = more chatter

 

The question is asked often and the answer is always the same. Aftermartket flywheel-clutch is not made for for the average driver. It makes all sorts of strange noises.

 

Mine does the same thing. Learn to love it

 

very interesting info..i am in the market for a new flywheel / clutch...how loud is this chattering? is it so loud and annoying the girl in the other car cant hear a single word im saying?

 

Ah I see!

Haha I guess I will!


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Well thanks for the info guys.

david79 - It's not that loud, I'd say perhaps up to par with the engine idle, although a little louder. I'll see if I can record the sound on my phone for you if you'd like :/ But I will say I do like the feel of the aftermarket parts I put in over the stock, not as stiff Sound is just annoying but eh, my girl can't hear it inside the car so oh well!

 

Light weight flywheels have been doing this for the past 6 years now, there is even 6 years of people complaining about it on here too.

 

My JWT is in the mail kinda wanna find out what its gonna sound like now.

 

my friend has a jwt lightweight in his 06. makes a similar sound like mine. :/ we've just learned to deal with it. i still like the feel over stock

 

get used to it dude...i got the ACT package and it does chatter but not as much as JWT does...my buddies ride sounds like a straight up truck...

 

what act package did you get? i got the act xact prolite flywheel, if i remember correctly. mine sounds like a truck! haha. i just turn up the sound and don't notice anymore lol.

 

street lite flywheel and heavy duty pressure plate with street disc..mine dont sound as bad as others...dont really notice it that much..make sure you install everything back the way it was...especially where you shifter is....

 

the prolite is 9 lbs if i remember right..mine is 12 unlike yours...i guess the lighter it is the louder it is..lol.but hey throttle responds so much better...

 

does anyone know, when changing the clutch do you have to drain & refill the tranny / diff fluid?