SicksSpeed

Got a new performance clutch put in. Now it seems that when I take my foot off the clutch I hear a little of it rattling with the engine. When I push the clutch in it goes away. This is in neutral with the car just idling. Should that be normal?

segagen

What type of clutch did you get? I'm guessing it came with a flywheel as well?



Sounds like flywheel chatter to me, perfectly normal for aftermarket single mass flywheels to chatter at idle/low engine speeds.

Stocker

Rattling when you drive away from a stop = possibly normal clutch chatter. Rattling just sitting there = something loose, go back and complain gently-but-firmly to the shop that installed the clutch.

Richardb1285

If the car is just idling and you hear the rattle it is just flywheel chatter. these cars do it all the time since you're converting from a dual mass to single mass flywheel. Don't worry about it it isn't a big deal, just kind of annoying.

Stocker

OK then I need education: WTF makes a clutch clamped in between the flywheel/pressure plate chatter when it's spinning in Neutral, idling along at engine speed? Seems like that should be dead silent time for a clutch.

Richardb1285

dual mass clutches are silent, and that is why most manufacturers will go with them, but a single mass flywheel holds tq better and doesn't slip as much. The downside being they chatter. The rattle you hear is from the gearbox and is normal with a single mass flywheel. At idle the individual cylinder-fire pulses are passed through the flywheel to the gearbox (with the clutch engaged) and those pulses rattle the gear lash/play in the gear train. A dual mass flywheel effectively has a rubber(or otherwise) damper in it which smooths out the pulses and reduces the gear lash rattle.

Stocker

This would be a very quiet noise then, yes? Like you wouldn't notice sitting in traffic next to a truck, but at home in the driveway you might be like "WTF is that?"

segagen

Mine depends on the temperature and idle load. Sometimes it sounds like your shaking a bucket of rocks, other times you don't hear it at all. In most cases I get stares from people on the sidewalk.



Wish I had my coupe, I would take a video to help the OP confirm the noise.

Richardb1285

exactly, a lot of it depends on the degree of the clutch you are running, also if the ac is on it makes it exponentially worse, since the motor is under load at idle. Its something you learn to deal with, i just turn up the radio.

SomeGuyDave

That's gear lash noise and 100% normal with a single mass flywheel. Its also what people commonly refer to as clutch chatter (I used to think the same thing), but clutch chatter is more of a stutter(shake), or chatter, when you first take off.



Real Clutch Chatter

http://www.youtube.com/watch?v=5aQluNgMwBc



Gear Lash Noise from SMF (but described as flywheel chatter)

http://www.youtube.com/watch?v=YyFgT...eature=related



This is a good read http://www.uucmotorwerks.com/flywheel/gear_rattle.htm





Segagen, I think on gencoupe you mentioned you were running Redline Shockproof? What grade? Did it help at all with the noise?