I just got my new Z. It runs great with 133k miles however when it gets cold (like under 40-50 degrees) I push in on the clutch and theres a nasty kind of metallic rubbing/grinding noise. I personally think that my clutch throwout bearing is going bad but I also know that these cars have been known to have transmission issues. Anybody experienced this? Ive been a mechanic for some time and I know its most likely the bearing but I wanted to make sure it wasnt a common problem.

 

Is it just when you press on the clutch? or when you also engage a gear? If its just when you press the clutch than you are correct sir on your throwout bearing, but if its grinding when you engage gears, its the synchros in your tranny

 

x2 on throwout

 

Its only when the clutch is pressed in. I figure its probably the bearing, like I said, just wanted to see if anyone else has shared the experience. It definitely doesnt feel like synchros, Ive had them go out in a couple hondas and thats not what it seems like

 

From my experience the sign of a t.o.b. going bad would be noise with the clutch engaged ( pedal out ) but i guess it could be different in some cases

 

Why?? When the clutch is engaged (pedal up, foot not resting on it), there should be no load on the TOB, and it might not even be turning at all.

 

Hi. The transmission problems people report with the Z are synchromesh failures; usually when shifting fast from 6th to 5th, and 4th to 3rd. Some owners also describe a “notchy” feel, making it difficult to shift.

As others mention here, you are probably experiencing a worn throw out bearing; the main evidence is the noise happens while the clutch pedal is depressed.

--Spike

 

You may have a little chirp/rattle when the clutch is out, but it won't be much noise. But a grinding sound would come from the bearing spinning on the fork.

 

The bearing can't spin on the fork because there's a sleeve with tabs that would keep that from happening.





If the bearing is seized up, it could spin on the sleeve or against the fingers on the pressure plate as you push the pedal down. That would make a grinding noise for sure, but the TOB shouldn't be touching the fingers when the pedal is up.

Regardless, the OP or his mechanic needs to get in there to determine what's wrong, and it's probably time to replace some stuff anyway with that much mileage.

 

I know all about how the throw out bearing works, thats why i know it is most likely that that is causing the noise, I was just checking. I'm planning on a clutch job in the near future anyways so its not a big deal.