drobinson1692

Hey guys. Had the S2000 for about 5 months now, not putting tons of miles on it but just rolled 18,500. So still very low miles for 2007. Recently though i'm getting a weird vibration in my clutch pedal.
-It's right above the engagement point and can be felt when downshifting most noticeably.
-It's like an electric trimmer or razor, very high frequency.
-Just started noticing it on these colder days but ONLY after the engine/trans is warm. It can be felt if you're in gear and driving and lightly touch the pedal. It's literally the first second that pedal pressure is put on the master cylinder at the end of the free play.
-Progressively getting worse/more noticeable.

I have only done a few things to the car 1. trans fluid flushed 2. clutch fluid resovoir emptied and refiled 3.clutch pedal free play adjustment (i re-adjusted it back out to see if that changed anything.

I also noticed a drop on the bottom of my master cylinder in the footwell. I will replace that and I know that there could be air in the system. Could that cause it?

BEFORE SOME SAYS CRANK WALK, I did test to see if there was play in the crank by prying at it and pushing it back in until it 'clunked.' I didn't have the measurement tool but it literally is moving so little that I can't see the push. I'll work on measuring it but I don't think that's the problem.

Black S2K

first im hearing of this. gl man. its probably nothing though. did u make sure the peddle assembly is snug and theres no play anywhere?

drobinson1692

yea I'm asking around on some other forums. I also can note a scraping sound on deceleration if that means anything. i also have clutch buzz in my ap2....wonder if somethings wrong with my disc...

drobinson1692

Okay another theory - let me know if this is ridiculous. I'll get it on a lift soon to see if it's possible.
I had the free play at just about zero in the pedal/left the free play in the master cylinder. I didn't have pressure on the master cylinder, just very close. Is it possible that I had the release fork resting on the throw out bearing and the fork is now bent or loose? I know this would be easy to tell if i got it on a lift but does that sound reasonable? I'm trying to think what could have caused this

ZERO-FIGHTEREF9

I would check on the little nylon bushings under the dash. They were out over time and will cause some play, then leading to vibration.

But as for the the clutch cover or diaphragm, I doubt the fingers are bent or damaged, they are sprung steel after all.

drobinson1692

could you expand that? what little nylon bushings under the dash?