Awful Noise...Bad Clutch or Flyweel?

[imported_sarmo]

OK. first off we're talkin about a 2000 civic si. Just in the last few days I noticed when I get up to around 7500 rpms until I shift at redline (around 8000) I can hear a grinding noise like if I were to miss a gear but the car is actually still in gear.
Does that mean bad clutch, flywheel or tranny...or is it something else???

[imported_Lacuna]

Sounds like you need to stop redlining.

[simplegreen]

Originally posted by Lacuna@Nov 6 2003, 02:23 PM
Sounds like you need to stop redlining.

useful advice only please or dont post


do you feel any vibration or jaring? do you notice an flux of rpm? what sort of modifications have you done that could cause this? as far as turbo nitro major stuff

[imported_sarmo]

I just put a Zex 55 shot of nitrous on there. I've only run it about 10 times since I got it a month ago. I haven't ran it in the last 2 weeks and the sound didn't start until yesterday.

[Smooth_Imports]

so you have ran 10 shots on 55 jets in two weeks. This could be the start of your problem. If you don't have any internal work done to your car you shouldn't be juicing it everyday. When you hear this grinding noise is it in every gear. Does it do it if you are in netral and rev up that high or do you have to be engaged in a gear?

[simplegreen]

it's really hard to dianose sounds and things of that nature w/o beign there man you might wanna check with a local shop or a friend who has expereice in the field but a 55 shot that much on a stock clutch i mean usually it will hold but that can't be good for her..

[imported_sarmo]

Things I forgot:
I have a stage 2 clutch.
That 10 shots was actually in a span of about 3 or 4 weeks...(I guess I have had the nitrous on longer than I thought.)
The noise happens in the top of 1, 2, and 3 (maybe the others but I havent had it up that high lately)
I can kind of feel the stick shifter in my hand vibrate like when you grind the gears but other than that there is no vibration or jarring to the car as a whole.
Their is no fluctuation in the rpms...I just hear that nasty sound

does that help a little?

[imported_Lacuna]

Did you replace the throw out bearing when you replaced the clutch?

Thanks mdlax I might just take that advice.

[dubcac]

If it happens in all those gears, and there's no fluctuation in RPM, I'm thinking something tranny related...main shaft maybe?

[imported_team_adrenaline]

Have you noticed the same noise but quieter when first taking off or in neutral with the foot off the clutch? This will be quieter then the one you describe but should be roughly the same noise if it is a bearing in the tranny. I had the input bearing go bad on my tranny and it made an awful noise at high rpm's and also in neutral. Just an idea to check.