[doster]

Recently I've started getting a vibration but it only happens when i let off the clutch from a start

then it goes away until 2200 rpm and then it goes away again. its the worst when i hold it right at 2200

or when i decelerate past that rpm.



I suspected the belts because it sounds like a plastic rattle but its bad enough that i feel it everywhere

petal,shifter etc.



checked the belts and all seems fine could this be the cluch? when i'm under the hood and pull

the throttle i can't hear or feel it but when i get into the seat i can. cant think of anything that

would rattle around a certain rpm and not all the time



HELP!

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[au968]

Could be a lot of things, but I'd suspect the clutch/flywheel assembly myself...



My car had a lightweight racing flywheel in it when I bought it, and it used to make a lot of noise around those rpm's. Too much clatter for a DD <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />



Does it make the same noise if the car is stationery and reving through 2200rpm? What about if it's stationery and you hold the clutch pedal in while revving it?



The other vibe that might fit is the driveshaft bearings in the tourque tube. How many miles on the car?



hth.

Michael

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[doster]

[quote name='au968' post='28723' date='Dec 4 2006, 08:28 PM']Could be a lot of things, but I'd suspect the clutch/flywheel assembly myself...



My car had a lightweight racing flywheel in it when I bought it, and it used to make a lot of noise around those rpm's. Too much clatter for a DD <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />



Does it make the same noise if the car is stationery and reving through 2200rpm? What about if it's stationery and you hold the clutch pedal in while revving it?



The other vibe that might fit is the driveshaft bearings in the tourque tube. How many miles on the car?



hth.

Michael[/quote]





The car has 95k and yes it does it when its stationary. pressing the cluch doesn't

seem to matter. although the pedal feels a bit notchy when running and smooth when

the engine's off.



It doesn't do it when its cold, but gets worse as it warms up.



Planning a clutch change anyway is this a good time to change the drive shaft bearing?



Thanks for the help.

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[flash]

drive shaft bearing will require dropping the transaxle, and likely a couple of days down time - it requires a long ram press to change it - most people i know send it to 928 international to be done - roughly 500 bucks for that job alone



i recommend nailing down the noise before diving headlong into this - go buy a stethoscope - very cheap at sears



being a unibody car, vibrations and rattles move around a lot - the torque tube doesn't help either - that direct link makes it tough to track down - it could be as simple as a heat sheild, or as bad as a fragged DMF



be patient - try as many combinations of conditions as possible to help find it

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[doster]

Thanks fo the advice <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" /> I think I may have narrowed it down, the timing belt was loose ,seems

like the tentioner may be bad



I was able to put a wrench on the pivot bolt and tighten it back up, do these go bad?



Just received my new pulleys and will change tonight along with checking out the tentioner.



lol. Hope this is it <img src="/forum/images/smilies/968/laugh.gif" class="smilie" alt="" />

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[flash]

cool - so it looks like the plastic sound may have indeed been from plastic contact



yes, those tensioners can and do go bad



double and triple check your pulley orientation to insure proper timing



good luck

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[doster]

lol. So i've learned my lesson again!!!!!! Allways check the obvious, crawled under the car

with a 10 and 13 and started checking everything, turns out that the upper rear alternater

bolt was almost about to fall out and the dust cover on the bell hausing was loose.



The vib/rattle is gone and it was a cheep fix. So if you get a chance!! crawl under your car and

check your nuts <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />



Thanks for the advice i've learned a few new things to check next time <img src="/forum/images/smilies/968/unsure.gif" class="smilie" alt="" />

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[flash]

ok - now that you've found those things, make sure you check the tension on those belts



this is a common problem on the alternator - it often leads to broken mounting ears though - people try adjusting the alternator and power steering belts and invariably do it somehow wrong



either they fail to loosen the mounting bolts first before adjusting, or they forget to tighten them back up again afterward



good on ya though

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[doster]

[quote name='flash' post='28808' date='Dec 6 2006, 06:22 PM']ok - now that you've found those things, make sure you check the tension on those belts



this is a common problem on the alternator - it often leads to broken mounting ears though - people try adjusting the alternator and power steering belts and invariably do it somehow wrong



either they fail to loosen the mounting bolts first before adjusting, or they forget to tighten them back up again afterward



good on ya though[/quote]



Ya That sounds like a likely scenario I've only owned the car for about 4 months and have no idea

at all what has been to it. Thaught i did a pretty therough job of looking it over but obviously

I haven't , I'm still learning my car <img src="/forum/images/smilies/968/tongue.gif" class="smilie" alt="" />



Ps Don't be afraid to take it apart and put it back together but I can't figure out why i allways

have bolts left over <img src="/forum/images/smilies/968/laugh.gif" class="smilie" alt="" />

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