CRAPP!! weird vibration, PLEASE PLEASE Help!!!!!!

[lordofthewaters]

yes.. if you pull it off wrong or do some back yard style hammer removal then theres a nice chance that the pully is bent.. and outta ballance... so when the engine runs weather its idle or rev'd you would get a nasty vibration....

+1

I'm late to the party here, but this is the first thing that came to my mind when I opened this thread.

[Burning2nd]

In regards to the harmonic balancer... is that by any chance the crank pulley?

yes.. if you pull it off wrong or do some back yard style hammer removal then theres a nice chance that the pully is bent.. and outta ballance... so when the engine runs weather its idle or rev'd you would get a nasty vibration....

[silversleeper]

I will be doing ltw f/w and new clutch kit come spring. So hopefully that'll resolve my vibration issues.

In regards to the harmonic balancer... is that by any chance the crank pulley? Even if it is not, I wish someone sold a CNC machined underdrive pulley for our cars. All I've seen is an alternator pulley. I don't use the A/C so that could be dropped for weight savings, in addition to using a lighter weight material to make the pulley itself.

[Burning2nd]

flywheel,
or
drive pully

if it stops when you press the clutch in while at a stand still then its the clutch..

Im leaning to a bent drive pully...


wait i forgot i have to call things proper a "harmonic balancer'

[emi325i]

note on vibrations.. The single mass flywheel causes some subtle transmission noises that are normal.. this sounds like marbles in a can, it's not high or low pitch, just lot of tiny little vibrations transmitted from the crankshaft, through the f/w, pressure plate, clutch disk into the trans

Also, our transmissions make a subtle high-pitch noise when the synchros engage, especially when selecting second gear. I notice it all the time when I down-shift into 2nd, prior to a turn (for example). the high-pitch noise is the transmission input shaft speeding up... or is it the intermediate shaft? hm... I'm not sure.. anyway.. it's one of the transmission shafts speeding up.

However, clicking, clunking or grinding is not normal.

[blueapplesoda]

clicking = u joints?

[silversleeper]

what were the results of this condition after all the work done?

I recently noticed some minor vibrations which appeared to be coming from my drivetrain. I figured it was just from my worn front right tie rod. But a couple days ago, sitting in the parking lot waiting for my car to warm up, I revved the motor up to about 2k rpm. I felt that vibration.

The car was in neutral, clutch not pressed in, car at a standstill/parked. At about 2k rpm the vibration becomes noticeable. It continues, gradually getting more prominent until about 3.5-4k rpm. Then it just disappears. So from 2000-4000rpm, a vibration is noticeable.

In addition to that, when the car is in gear, and I am just moving at about 5-10mph, I can hear/feel a clicking sound coming from under the center console (where the driveshaft lies), but this is totally unrelated to the engine vibration.

Anyways, I'm just lookin for an update on this thread, or maybe new advice on my problem that I just stated above.

[porsche gt1]

Now,, after pulling back up, i listened carefully.. with the Clutch out, and contacting the pressureplate/ flywheel or whatever (note my not-knowingness) there was a "rubbing chatter" ,almost like a turning noise, with an occasional single chatter here and there..
putting the clutch in it goes away.. completely and no sounds from that area.

what could that be?

throw out bearing.

:drink:

[87-325ic]

i agree with dropping / inspecting the tranny but for me.. right now, that is not feasible..
Besides, ive never done it and wouldnt know what the hell i was looking at.


Update.

I swapped in some stock rubber Jello bushings, and the Vibe went away.for the most part..

i was able to get out and run it decently for the first time.. So, my problem is the Urethane tranny mounts are just too stiff for me right now. But, that doesnt solve it.. there is definately a pre-existing problem that the Stock rubbers were masking.

a few minutes after i was driving i noticed a vibration almost showing up again.. it was a very "high-pitched" (whereas before it was a low pitching thumping) vibration..
what seemed is that i Mostly noticed it while coming to a stop with the throttle closed.. (ie, anytime theres a vacuum on the engine, thus changing the exhaust...)
This question is : does the IE exhaust have a slight rasp/ vibration when first put on? that seemed as so..


Now,, after pulling back up, i listened carefully.. with the Clutch out, and contacting the pressureplate/ flywheel or whatever (note my not-knowingness) there was a "rubbing chatter" ,almost like a turning noise, with an occasional single chatter here and there..
putting the clutch in it goes away.. completely and no sounds from that area.

what could that be?

[DanielHStout]

2 TIMES ON THAT.

+3

[porsche gt1]

Drop the tranny and inspect!!!!

2 TIMES ON THAT.

[ecorrea21]

Drop the tranny and inspect!!!!

[87-325ic]

nope and nope,

its from within the engine for sure,

im 95% towards the flywheel.

[BUDNUNTA]

Front subframe bolts?

[fidelis83]

Maybe this is a stupid question but is there any way your firing order got mixed up?