<VV> idle rattle in the 66' Corsa

[Mark Durham]

A bit more. What I found on removal was two of the six flywheel bolts were
next to each other and under torque, and the machined face that fits to the
crank flange had not been completely cleaned up. No damage to crank flange,
however. All i know is I felt the vibration driving it, and the noise, which
went away when I pressed on the clutch. I was very careful to install the
new Dale Mfg. flywheel with new bolts and that new closer tolerance ring
from Clarks with a rebuilt clutch plate and disc and it has worked correct.
I also had found the pressure plate had been shimmed with plain washers,
evidently to provide room for a thicker disc, something I did not have to do
when I installed known source components (I used a Fort Wayne Clutch kit).

If you do not know the source of the flywheel, anyone could have done the
bolting and not done it right. Clarks sells a bolt kit for earlies, and I
think that is what I found. Mark Durham

On Fri, Nov 20, 2009 at 8:02 AM, Mark Durham <62vair at gmail.com> wrote:

> Ray, I just replaced a bolted flywheel that had the same symptoms. It was
> installed prior to me getting the car so I so not know who bolted it, it
> sure wasn't a Dale, but I had the same noise issues, that didn't seem
> completely correct. However, a Dale fixed it.
> Mark Durham
>
>   On Fri, Nov 20, 2009 at 1:37 AM, Ray Rodriguez III <
> ravensong13 at verizon.net> wrote:
>
>> Everything I've read so far says my problem is the flywheel, but I wanted
>> to run some details by you guys before I start thinking about pulling this
>> apart again.
>>
>> I hesitate to think its the flywheel because I just had it out of the car
>> (brand new clutch too) and inspected it... didnt find anything wrong.  Its a
>> bolted flywheel and rang like a bell when I dropped it from an inch or so
>> off the floor.... that was the test suggested in HTKYCA.
>>
>> This noise started about 500 miles after I put the car back together. I
>> hear it only at idle.  From inside the car it sounds like its coming from
>> under the floor toward the front, from outside it is hard to track down but
>> I think its probably coming from the drivetrain area... this noise transfers
>> all over the place.  I dont really hear it outside the car unless I stick my
>> head underneath... and then its near impossible to tell where its coming
>> from.
>>
>> Depressing the clutch halfway or more silences it (flywheel symptom I
>> know), also.. here is what I thought was odd....   if I leave the clutch all
>> the way out, but apply pressure to the shifter as if to shift into gear (but
>> not enough to grind) the noise goes away.... stop putting pressure on the
>> shifter and it comes back....  does that fit with the flywheel theory?
>>
>> I thought maybe the clutch cable was rattling around, adjusted it to no
>> avail.
>>
>>
>>
>>
>> Whatta'ya think?  Any other possibilities besides the flywheel?  Any tests
>> I should do before I give in and pull the engine back out?
>>
>>
>> Ray Rodriguez III
>> CORSA member
>> 66' Corsa 140/4 hot rodded coupe
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