The Stovebolt Site Forums The Shop Area Engine Shop Clutch rattling noise upon disengagement.

Wondered why noise occurred. Turns out upon disassembly the coil springs in the clutch disc were rubbing the heads of the flywheel attach bolts slightly. Flywheel was made too thin by turning or wrong clutch disc was installed. Hard to determine, everything had just been replaced , probably because being used as mouse hotel. Perhaps only. .030” or so of interference.

Hard to determine without complete disassembly.

Should be able to remove problem by grinding bolts slightly to area of full thickness, removing locking tabs, using lock title. still a pain.

I wonder what the mechanic told the owner when that noise appeared, perhaps the same person?

Ed

Is the clutch disc facing the right way? I always have to stop and think about this, but shouldn't the side we're looking at be facing the transmission?

Jon,

That was what I thought at first, but the other side sticks out even farther.

Ed

Hmm, well I've seen probably 30 or more flywheels resurfaced and have never seen one overcut so much this happened. However if the disc is installed correctly, then I can only see too much cut off the surface of the flywheel, the wrong disc installed or the wrong bolts used as the problem. Maybe a thin washer as a spacer between the hub and the flywheel would be easier? Good luck.

EdPruss fly wheel side.

Those bolt heads don't look right to me.

That wouldn't affect how high the bolt heads stick above the flywheel surface.

Maybe taking a few thousandths off the mounting surface of the flywheel would work, but it would be easier to shave the bolt heads down a bit.

What's wrong with them?

Is there a minimum thickness specification that a flywheel can be cut?

I agree with Kevin. The flywheel is recessed where those springs ride so more clearance is needed. You could cut that recess deeper, but taking some off the bolt head seems to be much easier option.

You have the wrong flywheel bolts !

Could be, who knows where they came from. Obviously, if these are wrong, correct ones must have thinner heads. These may be from modern GM.

Ed

Hi Ed ........

So, did you get that "clutch noise" . . . . figured out . . . . . ?


The reason I'm asking - - - is that I now am using a B-W T 5 ('93 S-15 GMC , W/C ) in my car behind my 250 L-6 motor .
I have changed over from a power glide to the T 5 .................. and at times my stock ( 10.5" clutch disc ) does make a noise . I've been running this "set - up"
since March 2018 ................ and the noise drives me 'crazy' ................ but only happens part time . I used all new parts when doing this install : with the stock
Z- bar linkage , and stock ' rebuilt T 5 tranny .
Thanks for any info you may have ............

jim

I never did figure it all out, putting automatic on it. Best guess is wrong clutch disc, I don’t have another one laying around to inspect.

Be best to pull it apart to fix problem rather than risk problem later on.

Ed

Thanks - Ed , for your answer ..................... I was thinking - maybe the wrong "throw-out-bearing" .

but , then saw your 'flywheel bolts & clutch springs' ...........

later , jim