Recently my d15 has been making a weird vibration sound coming from the timing belt area, i believe its the key way connecting the flywheel to the crankshaft pulley came loose and came off which leaving all of my drive belts stationary when running. when running it only stays on for less than a minute then shuts down because its getting no power from the alternator. Theres also no burning smell from the belts and my tensioner is fine as well. check this vid out.... http://www.youtube.com/watch?v=rfrIWADgAGk

 

your key way is gone, take your crank pulley off and make sure you didnt strip anything where the key way is suppose to be

 

Woodruff key is probably smoked, belts are most likely keeping the pulley in place as
the crankshaft spins.
I hate to say it but the crank might be smoked too.

OR the Woodruff key wasn't there to begin with?

EDIT: BTW the Woodruff key fits into the keyway

 

I just pulled the crank pulled off the Z6 out of my Si a few hours ago, key was missing. How odd.

Btw. wooddruff keys are shaped like a half moon. These are just a plain old key, or square key.

 

ok, thats what i thought.. you think its worth fixing? or should i look for another dseries?

 

yea this is an odd problem. thanks too ill be takin alook when this snow disapears