i have a balanced rotating assembly that i removed from one engine into one of my cars. i changed nothing aside from the flywheel and dampner. its a nuetrally balanced setup and the flywheel and dampner have no weights. there is no vibrations that i can feel at any rpm but my balancer bolt keeps backing out? wtf. i dont get to drive the car because its not on the road but i have a long driveway and go up and down it here and there to keep in a running state. i found the balancer bolt laying on the ground when walking to get the mail. i put a different bolt in the car drove it some more and it loosened up again.. i really want to get this thing back on the road when i get some extra cash but what could be causing this? i sunk alot of money into this car and would love to get a chance to enjoy the load of ****.

 

mine backed out once, i actually heard the cam sprocket banging around because it was loose and that is how i got it before i lost my bolt, i just put some red locktite on it and never had a problem again, you can hear it in this video

http://goo.gl/aAz9

 

Are you using a stock hub?
Are you using a stock bolt?

 

Some red locktite and rattle it on with an impact gun.

 

its got a jegs keyed hub and i had a stock bolt in it .. i think i got a mr gasket one from autozone to put in there for now. i am ordering a new arp bolt for it just for spite.

 

Do you have the stock washer under the stock bolt?

 

Yeah

 

you definately need red locktite and to torque it down to specs

 

its been torqued to the proper spec.. just minus the loctite.