pulley coming loose

I have a 95 honda civic and the pulley that drives the alt,power steering
and A/C keeps loosening up.The bolt backs out I tighten it up and it is OK
for a few days then it loosens up again.usuallythis bolt is so tight it is
hard to get loose when replacing the timing belt.Has anyone seen or heard of
this before?

 

It sounds like you're referring to the front crank pulley bolt, correct?
This bolt should be torqued to 137 ft. lbs. If you're not tightening it to
this specification, then it could explain why it keeps coming loose. You
could get it tightened at a shop or you could do it yourself. If you choose
the latter, then you'll need the special crank pulley holding tool which is
made by SP Tools part #60100. You can get this at Tool Town for about $50
if you have one nearby, or they can be purchased off the net for a little
less. You'll have to search through this group via Google to get the URL.

Eric

 

Hmmmmm.....done LOTS of these over the years and never had one loosen
up (usually use an impact gun to put 'em on). One thought: if the
key has been lost or sheared, then the pulley could turn in relation
to the crank and gradually loosen the bolt. I would check out that
possibility. If that's not the issue, you might use a little
"Loc-Tite" on the threads....be sure to use the formulation that
permits disassembly. Don't know the torque specs for that...I would
guess 60-80 ft-lbs.

 

Never had a problem with them coming off, I usually use a torque wrench to
get it back to 137 lb-ft. As mentioned above, I would look to see if the
key was missing. As long as it's torqued properly and the key is still
there, it really shouldn't be loosening up at all.