I have heard that when you change out pulley's that you have to change out the harmonic balancer bolt. Does anyone know what the OEM part number is for the bolt? I have heard that some people reuse their old bolt, and it works fine, anyone done this?
Thanks,
Jason

 

I bought a new bolt the first time I made the swap but since then I have done it again and used the stock bolt with no problems

 

I wouldn't re-use the stock TTY (torque to yield) bolt over. They do however have an ARP brand re-usable bolt. I would just get a new factory bolt if I were you. They are very inexpensive (less than $5) and well worth the piece of mind. Here is a link to what "others" have said in the past.

https://ls1tech.com/forums/showthrea...ey+bolt+torque

 

yea it isn't that expensive to buy a new gm bolt. just extra insurance.

 

Thanks for the info guys, looks like I will just get a new bolt.

 

****, I've taken mine off at least 5 times, it will be fine. Although I did have to borrow goshhawk23's socket at Thunder last year to tighten mine back up LOL!!!! Not that the pulley moved or anything, just stuck my hand down ther since I had just swaped the cam a few days earlier to check it. If you don't use a new bolt, you may have that problem, but if you reuse the one you have, be sure to check it like I do.

 

I have done several pulley installs reusing the bolt. I have checked the torque after use and it has never changed.

 

just put a little blue loc-tite on the bolt and it won't losen up. i reused mine.