The bolt heads on the harmonic balancer for my e70 30i (n52) are super rusty. I’m afraid I’ll snap a bolt head off if I try and use one to instal the ac stretch belt. (It’s the 4 bolt pattern, not a single central bolt)

I have some large kobalt clamps and I may try and clamp one around the balancer for more leverage but otherwise I’m at a loss.

Any thoughts on how I can turn the crank by hand or install the stretch belt without turning the crank?