That exactly what happened. 3 of the pulley bolts completely sheared and 2 of them had back out.The sheared bolts we’re stuck good in the back of the harmonic balancer threads.The 27mm bolt was tight but in order to get the sheared bolts out and with the limited space the best way was to pull the harmonic balancer after marking them all. I plan to change the crank shaft seal while I’m at this point anyway. So far the end of crankshaft and everything looks good just still in search of the 2 metal dowel pins.