Re: Do not turn the motor over...
The only way to tell for sure is to pull the head. A quick check would be to take the valve cover off and turn the motor by hand (big wrench on the crank nut). Watch the valves actuate. Bent valves will stick in the valve guides.
OrcBMW CCA 356800
1989 330is (S50B30 Orca) (In Memoriam)
1988 325is (Grey Ghost)
1989 330i (Cabrio/Orca)
1988 ///3 (dismantled for the suspension)