I think my problem was i did them up when the engine wasnt in its natural posistion i.e the crane still had a little of the weight if i remember correctly.
I could be wrong as my memorys like a siv, but yes there going to shear if there not tight to the block as where the bolts pass through the holes in the mount they do have some play therefore if they aint tight, the mount holes will act like a madly vibrating cutter
