82 and center 38 c of stud bolt 38 are offset by distance l 2 this allows engine mount bracket 70 to be positioned accurately without the use of separate parts while only requiring a simple and inexpensive structure in engine mount bracket 70 alignment is performed with end section 38 a of stud bolt 38 thus separate parts such as knock pins are not required reducing the number of parts moreover there is no need to form an opening on cylinder block 4 thus further reducing costs since alignment extension 80 of engine mount bracket 70 is positioned at end section 38 a of stud bolt 38 nut 42 cannot come off even if it becomes loose this prevents nut 42 from damaging other parts since engine mount bracket 70 is not fixed to separate elements such as water pump 32 the vibrations from the engine mount attached to mount attachment boss 74 does not affect the other elements such as a water pump gasket not shown in the figures thus leakage and the like are prevented referring to fig1 through 15 a second embodiment of the present invention is described elements that serve the same function as the embodiment described above are assigned the same numerals the characteristics of the second embodiment.