We had issues with this motor and mounting a few years back. If memory serves me correctly (sometimes it does and other times it don't) I think it had to be brought forward; closer to the door to prevent too much stress on the design. Newmar should be able to help you with this in part and in a better installation than was originally done. GOod luck and keep us informed.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7