I just replaced the engine and transmission mounts on my 2000 Pontiac SE 3.1L. In order to get the top 2 nuts off the motor mount, I had to take the 3 bolts off the engine bracket. Then, by jacking up the engine, I was able to move the mount /bracket enough to be able to remove the top nuts,slide out the bracket,then the engine mount was easy to remove.
To replace, I put the new mount in place, attached the engine bracket with the 2 end bolts(loosely),leaving the front bolt off until later.
I then lowered the engine/bracket on to the mount enough to get the nuts on. Put the bottom nuts on as well. Now you can tighten up the top 2 nuts on the mount,put in the 3rd front bolt on the bracket,and tighten all 3 bolts. Lower the engine, and tighten up the 2 lower mount nuts . This was the only way I could get the top nuts off. Hope this helps as I was helped by reading other info. Posted.
