By taking the old one out and installing a new one...
yes
carefully
I own a 1994 Bonneville and replacing the back spark plugs was not too bad, there is enough room and with a socket extension you will have no trouble.
If you are speaking of the front mount, it is a transmission mount, and you must lower the subframe to R&R.
See if theres a shop manual at the library for free. d
With out knowing what car and engine, There is no answer.
I had it done at the dealer, it was $260 for front mount on passenger side.
It is as simple as removong 2 bolts and replacing the mount. Goodluck, JOe
You can replace your 1995 Chevy Corsica motor mount by loosening the motor mount retaining bolt. Jack the engine up approximately 3 inches. Remove the motor mount retaining bolt and the motor mount bushing. Put the new motor mount bushing in and reverse the process.
Front of the engine, behind the motor mount.Front of the engine, behind the motor mount.
Simply raise the car and support the engine on a jack, then unbolt it.
Remove the old mount & replace with the new.