The most common mount that breaks on the 1995 Cadillac Sedan DeVille is the front lower mount--this is the torque side of the engine when in drive. It is a liquid-filled shock that tends to leak. It is in a difficult location to access, so the engine needs to be lifted a few inches and the engine cradle lowered an equal amount. This provides the necessary clearance for the mount to be removed.
Jack the front of the car up and support on jack stands under the frame. Remove the splash pan under the radiator. The splash pan may be held on with small bolts or plastic plugs.
Remove the 15 mm nut on the top of the mount using the short 15 mm wrench. There is very limited room to get a tool on this nut, so if it is hard to break loose, use another wrench on top of the short one to gain more torque. You can also use a large screwdriver to gain leverage.
Remove the two bottom nuts on the motor mount where they go through the frame. Place the floor jack in the center of the rear of the engine cradle. The engine cradle has to be lowered in the front and back. Remove the bolts in the rear of the engine cradle one at a time, and then reinstall them by hand with seven or eight threads. Lower the jack and move it to the front, allowing the frame to hang on the loosened rear bolts. Remove and install the front engine cradle bolts in the same manner.
Move the floor jack to the forward side of the oil pan, put a 2 by 4 on the jack and raise it to the point where it is just touching the oil pan. Remove the nuts from the remaining motor mount and the transmission mount.
Raise the jack and lift the engine slowly up until there is enough access to remove the front mount.
Install the new motor mount and make sure it is turned in the right position so that the upper stud will go through the engine mounting plate. Put the lower nuts on the motor mount and tighten them.
Lower the jack while aligning the top bolt of the motor mount to go through the engine mounting plate. Tighten the loose engine cradle bolts. Put the top nut on the motor mount and tighten securely. Reinstall the lower splash shield.
