How do you replace the rear motor mount on a 91 Honda Accord LX?

don't know but the salvage yard has you to pull them of your self so I guess you could remember the steps in the opposite order.

The rear motor mount is easily accessable with an aproximately 2 foot socket extention from the top of the engine behind the intake manifold. First, raise and support the car on jack stands. place a block of wood on a shop jack and gently support the motor under the oil pan. loosen the 3 bolts holding the mount to the frame. Then remove the the single bolt going through the center of the rubber bushing. It may be easiest to access that bolt from beneath the car.