The engine mounts usually look good. if they are slightly cracked on the "sides" then they are most likely bad. If you have engine shocks, replace as well... I think the shocks make the greatest difference in the shaking on the car. you can also tell how bad the engine mounts are by looking at the engine fan on the fan shroud.. compare the amount of space available at the bottom of the shroud to the top... again, spend a couple extra bucks and get the engine shocks, engine mounts and engine shock bushings... you wont regret it!