Q: How should engine mounts be inspected and replaced on Nissan 300ZX?A: Engine mounts should be periodically inspected for hardening or cracking of the rubber, or separation of the rubber from the metal backing. To replace the front mounts, loosen the nuts and bolts retaining them to the engine mounting bracket and suspension crossmember on both sides of the engine. Take the weight of the engine off the mounts by placing a jack and wooden block under the oil pan, carefully raising the engine enough to allow removal of the mounts. If the old mounts are to be reused, mark them clearly to ensure they are installed right side up on the same side as before. Remove the nuts and bolts retaining the mounts and take them out, noting the correct installed position. Installation follows the reverse of the removal procedure.