GMC 97287678 Engine Torque Strut Mount

Engine mounts seldom require attention, but broken or deteriorated mounts should be replaced immediately to prevent damage to driveline components. During the check, the engine must be raised slightly to remove the weight from the mounts. Begin by raising the vehicle and securely supporting it on jackstands. Inspect the mounts for any cracks, hardened rubber, or separation from the metal plates, noting that the rubber may split down the center. Check for relative movement between the mount plates and the engine or frame using a large prybar; if movement is noted, check the tightness of the mount fasteners before condemning the mounts, as broken mounts typically allow the engine to move easily when pried or under load. To replace the mounts, disconnect the cable from the negative terminal of the battery, then raise the vehicle and support it securely on jackstands. For 4WD models, remove the interfering driveaxle. If working on the left mount, remove the left inner fender splash shield and the exhaust manifold heat shield on most models. Remove the engine mount-to-frame bracket bolts, noting that there are three bolts on each side securing the mounts to the frame bracket. Attach an engine hoist to the top of the engine for lifting; avoid using a jack under the oil pan to prevent damage to the oil pump pick-up. If a hoist is unavailable, a jack can be placed under the large casting lugs on each side of the engine block at the rear to support the engine's weight while replacing the mounts, though the starter motor must be removed to access the right side lug. Unbolt the mount from the engine block, then raise the engine enough to remove the mount from between the engine and the frame. Installation follows the reverse order of removal, using non-hardening thread-locking compound on the mount bolts and ensuring they are tightened to the specified torque.