GM 22805661 Bracket, Engine 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, then position a jack under the engine oil pan with a large block of wood between the jack head and the oil pan, raising the engine just enough to relieve the weight on the mounts without fully supporting the engine. Inspect the mounts for any cracks, hardened rubber, or separation from the metal plates, noting that rubber may split down the center. Applying rubber preservative or WD-40 can help slow deterioration. Check for any relative movement between the mount plates and the engine or frame using a large screwdriver or prybar; if movement is detected, first check the tightness of the mount fasteners before concluding that the mounts are faulty, as broken mounts typically allow noticeable engine movement when pried or under load. For replacement, raise the vehicle and support it securely on jackstands, disconnect the cable from the negative battery terminal, and remove the under-vehicle splash shield. Position a jack under the engine oil pan with a wood block, ensuring it is not under the oil pan drain plug, then remove the engine mount-to-subframe nut and the engine mount-to-engine bracket nut. Raise the engine slightly to remove the engine mount, noting that on some models, it may be necessary to support the subframe and loosen the subframe bolts to provide enough clearance for removal. Installation follows the reverse order of removal, using non-hardening thread locking compound on the mount bolts and tightening them to the specified torque.

Engine mountage does not need much service but in case of damage the mounts should be replaced as often as possible so as not to harm the parts of the car's power train. In the check the engine needs to be lifted slightly so that the weight is taken off the mounts. Start by lifting the vehicle and placing it on jack stands before placing a jack under the engine oil sump and then placing a large wooden beam between the jack head and the oil sump to lift the engine very lightly such that pressure is taken off the mounting assembly but it is not supporting the weight of the engine entirely. Horse the mounts to observe crack, hardened rubber, or separation from the metal plates as the rubber may be parted down the center. Use a large screwdriver or pry bar and see if the mount plates move with the engine or subframe; If they do, check the tightness of the mount fasteners as damaged mounts can be identified by the fact that when the mount is prised apart or under load, the engine moves easily. For that, remove the cable from the negative battery terminal, then, to remove the engine mount to mount bracket, there will be a nut at the top. Loosen the engine mount to subframe nut from under the car again and raise the vehicle once more on jackstands and then tighten it. Place a floor jack with a block of wood under the oil pan and lift the engine only to the extent that the mount can be unbolted. Reinstallation is done in the reverse order as removal with all fasteners being tightened to the right torque.