Chevrolet 39117686 Mount, Engine

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Engine mounts seldom require attention, but broken or deteriorated mounts should be replaced immediately to prevent damage or wear on driveline components. To check the mounts, raise the engine slightly to remove the weight from them, supporting the vehicle securely on jackstands and using a jack with a block of wood under the oil pan. Inspect the mounts for cracks, hardened rubber, or separation from the bushing, and check for relative movement between the mount and the engine or frame, tightening fasteners if movement is noted. When replacing a mount, disconnect the negative battery cable, and if necessary, remove components like the air filter housing or battery tray. Raise the vehicle securely on jackstands, then use a block of wood to support the engine or transaxle while taking the weight off the mounts. It is important not to disconnect more than one mount at a time unless the engine will be removed. Remove the fasteners holding the mount to the bracket, and installation is the reverse of removal. Before tightening the mounting bolts, ensure the engine/transaxle assembly is aligned and balanced in weight distribution among the mounts. Support the engine and transaxle with floor jacks, loosening the necessary bolts to create a 1/4-inch gap between the mounts and their brackets. Center the front and rear transaxle mounts in their brackets, then tighten the bolts to the specified torque. After lowering the floor jacks and raising the vehicle securely on jackstands, shake the engine and transaxle back and forth, tightening the transaxle rear through-bolt followed by the front through-bolt in that order. Finally, install the under-vehicle splash shield and reconnect the battery.