Pontiac 12594433 Bracket, Engine Mount Strut & Engine Lift

To check the mounts, raise the engine slightly to remove the weight from them. Begin by raising the vehicle and securely supporting it on jack stands. Then, position a jack under the engine oil pan with a large block of wood between the jack head and the oil pan. Carefully raise the engine just enough to relieve the weight on the mounts, ensuring no part of your body is under the engine when it is only supported by a jack.

Engine mounts seldom require attention, but broken or deteriorated mounts should be replaced immediately to prevent damage or wear to driveline components.

To replace the mounts, disconnect the cable from the negative terminal of the battery, raise the vehicle securely on jackstands, and remove the nuts attaching the mount studs to the engine subframe. Attach an engine hoist to the top of the engine for lifting, avoiding the use of a jack under the oil pan to prevent damage to the oil pump pick-up. If a hoist is unavailable, casting lugs on each side of the engine block can support the engine's weight during mount replacement. Raise the engine slightly until the mount can be unbolted from the block, then remove it from the vehicle.

Check for relative movement between the mount plates and the engine or frame using a large screwdriver or 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 inspect the rear mount, elevate the vehicle and push up and down on the transmission tailshaft while observing the mount. If the rubber separates from the metal plate or the tailshaft moves excessively, replace the mount. If there is movement between the mount's metal plate and the attachment point, tighten the bolts or screws.

Applying rubber preservative can help slow deterioration.

To check the mounts, raise the vehicle securely on jackstands and position a jack under the engine oil pan with a large block of wood in between. Carefully raise the engine just enough to relieve the weight from the mounts, ensuring no part of your body is under the engine when it is only supported by a jack.

They need to be replaced, which can be done with the engine/transmission still in the vehicle.

Engine mounts typically do not require attention, but any broken or deteriorated mounts should be replaced immediately to prevent damage or wear on the driveline components.

Inspect the mounts for any cracks, hardened rubber, or separation from the metal plates. Note that the rubber may split down the center. Check for any relative movement between the mount plates and the engine or frame using a large screwdriver or pry bar.

During the check, the engine must be raised slightly to remove the weight from the mounts. Raise the vehicle securely on jack stands, position a jack under the engine oil pan with a large block of wood between the jack head and the oil pan, and carefully raise the engine just enough to relieve the weight on the mounts.