Attention! When performing repair operations, a special tool GM N J28467 is available to ground the engine. If the vehicle is only supported by a jack, do not get under the engine and gearbox! Wrong method of lifting or failure of the winch or hoist can result in serious injury or even death.
Note. Information on mounting the gearbox is contained in chapter 7, section 8.
1. Engine mounts are generally maintenance-free, but if they break or become damaged, they must be replaced immediately, otherwise the extra stress on the transmission may result in damage or premature wear.
Examination
2. During the test, the engine should be slightly raised so that the mounts are unloaded.
3. Raise the vehicle and place it securely on stands. Place a piece of wood between the jack pad and the oil pan, then carefully raise the engine just enough to relieve the mounts.
4. Check the bearings for defects such as hardening, cracking and peeling of the rubber element from the metal plates (see illustration). Sometimes cracking occurs right in the center of the rubber element.
19.4. It looks like a broken engine mount - the rubber has separated from the metal substrate (for clarity, the part is removed from the car)
5. Check for relative movement of the support plates and the motor or frame (using a large screwdriver as a lever, push down on the rod to see if the support has shifted). If relative movement is detected, lower the engine and tighten the mounts.
6. To increase the life of the supports, put on protective rubber boots on them.
Replacement
7. Disconnect the cable from the negative battery terminal, then jack up the vehicle and support it securely on stands (if it hasn't been done yet).
8. Raise the engine slightly with a jack or hoist. Place a stand under the engine as described above. Turn away bolts and remove a support from an arm of a frame.
9. Having turned away bolts of fastening of a support to the block of cylinders, remove a support.
10. Installation of the support is carried out in the reverse order. Apply sealant to all fasteners and tighten securely.