GM 22188284
Motor Mount

The first step for inspecting the Engine Mount involves vehicle lifting. The inspection should focus on evaluating all bolts within the Engine Mount brackets from the engine to the engine bracket through-bolts and Engine Mount to frame brackets for presence of loose or missing hardware after which necessary replacements should be made. When you raise the engine avoid putting the jack under the Oil Pan because it can risk damaging the components. Also avoid placing it on any sheet metal or Crankshaft Pulley. To reach the square tab on the left side, uninstall the oil filter adapter while the square tab on the right requires Starter removal. A jack positioned on the square tab at the engine block rear will lift up the engine to eliminate stress from the mount while testing the rubber cushion. Engine Mount replacement is needed when heat check cracks appear on the hard rubber surface or when the rubber cushion detaches from the metal plate or when a split exists throughout the rubber cushion. After checking all systems proceed with reinstallation of the Starter and oil filter adapter followed by lowering the vehicle.

Begin the replacement of a left Engine Mount by disconnecting the negative cable from the battery followed by vehicle elevation. First remove the oil filter adapter before uninstalling both the through-bolt and nut securing the Engine Mount for the targeted side. Crank up the engine block using a jack applied to its square tab at the rear until reaching the removal point for the Engine Mount. Begin by accessing the fender wheelhouse to reach and remove the two upper bolts holding the right Engine Mount bracket. Then uninstall the Engine Mount bracket itself after disengaging all Engine Mount bracket to engine securing bolts. During awd modification the Engine Mount requires removal by first unfastening bolts that secure it to the frame then removing the mount. In order to work on the Engine Mount for a rwd vehicle one must unfasten all bolts and nuts that keep the mount attached to the frame bracket. The left side Engine Mount frame bracket should be removed from the frame only when absolutely needed. Start by mounting the engine to the frame for awd vehicles and tighten the bolts to 59 nm (44 ft. Lbs.). The installation of the frame bracket bolts to 47 nm (35 ft. Lbs.) and the nuts to 42 nm (31 ft. Lbs.) must follow the initial reinstallation of the rwd vehicle left side bolts and nuts together with the Engine Mount frame bracket when it was removed. After slotting the left side Engine Mount onto the frame bracket follow by tightening the mount to frame bolts until they reach 47 nm (35 ft. Lbs.) and finishing with tightening the nuts to 42 nm (31 ft. Lbs.). Fitting the Engine Mount bracket onto the engine requires torquing the bracket bolts to 64 nm (47 ft. Lbs.). Lower the engine before you install both the through-bolt and nut of the Engine Mount and tighten them to 68 nm (50 ft. Lbs.). Finish the procedure by installing the oil filter adapter then lowering the vehicle while also reestablishing the battery negative cable connection.

Install the engine mount bracket to the engine and tighten the bracket bolts to 64 Nm (47 ft. lbs.).

Lower the transmission and install the two nuts securing the transmission mount to the transmission support, tightening them to 40 Nm (30 ft. lbs.).

Reinstall the starter, right fender wheelhouse extension, right front tire, lower the vehicle, and reconnect the battery negative cable.

Install the engine mount bracket to the engine and tighten the bracket bolts to 64 Nm (47 ft. lbs.).

For an AWD vehicle, remove the bolts for the engine mount to the frame; for a RWD vehicle, remove the bolts and nuts for the engine mount to the frame.

The transmission mount to the transmission support retaining nut or nuts.

Use a jack on the square tab at the rear of the engine block.

Lower the transmission and install the two nuts securing the transmission mount to the transmission support, tightening them to 40 Nm (30 ft. lbs.).

Install the engine mount to the frame, tightening the bolts to 59 Nm (44 ft. lbs.).

Lift the transmission just enough to take out the transmission mount.