GM 9158421
Oil Pan

The repair process starts by disconnecting the battery's negative terminal and then supporting the car. Start by removing the lower Oil Pan as well as nuts from the frame bracket that secure the engine mount along with engine splash shield bolts and the shield itself. Start by detaching the a/c compressor hose and ground strap bolt from the upper Oil Pan's front section. Next, separate the catalytic converter hanger bolts from the hanger bracket and Exhaust Manifold catalytic converter nuts. For the next step lower the catalytic converters before securing them with mechanic wire then remove the two idler arm bolts to finish with lowering the vehicle. The combination of engine support fixture (J 28467-A), engine support fixture adapter (J 28467-450), and lift brackets (J 36857) provides engine support before technicians can raise the vehicle again and install jack stands to the engine frame assembly. You should remove the four rear frame bolts yet keep the two front frame bolts loose. Proceed by using jack stands to lower the engine frame assembly before you remove the four transmission bolts from the upper Oil Pan and all but the four corner upper Oil Pan bolts that require loose corner bolts. Use a soft-faced hammer to carefully push the upper Oil Pan toward the vehicle front and collect any loose rubber seal before cleaning both mating surfaces without silicone left behind. A washing unit should clean the Oil Pan and compressed air should dry it before moving on. Test the silicone sealing compound gm p/n 12346286 or equivalent, place a 3 mm bead on the upper Oil Pan and around the rear crankshaft bearing cap joints before feeding the upper Oil Pan through the front of the vehicle. Place the engine frame back into its original position before you install the four rear frame bolts that need 150 nm (111 ft. Lbs.) torque. Tighten the front frame bolts to 65 nm (48 ft. Lbs.) first. After removing the jack stands you should lower the vehicle and utilize the engine support fixture to guide the engine gradually into position while checking motor mounts alignment before discarding the fixture. Reposition the transmission bolts tightly to 40 nm (30 ft. Lbs.) at the upper Oil Pan. Lift the relay rod while you install and torque the right idler arm bolts to 60 nm (44 ft. Lbs.) next, position the catalytic converters and install their nuts with 25 nm (18 ft. Lbs.) torque. Install each catalytic converter hanger bolt with 20 nm (15 ft. Lbs.) torque before adding the upper Oil Pan A/C Hose strap bolt to 8 nm (71 inch lbs.) then set engine mount lower nuts to 55 nm (41 ft. Lbs.). After installing the lower Oil Pan and splash shield, secure the splash shield bolts to 10 nm (89 inch lbs.) torque specifications and while lowering the vehicle, add engine oil to the crankcase and perform leak inspections.

Remove the rubber seal and all RTV sealant, thoroughly cleaning the oil pan housing and engine block.

Remove the 4 splash shield bolts and take off the splash shield.