GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Buick
🢒
2009
🢒
Lucerne
🢒
Engine
🢒
Engine Mechanical - 3.9L
🢒 Oil Pan Replacement
Special Tools
J 39505
Torque Wrench Adapter
Removal Procedure
Disconnect the negative battery cable. Refer to
Battery Negative Cable Disconnection and Connection
.
Remove the engine mount struts. Refer to
Engine Mount Strut Replacement
.
Install the engine support fixture. Refer to
Engine Support Fixture
.
Remove the catalytic converter. Refer to
Catalytic Converter Replacement
.
Remove the oil pan drain plug.
Drain the crankcase.
Reinstall the oil pan drain plug.
Remove the right front tire and wheel. Refer to
Tire and Wheel Removal and Installation
.
Remove the front wheelhouse liner. Refer to
Front Wheelhouse Liner Replacement
.
Remove the accessory drive belt. Refer to
Drive Belt Replacement
.
Remove the oil filter adapter. Refer to
Oil Filter Adapter and Bypass Valve Assembly Replacement
.
Remove the starter. Refer to
Starter Replacement
.
Remove the air conditioning (A/C) compressor nut and bolt.
Remove the A/C compressor rear bolt and position the compressor aside.
Disconnect the oil level sensor electrical connector.
Remove the engine harness clips from the oil pan and the transaxle brace.
Remove the front transaxle brace to engine bolts and the brace.
Loosen the transaxle mount lower nuts. Refer to
Transmission Mount Replacement - Left Side
.
Remove the rear transaxle brace to engine/oil pan bolts.
Lower the vehicle.
Using the engine support fixture, raise the engine.
Raise the engine.
Using the
J 39505
, remove the right side oil pan side bolts.
Remove the left side oil pan side bolts (1).
Remove the oil pan bolts (2).
Remove the oil pan.
Remove the oil pan gasket.
Clean the following items:
•
The oil pan flanges
•
The oil pan rail
•
The front cover
•
The rear main bearing cap
•
The threaded holes
Installation Procedure
Apply sealer to both sides of the crankshaft rear main bearing cap (1) and the front cover/block mating area. Press the sealer into the gap using a putty knife. Refer to
Adhesives, Fluids, Lubricants, and Sealers
for the correct part number.
Install a NEW oil pan gasket.
Position the oil pan to the engine.
Caution:
Refer to
Fastener Caution
in the Preface section.
Install the oil pan bolts (2) and tighten to
25 N·m (18 lb ft)
.
Install the left side oil pan side bolts (1).
Using the
J 39505
, install the right side oil pan side bolts and tighten to
50 N·m (37 lb ft)
.
Install the engine mount bracket bolts and tighten to
50 N·m (37 lb ft)
.
Lower the vehicle.
Using the engine support fixture, lower the engine.
Raise the vehicle.
Install the rear transaxle brace to engine/oil pan bolts and tighten to
63 N·m (46 lb ft)
.
Install the front transaxle brace and the brace to engine bolts and tighten to
63 N·m (46 lb ft)
.
Connect the oil level sensor electrical connector.
Install the engine harness clips to the oil pan and the transaxle brace.
Tighten the transaxle mount lower nuts. Refer to
Transmission Mount Replacement - Left Side
.
Position the A/C compressor, and install the A/C compressor nut and bolt and tighten to
50 N·m (37 lb ft)
.
Install the A/C compressor rear bolt and tighten to
50 N·m (37 lb ft)
.
Install the starter. Refer to
Starter Replacement
.
Install the oil filter adapter. Refer to
Oil Filter Adapter and Bypass Valve Assembly Replacement
.
Install the accessory drive belt. Refer to
Drive Belt Replacement
.
Install the front wheelhouse liner. Refer to
Front Wheelhouse Liner Replacement
.
Install the right front tire and wheel. Refer to
Tire and Wheel Removal and Installation
.
Install the catalytic converter. Refer to
Catalytic Converter Replacement
.
Lower the vehicle.
Remove the engine support fixture.
Install the engine mount struts. Refer to
Engine Mount Strut Replacement
.
Fill the crankcase with new engine oil.
Connect the negative battery cable. Refer to
Battery Negative Cable Disconnection and Connection
.