2001 Buick Regal Oxygen Sensor

You can position the oil drain pan under the engine oil drain plug, remove the engine oil drain plug, inspect the engine oil drain plug, repair or replace it if necessary, inspect the engine oil drain plug sealing surface on the oil pan, remove the Oil Filter, inspect the oil filter sealing area on the oil filter adapter, repair or replace if necessary.

You can install the Oil Pump, the oil pump bolts, and the case side cover.

You can dip the connecting rod cap bolts in clean engine oil, use clean engine oil to lubricate the bearing surface, install the upper connecting Rod Bearing, install the lower connecting rod bearing to the connecting rod cap, the connecting rod cap, the connecting rod cap bolts, the spark plug(s) to the cylinder(s), the oil pan, and inspect for proper oil pressure, and leaks.