2002 Buick LeSabre Catalytic Converter

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

Aspecial anti-seize compound is used on the Oxygen Sensor threads. New service sensors should already have the compound applied to the threads. Coat the threads of a reused sensor with anti-seize compound P/N 5613695 or equivalent.

The removal procedure is to remove the fuel injector sight shield and the MAP sensor, then use a 16 mm (5/8 inch) socket to press the access cover down and rotate 1/4 turn counterclockwise, remove the access cover then remove the PCV Valve and the O-ring from the intake manifold.