For 1990-2009 cars

1. Clean the oil pan in solvent. Remove all sludge and debris from the oil pan.

Important: Do not use a motorized tool or bristle disc to clean this component.

2. Remove all sealing material from the oil pan rails.
3. Inspect the oil pan sealing surfaces for nicks or damage. Remove any minor nicks with a fine flat file.
4. Inspect the threads in the oil drain plug hole.
5. Replace the oil pan if necessary.