Counterbalance Shaft

WARNING: This page is about a different car, the 2003 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

Check the oil holes for clogging and clean if necessary.
Check the journal for seizure, damage and contact with bearing. If there is anything wrong with the journal, replace the counterbalance shaft, bearing or front case assembly if required.

Fig 1: Locating Counterbalance Shaft Inspection Points
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.