>>A<< Oil Pressure Switch Installation

WARNING: This page is about a different car, the 2012 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

Apply sealant to the oil pressure switch thread.
Specified sealant: Three bond 1215 or equivalent

Fig 1: Applying Sealant To Oil Pressure Switch Thread
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

CAUTION: After the installation, until a sufficient period of time (one hour or more) elapses, do not apply the oil or water to the sealant application area or start the engine.
In the same manner as removal, use special tool MB992118 to tighten the oil pressure switch to the specified torque.
Tightening torque: 10 ± 2 N.m (89 ± 17 in-lb)

NOTE: Install the engine oil pressure switch immediately after applying sealant.

Fig 2: Identifying Engine Oil Pressure Switch With Special Tool
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.