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IMRC Valve Position Sensor Replacement
Remove the two screws (A) and the IMRC position sensor (B).
Fig 1: Removing/Installing Two Screws & IMRC Position Sensor
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install the sensor with a new O-ring (C), and make sure the projection (D) inside the IMRC valve matches up with the groove (E) in the sensor.