Reuse of Quick-Connector

Replace the port and connector if scratch, dent or crack is found.
Remove any dirt build up on the port when installing the connector. Replace the connector, if there is any forms of rust, dent, scratch.
After cleaning the port, insert it straight into the connector until it clicks. After it clicks, try pulling it out to make sure that it is not drawn and is securely locked.

Fig 1: Installing Connector
Courtesy of ISUZU MOTOR CO.