Coolant Bypass Elbow on Thermostat Housing - Tap and Thread for Aftermarket 90° Fitting

The pressed-in coolant bypass elbow on the 7M-GE thermostat housing breaks or rots out, and the OEM housing (Toyota part #16333-42030) is discontinued worldwide with no separate replacement elbow available.

The factory pressed-in elbow on the thermostat housing deteriorates over time and cannot be replaced separately since Toyota discontinued the entire housing assembly (16333-42030).

Moderate confidence — Multiple community members agreed on this solution