Please check notes in each part listing to ensure the Radiator Drain Petcock is correct for your 1978 MERCURY ZEPHYR with a 2.3L 140 SOHC engine. Special restrictions like "California only" or "with sport package" may indicate a Radiator Drain Petcock fits only certain 1978 MERCURY ZEPHYR models.
Clicking a "More Info" link will display a picture and/or other details about that Radiator Drain Petcock in a separate window (you may need to turn off your pop-up-blocking software for this to work).
After choosing a Radiator Drain Petcock, click the "Add Part" button. Shipping costs will be shown on the Shopping Cart page. You may use your browser's Back button or click "Find More Parts" to find more Cooling System parts, other MERCURY ZEPHYR parts or parts for a different vehicle. Please try our Interactive Catalog (click link above) for faster searching. Both catalogs use the same shopping cart so any auto parts you've already chosen for your 1978 MERCURY will not be lost if you switch.
