Prestone AF-1420 Antifreeze/Coolant Tester Pack of 1 electronics_update_2023 FUNCTIONS and POWERThe EGR valve

FUNCTIONS and POWERThe EGR valve offers the intake manifold access to unburnt gases or otherwise wasted exhaust gases that can be used to heat the air/fuel mixture

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Prestone AF-1420 Antifreeze/Coolant Tester Pack of 1 electronics_update_2023 FUNCTIONS and POWERThe EGR valvePrestone AF 1420 Antifreeze Coolant Tester Prestone Antifreeze Coolant Tester is a professional do it yourself tester that easily tests for anti freeze anti boil protection. Allows visual inspection for rust and sediment. It is important to maintain your antifreeze coolant at the proper concentration to provide good corrosion protection as well as prevent freeze ups and boil overs. This tester provides a quick and easy method to safely collect a