virtually any liquid cooled internal
11 Oct 2016
Combustion gas, when it enters the cooling system through any leak, accumulates in the air cushion above the radiator coolant level (in sealed coolant systems, this air cushion must be created by lowering the coolant level about an inch and a half). The Leak Tester analyzes this air: The blue fluid turns yellow when CO2
TO CONDUCT THE TEST: WARNING! Engine should be warm, and allowed to idle during the test. WARNING! Remove radiator cap, and check to see that radiator coolant level is low enough to prevent plugging of unit. Check color of test fluid, If blue, O.K. to use. Remove bulb by gently twisting.
Equip cars, trucks & SUVs with Block Tester from AutoZone. Get Yours Today! We know our parts and products.
5 Dec 2012
Bought the Napa "block tester" with the intent it would tell me if I am burning coolant and need to replace intake or head gaskets. Use as per instructions sometimes you have to raise the cone out of the radiatior a little or the bulb can not move air and do not get coolant in the blue fluid or you will not get a
14 Jul 2013

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January 2025