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40 Deluxe · 01-23-2018, 10:31 PM

If it's a leaky head gasket, there will be combustion gasses in the radiator. It's easy to test. Auto Zone and O'Reilly's tool loan program includes this tester. You just buy the test fluid and the tester use is free if you return it unbroken.

01-23-2018, 10:31 PM	#15
40 Deluxe Senior Member Join Date: May 2010 Location: now Kuna, Idaho Posts: 3,778	Re: Help with radiator cap spray If it's a leaky head gasket, there will be combustion gasses in the radiator. It's easy to test. Auto Zone and O'Reilly's tool loan program includes this tester. You just buy the test fluid and the tester use is free if you return it unbroken.