Q: Radiator had no pressure?

asked by on January 31, 2017

I unscrewed my radiator cap to test my head gasket (the engine was hot because I had just drove it) and there was little to no pressure release when I unscrewed the cap? Also when the trucks hot and I have the cap off, I see no movement of the fluid?

My car has 124100 miles.
My car has an automatic transmission.

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