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How to test an expansion tank cap? Solved x 2


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I have the old one.

I have a new one two days old

I have an even newer one one day old.

I suspect all three are fine.

Short of re-entering coolant hell by putting the first two on the car, anyone any idea how to test their pressure ability? Aiui It is supposed to be 1 to 1.1 bar - something like 14.5 to 16psi.


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