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Old 04-07-2014, 11:34 PM
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EffieTrucker EffieTrucker is offline
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Have you looked down in the radiator to see if bubbles are coming up inside?

First I would test the cap. New doesn't always mean good.

Then I would put a pressure tester on the radiator to see how fast it's building pressure. If it's not hot but building enough pressure to blow past a 4# cap there might be more going on than just the radiator.
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