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Answered 2007-03-16 13:34:02
take the cap off and check this look under the cap and see if the rubber seal is broken or it looks worn but if in doubt replace it a mechanic has tool for connecting to radiator to check cap pressure. but if you think radiator cap is the problem, just buy a new one they cost under 10 bucks. if that is the problem, it is sure cheaper than going to a mechanic
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