I hear a "honking" noise at idle and acceleration on 1999 Honda Civic

I recently replaced my radiator, and I hear this "honking" noise upon acceleration and at idle...I THINK it's coming from the resevoir...can anyone help?

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2 answers 1 comment
pressure test rad cap or just repl to elimate it. its only like 6 bucks then you will know for sure
Check rad. cap.
I did that first, it seems to have a snug fit.