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262 4.3l

  1. What is this part called?

    Heating & Air Conditioning Systems
    Hello, I'm stumped! Can't figure out what this part is. It will leak antifreeze occasionally and is hooked up to a vacuum line. It's on the hose that goes from the heater core to the intake on a 262 4.3L. See pictures below. Thanks!! Top Underneath Thanks in advance.