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coolant system

  1. coolant changing questions.

    Engine Topics
    So I'm new to working on cars and new owner of 84 caballero 305 i want to change the coolant because it was running hot. is it as simple as un do plug let coolant drain , flush with water , fill with coolant50/50? I researched and some said stuff about block plugs? I appreciate the advice and...
  2. 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.