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Cooling issues

Discussion in 'Chevy Trucks' started by MarkEagleUSA, Feb 27, 2011.

  1. MarkEagleUSA

    MarkEagleUSA Senior Member
    Messages: 321

    Temp gauge reads approx 200, upper hose is hot to the touch, lower hose is cold, heat seems to work fine. Does this indicate a t-stat or water pump problem?

    Also, what's the purpose of the little rubber "cap" right below the radiator fill?
  2. tac48

    tac48 Member
    Messages: 41

    Sounds like t-stat is working if upper hose is hot, but sounds like you may not be getting flow through the radiator. T-stat is cheap and easy to replace. Definitely would not hurt to replace it regardless of what else you find. I am guessing the cap you are referring to is a plug or cap below the rad cap on a heater hose port. It makes the radiator fit more years as some trucks have a heater hose that connects there.